From 1eb1a561ab7f78251ffb2431d5889f0bae13d980 Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Thu, 12 Mar 2026 22:19:26 +0000
Subject: [PATCH 01/12] completed awk

---
 individual-shell-tools/awk/script-01.sh         | 2 ++
 individual-shell-tools/awk/script-02.sh         | 1 +
 individual-shell-tools/awk/script-03.sh         | 1 +
 individual-shell-tools/awk/script-04.sh         | 1 +
 individual-shell-tools/awk/script-05.sh         | 1 +
 individual-shell-tools/awk/script-06-stretch.sh | 3 +++
 individual-shell-tools/awk/script-07-stretch.sh | 1 +
 7 files changed, 10 insertions(+)

diff --git a/individual-shell-tools/awk/script-01.sh b/individual-shell-tools/awk/script-01.sh
index 8db4390af..e75a263cf 100755
--- a/individual-shell-tools/awk/script-01.sh
+++ b/individual-shell-tools/awk/script-01.sh
@@ -4,3 +4,5 @@ set -euo pipefail
 
 # TODO: Write a command to output just the names of each player in `scores-table.txt`.
 # Your output should contain 6 lines, each with just one word on it.
+
+awk '{print $1}' scores-table.txt
diff --git a/individual-shell-tools/awk/script-02.sh b/individual-shell-tools/awk/script-02.sh
index 5956be9bd..5559ca2fb 100755
--- a/individual-shell-tools/awk/script-02.sh
+++ b/individual-shell-tools/awk/script-02.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the names of each player, as well as their city.
 # Your output should contain 6 lines, each with two words on it, separated by a space.
+awk '{print $1, $2}' scores-table.txt
\ No newline at end of file
diff --git a/individual-shell-tools/awk/script-03.sh b/individual-shell-tools/awk/script-03.sh
index af7c6e8b9..55c51c48e 100755
--- a/individual-shell-tools/awk/script-03.sh
+++ b/individual-shell-tools/awk/script-03.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player along with the score from their first attempt.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 1".
+awk '{print $1, $3}' scores-table.txt
diff --git a/individual-shell-tools/awk/script-04.sh b/individual-shell-tools/awk/script-04.sh
index bf15703c7..cecbb0b72 100755
--- a/individual-shell-tools/awk/script-04.sh
+++ b/individual-shell-tools/awk/script-04.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player in London along with the score from their last attempt.
 # Your output should contain 3 lines, each with one word and one number on it.
 # The first line should be "Ahmed 4".
+awk '$2=="London" {print $1, $NF}' scores-table.txt
diff --git a/individual-shell-tools/awk/script-05.sh b/individual-shell-tools/awk/script-05.sh
index d1680cb02..49c4e9da5 100755
--- a/individual-shell-tools/awk/script-05.sh
+++ b/individual-shell-tools/awk/script-05.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player along with the number of times they've played the game.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 3".
+awk '{count=0; for(i=3;i<=NF;i++) count++; print $1, count}' scores-table.txt
\ No newline at end of file
diff --git a/individual-shell-tools/awk/script-06-stretch.sh b/individual-shell-tools/awk/script-06-stretch.sh
index 0201e6378..5abf1ecfc 100755
--- a/individual-shell-tools/awk/script-06-stretch.sh
+++ b/individual-shell-tools/awk/script-06-stretch.sh
@@ -6,3 +6,6 @@ set -euo pipefail
 
 # TODO: Write a command to output the total of adding together all players' first scores.
 # Your output should be exactly the number 54.
+awk '{
+  for(i=3;i<=3;i++) total += $i
+} END {print total}' scores-table.txt
\ No newline at end of file
diff --git a/individual-shell-tools/awk/script-07-stretch.sh b/individual-shell-tools/awk/script-07-stretch.sh
index 3f7155880..485223232 100755
--- a/individual-shell-tools/awk/script-07-stretch.sh
+++ b/individual-shell-tools/awk/script-07-stretch.sh
@@ -7,3 +7,4 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player along with the total of adding all of that player's scores.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 15". The second line should be "Basia 37"
+awk '{sum=0; for(i=3;i<=NF;i++) sum += $i; print $1, sum}' scores-table.txt
\ No newline at end of file

From cc96f10ade0bb9a5f4eae9d597547a118dd137c9 Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Thu, 12 Mar 2026 22:36:34 +0000
Subject: [PATCH 02/12] completed cat

---
 individual-shell-tools/cat/script-01.sh         | 1 +
 individual-shell-tools/cat/script-02.sh         | 1 +
 individual-shell-tools/cat/script-03.sh         | 1 +
 individual-shell-tools/cat/script-04-stretch.sh | 1 +
 4 files changed, 4 insertions(+)

diff --git a/individual-shell-tools/cat/script-01.sh b/individual-shell-tools/cat/script-01.sh
index c85053e0f..9e374dc80 100755
--- a/individual-shell-tools/cat/script-01.sh
+++ b/individual-shell-tools/cat/script-01.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the contents of the helper-1.txt file inside the helper-files directory to the terminal.
 # The output of this command should be "Once upon a time...".
+cyf@MacBookPro individual-shell-tools % cat helper-files/helper-1.txt 
diff --git a/individual-shell-tools/cat/script-02.sh b/individual-shell-tools/cat/script-02.sh
index 01bbd5eab..e5ea59278 100755
--- a/individual-shell-tools/cat/script-02.sh
+++ b/individual-shell-tools/cat/script-02.sh
@@ -11,3 +11,4 @@ set -euo pipefail
 # It looked delicious.
 # I was tempted to take a bite of it.
 # But this seemed like a bad idea...
+cyf@MacBookPro individual-shell-tools % cat helper-files/helper-*.txt
diff --git a/individual-shell-tools/cat/script-03.sh b/individual-shell-tools/cat/script-03.sh
index 37573b0c1..e778d927e 100755
--- a/individual-shell-tools/cat/script-03.sh
+++ b/individual-shell-tools/cat/script-03.sh
@@ -9,3 +9,4 @@ set -euo pipefail
 # 1 It looked delicious.
 # 2 I was tempted to take a bite of it.
 # 3 But this seemed like a bad idea...
+cyf@MacBookPro individual-shell-tools % cat -n helper-files/helper-3.txt
\ No newline at end of file
diff --git a/individual-shell-tools/cat/script-04-stretch.sh b/individual-shell-tools/cat/script-04-stretch.sh
index 00fe3c48b..b3238d06a 100755
--- a/individual-shell-tools/cat/script-04-stretch.sh
+++ b/individual-shell-tools/cat/script-04-stretch.sh
@@ -13,3 +13,4 @@ set -euo pipefail
 # 3 It looked delicious.
 # 4 I was tempted to take a bite of it.
 # 5 But this seemed like a bad idea...
+cyf@MacBookPro individual-shell-tools % cat helper-files/* | nl -v 1 -n ln
\ No newline at end of file

From 834a11124903633baafcbc780ac267e99ec07f2d Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Thu, 12 Mar 2026 23:08:55 +0000
Subject: [PATCH 03/12] completed grep

---
 individual-shell-tools/grep/script-01.sh | 1 +
 individual-shell-tools/grep/script-02.sh | 1 +
 individual-shell-tools/grep/script-03.sh | 1 +
 individual-shell-tools/grep/script-04.sh | 1 +
 individual-shell-tools/grep/script-05.sh | 1 +
 individual-shell-tools/grep/script-06.sh | 1 +
 individual-shell-tools/grep/script-07.sh | 1 +
 7 files changed, 7 insertions(+)

diff --git a/individual-shell-tools/grep/script-01.sh b/individual-shell-tools/grep/script-01.sh
index fb05f42f2..41cb0b856 100755
--- a/individual-shell-tools/grep/script-01.sh
+++ b/individual-shell-tools/grep/script-01.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt said by the Doctor.
 # The output should contain 6 lines.
+grep '^Doctor:' dialogue.txt
\ No newline at end of file
diff --git a/individual-shell-tools/grep/script-02.sh b/individual-shell-tools/grep/script-02.sh
index df6f85640..381c9cc94 100755
--- a/individual-shell-tools/grep/script-02.sh
+++ b/individual-shell-tools/grep/script-02.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that contains the word Doctor (regardless of case).
 # The output should contain 9 lines.
+grep -i 'Doctor' dialogue.txt
\ No newline at end of file
diff --git a/individual-shell-tools/grep/script-03.sh b/individual-shell-tools/grep/script-03.sh
index 5383fe578..64f0405d0 100755
--- a/individual-shell-tools/grep/script-03.sh
+++ b/individual-shell-tools/grep/script-03.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of lines in dialogue.txt that contain the word Doctor (regardless of case).
 # The output should be exactly the number 9.
+grep -i -c 'Doctor' dialogue.txt
\ No newline at end of file
diff --git a/individual-shell-tools/grep/script-04.sh b/individual-shell-tools/grep/script-04.sh
index 80ee04776..db9b57fbd 100755
--- a/individual-shell-tools/grep/script-04.sh
+++ b/individual-shell-tools/grep/script-04.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that does not contain the word "Hello" (regardless of case).
 # The output should contain 10 lines.
+grep -v -i 'Hello' dialogue.txt
\ No newline at end of file
diff --git a/individual-shell-tools/grep/script-05.sh b/individual-shell-tools/grep/script-05.sh
index 1eb538185..df64a3a38 100755
--- a/individual-shell-tools/grep/script-05.sh
+++ b/individual-shell-tools/grep/script-05.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that contains the string "cure", as well as the line before that line.
 # The output should contain two pairs of two lines of text (with a separator between them).
+grep -B 1 'cure' dialogue.txt
diff --git a/individual-shell-tools/grep/script-06.sh b/individual-shell-tools/grep/script-06.sh
index 5670e3b6c..d4099c8bb 100755
--- a/individual-shell-tools/grep/script-06.sh
+++ b/individual-shell-tools/grep/script-06.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the name of every `.txt` file in this directory which contains a line of dialogue said by the Doctor.
 # The output should contain two filenames.
+grep -h '^Doctor:' dialogue*.txt
\ No newline at end of file
diff --git a/individual-shell-tools/grep/script-07.sh b/individual-shell-tools/grep/script-07.sh
index 9670ebad9..491a4d45f 100755
--- a/individual-shell-tools/grep/script-07.sh
+++ b/individual-shell-tools/grep/script-07.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output, for each `.txt` file in this directory, how many lines of dialogue the Doctor has.
 # The output should show that dialogue.txt contains 6 lines, dialogue-2.txt contains 2, and dialogue-3.txt contains 0.
+grep -c '^Doctor:' dialogue*.txt
\ No newline at end of file

From 1530f68224d16ced5ad12a1c188db94e6d126a1d Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Thu, 12 Mar 2026 23:23:01 +0000
Subject: [PATCH 04/12] completed ls

---
 individual-shell-tools/ls/script-01.sh | 1 +
 individual-shell-tools/ls/script-02.sh | 1 +
 individual-shell-tools/ls/script-03.sh | 1 +
 individual-shell-tools/ls/script-04.sh | 3 ++-
 4 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/individual-shell-tools/ls/script-01.sh b/individual-shell-tools/ls/script-01.sh
index 241b62f5e..081f2c7c2 100755
--- a/individual-shell-tools/ls/script-01.sh
+++ b/individual-shell-tools/ls/script-01.sh
@@ -13,3 +13,4 @@ fi
 
 # TODO: Write a command to list the files and folders in this directory.
 # The output should be a list of names including child-directory, script-01.sh, script-02.sh, and more.
+ls 
\ No newline at end of file
diff --git a/individual-shell-tools/ls/script-02.sh b/individual-shell-tools/ls/script-02.sh
index d0a5a10f4..9fa05d88b 100755
--- a/individual-shell-tools/ls/script-02.sh
+++ b/individual-shell-tools/ls/script-02.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command which lists all of the files in the directory named child-directory.
 # The output should be a list of names: helper-1.txt, helper-2.txt, helper-3.txt.
+ls child-directory
\ No newline at end of file
diff --git a/individual-shell-tools/ls/script-03.sh b/individual-shell-tools/ls/script-03.sh
index 781216d21..7a1a1d315 100755
--- a/individual-shell-tools/ls/script-03.sh
+++ b/individual-shell-tools/ls/script-03.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command which _recursively_ lists all of the files and folders in this directory _and_ all of the files inside those folders.
 # The output should be a list of names including: child-directory, script-01.sh, helper-1.txt (and more).
 # The formatting of the output doesn't matter.
+ls -R
\ No newline at end of file
diff --git a/individual-shell-tools/ls/script-04.sh b/individual-shell-tools/ls/script-04.sh
index 72f3817b3..36a997093 100755
--- a/individual-shell-tools/ls/script-04.sh
+++ b/individual-shell-tools/ls/script-04.sh
@@ -15,9 +15,10 @@ echo "First exercise (sorted newest to oldest):"
 
 # TODO: Write a command which lists the files in the child-directory directory, one per line, sorted so that the most recently modified file is first.
 # The output should be a list of names in this order, one per line: helper-3.txt, helper-1.txt, helper-2.txt.
-
+ls % ls -1t child-directory
 
 echo "Second exercise (sorted oldest to newest):"
 
 # TODO: Write a command which does the same as above, but sorted in the opposite order (oldest first).
 # The output should be a list of names in this order, one per line: helper-2.txt, helper-1.txt, helper-3.txt.
+ls -1tr child-directory
\ No newline at end of file

From 81a2a7d39f50de39154eb36a331b08faa284d698 Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Thu, 12 Mar 2026 23:40:36 +0000
Subject: [PATCH 05/12] completed sed

---
 individual-shell-tools/sed/script-01.sh | 1 +
 individual-shell-tools/sed/script-02.sh | 1 +
 individual-shell-tools/sed/script-03.sh | 1 +
 individual-shell-tools/sed/script-04.sh | 1 +
 individual-shell-tools/sed/script-05.sh | 1 +
 individual-shell-tools/sed/script-06.sh | 1 +
 6 files changed, 6 insertions(+)

diff --git a/individual-shell-tools/sed/script-01.sh b/individual-shell-tools/sed/script-01.sh
index d592970fc..6255a124b 100755
--- a/individual-shell-tools/sed/script-01.sh
+++ b/individual-shell-tools/sed/script-01.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output input.txt with all occurrences of the letter `i` replaced with `I`.
 # The output should contain 11 lines.
 # The first line of the output should be: "ThIs Is a sample fIle for experImentIng wIth sed.".
+sed 's/i/I/g' input.txt
\ No newline at end of file
diff --git a/individual-shell-tools/sed/script-02.sh b/individual-shell-tools/sed/script-02.sh
index abdd64d06..d3f70b8ce 100755
--- a/individual-shell-tools/sed/script-02.sh
+++ b/individual-shell-tools/sed/script-02.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output input.txt with numbers removed.
 # The output should contain 11 lines.
 # Line 6 of the output should be " Alisha".
+sed 's/[0-9]//g' input.txt
\ No newline at end of file
diff --git a/individual-shell-tools/sed/script-03.sh b/individual-shell-tools/sed/script-03.sh
index dd284a296..02b29409e 100755
--- a/individual-shell-tools/sed/script-03.sh
+++ b/individual-shell-tools/sed/script-03.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output input.txt removing any line which contains a number.
 # The output should contain 6 lines.
+sed '/[0-9]/d' input.txt
\ No newline at end of file
diff --git a/individual-shell-tools/sed/script-04.sh b/individual-shell-tools/sed/script-04.sh
index 0052ac6c4..478211422 100755
--- a/individual-shell-tools/sed/script-04.sh
+++ b/individual-shell-tools/sed/script-04.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output input.txt replacing every occurrence of the string "We'll" with "We will".
 # The output should contain 11 lines.
+sed "s/We'll/We will/g" input.txt
\ No newline at end of file
diff --git a/individual-shell-tools/sed/script-05.sh b/individual-shell-tools/sed/script-05.sh
index 2dcc91a0c..6f1b7cba0 100755
--- a/individual-shell-tools/sed/script-05.sh
+++ b/individual-shell-tools/sed/script-05.sh
@@ -6,3 +6,4 @@ set -euo pipefail
 # If a line starts with a number and a space, make the line instead end with a space and the number.
 # So line 6 which currently reads "37 Alisha" should instead read "Alisha 37".
 # The output should contain 11 lines.
+sed -E 's/^([0-9]+) (.*)/\2 \1/' input.txt
\ No newline at end of file
diff --git a/individual-shell-tools/sed/script-06.sh b/individual-shell-tools/sed/script-06.sh
index 0b9390170..83a2adf02 100755
--- a/individual-shell-tools/sed/script-06.sh
+++ b/individual-shell-tools/sed/script-06.sh
@@ -8,3 +8,4 @@ set -euo pipefail
 # The output should contain 11 lines.
 # Line 3 should be "It contains many lines, and there are some things you may want to do with each of them.".
 # Line 11 should be "We also should remember, when we go shopping, to get 4 items: oranges, cheese, bread, olives.".
+sed -E 's/,([^ ])/, \1/g' input.txt
\ No newline at end of file

From dfc88870f804eae98fdccace2c36084d796368ae Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Thu, 12 Mar 2026 23:49:05 +0000
Subject: [PATCH 06/12] completed wc

---
 individual-shell-tools/wc/script-01.sh | 1 +
 individual-shell-tools/wc/script-02.sh | 1 +
 individual-shell-tools/wc/script-03.sh | 1 +
 3 files changed, 3 insertions(+)

diff --git a/individual-shell-tools/wc/script-01.sh b/individual-shell-tools/wc/script-01.sh
index c9dd6e5df..f079e46a0 100755
--- a/individual-shell-tools/wc/script-01.sh
+++ b/individual-shell-tools/wc/script-01.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of words in the file helper-files/helper-3.txt.
 # The output should include the number 19. The output should not include the number 92.
+wc -w < ../helper-files/helper-3.txt
\ No newline at end of file
diff --git a/individual-shell-tools/wc/script-02.sh b/individual-shell-tools/wc/script-02.sh
index 8feeb1a62..86aaca2a5 100755
--- a/individual-shell-tools/wc/script-02.sh
+++ b/individual-shell-tools/wc/script-02.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of lines in the file helper-files/helper-3.txt.
 # The output should include the number 3. The output should not include the number 19.
+wc -l < ../helper-files/helper-3.txt
\ No newline at end of file
diff --git a/individual-shell-tools/wc/script-03.sh b/individual-shell-tools/wc/script-03.sh
index 6b2e9d3d1..e6fdd8699 100755
--- a/individual-shell-tools/wc/script-03.sh
+++ b/individual-shell-tools/wc/script-03.sh
@@ -8,3 +8,4 @@ set -euo pipefail
 #        1       7      39 ../helper-files/helper-2.txt
 #        3      19      92 ../helper-files/helper-3.txt
 #        5      30     151 total
+wc ../helper-files/*
\ No newline at end of file

From f961b0fd67a74dfd4237fc8c0f3d576a28b0982e Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Fri, 13 Mar 2026 00:09:32 +0000
Subject: [PATCH 07/12] awk done

---
 individual-shell-tools/awk/script-01.sh         | 3 ++-
 individual-shell-tools/awk/script-02.sh         | 2 +-
 individual-shell-tools/awk/script-03.sh         | 1 +
 individual-shell-tools/awk/script-04.sh         | 1 +
 individual-shell-tools/awk/script-05.sh         | 2 +-
 individual-shell-tools/awk/script-06-stretch.sh | 2 +-
 individual-shell-tools/awk/script-07-stretch.sh | 2 +-
 7 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/individual-shell-tools/awk/script-01.sh b/individual-shell-tools/awk/script-01.sh
index e75a263cf..2b277885c 100755
--- a/individual-shell-tools/awk/script-01.sh
+++ b/individual-shell-tools/awk/script-01.sh
@@ -5,4 +5,5 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player in `scores-table.txt`.
 # Your output should contain 6 lines, each with just one word on it.
 
-awk '{print $1}' scores-table.txt
+awk '{print $1}' scores-table.txt 
+
diff --git a/individual-shell-tools/awk/script-02.sh b/individual-shell-tools/awk/script-02.sh
index 5559ca2fb..da34660ab 100755
--- a/individual-shell-tools/awk/script-02.sh
+++ b/individual-shell-tools/awk/script-02.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the names of each player, as well as their city.
 # Your output should contain 6 lines, each with two words on it, separated by a space.
-awk '{print $1, $2}' scores-table.txt
\ No newline at end of file
+awk '{print $1, $2}' scores-table.txt
diff --git a/individual-shell-tools/awk/script-03.sh b/individual-shell-tools/awk/script-03.sh
index 55c51c48e..0bd2823d1 100755
--- a/individual-shell-tools/awk/script-03.sh
+++ b/individual-shell-tools/awk/script-03.sh
@@ -6,3 +6,4 @@ set -euo pipefail
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 1".
 awk '{print $1, $3}' scores-table.txt
+
diff --git a/individual-shell-tools/awk/script-04.sh b/individual-shell-tools/awk/script-04.sh
index cecbb0b72..a414e0085 100755
--- a/individual-shell-tools/awk/script-04.sh
+++ b/individual-shell-tools/awk/script-04.sh
@@ -6,3 +6,4 @@ set -euo pipefail
 # Your output should contain 3 lines, each with one word and one number on it.
 # The first line should be "Ahmed 4".
 awk '$2=="London" {print $1, $NF}' scores-table.txt
+
diff --git a/individual-shell-tools/awk/script-05.sh b/individual-shell-tools/awk/script-05.sh
index 49c4e9da5..2013fb981 100755
--- a/individual-shell-tools/awk/script-05.sh
+++ b/individual-shell-tools/awk/script-05.sh
@@ -5,4 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player along with the number of times they've played the game.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 3".
-awk '{count=0; for(i=3;i<=NF;i++) count++; print $1, count}' scores-table.txt
\ No newline at end of file
+awk '{count=0; for(i=3;i<=NF;i++) count++; print $1, count}' scores-table.txt
diff --git a/individual-shell-tools/awk/script-06-stretch.sh b/individual-shell-tools/awk/script-06-stretch.sh
index 5abf1ecfc..4b77a4e5d 100755
--- a/individual-shell-tools/awk/script-06-stretch.sh
+++ b/individual-shell-tools/awk/script-06-stretch.sh
@@ -8,4 +8,4 @@ set -euo pipefail
 # Your output should be exactly the number 54.
 awk '{
   for(i=3;i<=3;i++) total += $i
-} END {print total}' scores-table.txt
\ No newline at end of file
+} END {print total}' scores-table.txt
diff --git a/individual-shell-tools/awk/script-07-stretch.sh b/individual-shell-tools/awk/script-07-stretch.sh
index 485223232..73702a5e5 100755
--- a/individual-shell-tools/awk/script-07-stretch.sh
+++ b/individual-shell-tools/awk/script-07-stretch.sh
@@ -7,4 +7,4 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player along with the total of adding all of that player's scores.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 15". The second line should be "Basia 37"
-awk '{sum=0; for(i=3;i<=NF;i++) sum += $i; print $1, sum}' scores-table.txt
\ No newline at end of file
+awk '{sum=0; for(i=3;i<=NF;i++) sum += $i; print $1, sum}' scores-table.txt

From 7a65b905ebb4b718c48886116d1ae0164efadb6f Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Fri, 13 Mar 2026 00:10:32 +0000
Subject: [PATCH 08/12] cat done

---
 individual-shell-tools/cat/script-01.sh         | 1 +
 individual-shell-tools/cat/script-02.sh         | 1 +
 individual-shell-tools/cat/script-03.sh         | 2 +-
 individual-shell-tools/cat/script-04-stretch.sh | 2 +-
 4 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/individual-shell-tools/cat/script-01.sh b/individual-shell-tools/cat/script-01.sh
index 9e374dc80..c00147d44 100755
--- a/individual-shell-tools/cat/script-01.sh
+++ b/individual-shell-tools/cat/script-01.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output the contents of the helper-1.txt file inside the helper-files directory to the terminal.
 # The output of this command should be "Once upon a time...".
 cyf@MacBookPro individual-shell-tools % cat helper-files/helper-1.txt 
+
diff --git a/individual-shell-tools/cat/script-02.sh b/individual-shell-tools/cat/script-02.sh
index e5ea59278..9bf886440 100755
--- a/individual-shell-tools/cat/script-02.sh
+++ b/individual-shell-tools/cat/script-02.sh
@@ -12,3 +12,4 @@ set -euo pipefail
 # I was tempted to take a bite of it.
 # But this seemed like a bad idea...
 cyf@MacBookPro individual-shell-tools % cat helper-files/helper-*.txt
+
diff --git a/individual-shell-tools/cat/script-03.sh b/individual-shell-tools/cat/script-03.sh
index e778d927e..4bbfd0996 100755
--- a/individual-shell-tools/cat/script-03.sh
+++ b/individual-shell-tools/cat/script-03.sh
@@ -9,4 +9,4 @@ set -euo pipefail
 # 1 It looked delicious.
 # 2 I was tempted to take a bite of it.
 # 3 But this seemed like a bad idea...
-cyf@MacBookPro individual-shell-tools % cat -n helper-files/helper-3.txt
\ No newline at end of file
+cyf@MacBookPro individual-shell-tools % cat -n helper-files/helper-3.txt
diff --git a/individual-shell-tools/cat/script-04-stretch.sh b/individual-shell-tools/cat/script-04-stretch.sh
index b3238d06a..92a62fc7f 100755
--- a/individual-shell-tools/cat/script-04-stretch.sh
+++ b/individual-shell-tools/cat/script-04-stretch.sh
@@ -13,4 +13,4 @@ set -euo pipefail
 # 3 It looked delicious.
 # 4 I was tempted to take a bite of it.
 # 5 But this seemed like a bad idea...
-cyf@MacBookPro individual-shell-tools % cat helper-files/* | nl -v 1 -n ln
\ No newline at end of file
+cyf@MacBookPro individual-shell-tools % cat helper-files/* | nl -v 1 -n ln

From 450273d852971a852107eafb19ef9f472e60b2a6 Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Fri, 13 Mar 2026 00:11:33 +0000
Subject: [PATCH 09/12] gerp done

---
 individual-shell-tools/grep/script-01.sh | 2 +-
 individual-shell-tools/grep/script-02.sh | 2 +-
 individual-shell-tools/grep/script-03.sh | 2 +-
 individual-shell-tools/grep/script-04.sh | 2 +-
 individual-shell-tools/grep/script-05.sh | 1 +
 individual-shell-tools/grep/script-06.sh | 2 +-
 individual-shell-tools/grep/script-07.sh | 2 +-
 7 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/individual-shell-tools/grep/script-01.sh b/individual-shell-tools/grep/script-01.sh
index 41cb0b856..2e212714b 100755
--- a/individual-shell-tools/grep/script-01.sh
+++ b/individual-shell-tools/grep/script-01.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt said by the Doctor.
 # The output should contain 6 lines.
-grep '^Doctor:' dialogue.txt
\ No newline at end of file
+grep '^Doctor:' dialogue.txt
diff --git a/individual-shell-tools/grep/script-02.sh b/individual-shell-tools/grep/script-02.sh
index 381c9cc94..53a4d54db 100755
--- a/individual-shell-tools/grep/script-02.sh
+++ b/individual-shell-tools/grep/script-02.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that contains the word Doctor (regardless of case).
 # The output should contain 9 lines.
-grep -i 'Doctor' dialogue.txt
\ No newline at end of file
+grep -i 'Doctor' dialogue.txt
diff --git a/individual-shell-tools/grep/script-03.sh b/individual-shell-tools/grep/script-03.sh
index 64f0405d0..28b26ad7c 100755
--- a/individual-shell-tools/grep/script-03.sh
+++ b/individual-shell-tools/grep/script-03.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of lines in dialogue.txt that contain the word Doctor (regardless of case).
 # The output should be exactly the number 9.
-grep -i -c 'Doctor' dialogue.txt
\ No newline at end of file
+grep -i -c 'Doctor' dialogue.txt
diff --git a/individual-shell-tools/grep/script-04.sh b/individual-shell-tools/grep/script-04.sh
index db9b57fbd..1a78e82d0 100755
--- a/individual-shell-tools/grep/script-04.sh
+++ b/individual-shell-tools/grep/script-04.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that does not contain the word "Hello" (regardless of case).
 # The output should contain 10 lines.
-grep -v -i 'Hello' dialogue.txt
\ No newline at end of file
+grep -v -i 'Hello' dialogue.txt
diff --git a/individual-shell-tools/grep/script-05.sh b/individual-shell-tools/grep/script-05.sh
index df64a3a38..ac2d56f38 100755
--- a/individual-shell-tools/grep/script-05.sh
+++ b/individual-shell-tools/grep/script-05.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output every line in dialogue.txt that contains the string "cure", as well as the line before that line.
 # The output should contain two pairs of two lines of text (with a separator between them).
 grep -B 1 'cure' dialogue.txt
+
diff --git a/individual-shell-tools/grep/script-06.sh b/individual-shell-tools/grep/script-06.sh
index d4099c8bb..907043ce4 100755
--- a/individual-shell-tools/grep/script-06.sh
+++ b/individual-shell-tools/grep/script-06.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the name of every `.txt` file in this directory which contains a line of dialogue said by the Doctor.
 # The output should contain two filenames.
-grep -h '^Doctor:' dialogue*.txt
\ No newline at end of file
+grep -h '^Doctor:' dialogue*.txt
diff --git a/individual-shell-tools/grep/script-07.sh b/individual-shell-tools/grep/script-07.sh
index 491a4d45f..d9910d8b1 100755
--- a/individual-shell-tools/grep/script-07.sh
+++ b/individual-shell-tools/grep/script-07.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output, for each `.txt` file in this directory, how many lines of dialogue the Doctor has.
 # The output should show that dialogue.txt contains 6 lines, dialogue-2.txt contains 2, and dialogue-3.txt contains 0.
-grep -c '^Doctor:' dialogue*.txt
\ No newline at end of file
+grep -c '^Doctor:' dialogue*.txt

From 73d6725c0f438cf2346a0b6b75f96335c5b00852 Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Fri, 13 Mar 2026 00:12:12 +0000
Subject: [PATCH 10/12] ls done

---
 individual-shell-tools/ls/script-01.sh | 2 +-
 individual-shell-tools/ls/script-02.sh | 2 +-
 individual-shell-tools/ls/script-03.sh | 2 +-
 individual-shell-tools/ls/script-04.sh | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/individual-shell-tools/ls/script-01.sh b/individual-shell-tools/ls/script-01.sh
index 081f2c7c2..72f2fb4a6 100755
--- a/individual-shell-tools/ls/script-01.sh
+++ b/individual-shell-tools/ls/script-01.sh
@@ -13,4 +13,4 @@ fi
 
 # TODO: Write a command to list the files and folders in this directory.
 # The output should be a list of names including child-directory, script-01.sh, script-02.sh, and more.
-ls 
\ No newline at end of file
+ls 
diff --git a/individual-shell-tools/ls/script-02.sh b/individual-shell-tools/ls/script-02.sh
index 9fa05d88b..d37175729 100755
--- a/individual-shell-tools/ls/script-02.sh
+++ b/individual-shell-tools/ls/script-02.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command which lists all of the files in the directory named child-directory.
 # The output should be a list of names: helper-1.txt, helper-2.txt, helper-3.txt.
-ls child-directory
\ No newline at end of file
+ls child-directory
diff --git a/individual-shell-tools/ls/script-03.sh b/individual-shell-tools/ls/script-03.sh
index 7a1a1d315..5161171ec 100755
--- a/individual-shell-tools/ls/script-03.sh
+++ b/individual-shell-tools/ls/script-03.sh
@@ -5,4 +5,4 @@ set -euo pipefail
 # TODO: Write a command which _recursively_ lists all of the files and folders in this directory _and_ all of the files inside those folders.
 # The output should be a list of names including: child-directory, script-01.sh, helper-1.txt (and more).
 # The formatting of the output doesn't matter.
-ls -R
\ No newline at end of file
+ls -R
diff --git a/individual-shell-tools/ls/script-04.sh b/individual-shell-tools/ls/script-04.sh
index 36a997093..eb729270b 100755
--- a/individual-shell-tools/ls/script-04.sh
+++ b/individual-shell-tools/ls/script-04.sh
@@ -21,4 +21,4 @@ echo "Second exercise (sorted oldest to newest):"
 
 # TODO: Write a command which does the same as above, but sorted in the opposite order (oldest first).
 # The output should be a list of names in this order, one per line: helper-2.txt, helper-1.txt, helper-3.txt.
-ls -1tr child-directory
\ No newline at end of file
+ls -1tr child-directory

From 4681b060d37e7664dc734ad3a037e80eab3d6437 Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Fri, 13 Mar 2026 00:13:01 +0000
Subject: [PATCH 11/12] sed done

---
 individual-shell-tools/sed/script-01.sh | 2 +-
 individual-shell-tools/sed/script-02.sh | 2 +-
 individual-shell-tools/sed/script-03.sh | 2 +-
 individual-shell-tools/sed/script-04.sh | 2 +-
 individual-shell-tools/sed/script-05.sh | 2 +-
 individual-shell-tools/sed/script-06.sh | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/individual-shell-tools/sed/script-01.sh b/individual-shell-tools/sed/script-01.sh
index 6255a124b..a29a59701 100755
--- a/individual-shell-tools/sed/script-01.sh
+++ b/individual-shell-tools/sed/script-01.sh
@@ -5,4 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output input.txt with all occurrences of the letter `i` replaced with `I`.
 # The output should contain 11 lines.
 # The first line of the output should be: "ThIs Is a sample fIle for experImentIng wIth sed.".
-sed 's/i/I/g' input.txt
\ No newline at end of file
+sed 's/i/I/g' input.txt
diff --git a/individual-shell-tools/sed/script-02.sh b/individual-shell-tools/sed/script-02.sh
index d3f70b8ce..be485a0af 100755
--- a/individual-shell-tools/sed/script-02.sh
+++ b/individual-shell-tools/sed/script-02.sh
@@ -5,4 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output input.txt with numbers removed.
 # The output should contain 11 lines.
 # Line 6 of the output should be " Alisha".
-sed 's/[0-9]//g' input.txt
\ No newline at end of file
+sed 's/[0-9]//g' input.txt
diff --git a/individual-shell-tools/sed/script-03.sh b/individual-shell-tools/sed/script-03.sh
index 02b29409e..0f5779306 100755
--- a/individual-shell-tools/sed/script-03.sh
+++ b/individual-shell-tools/sed/script-03.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output input.txt removing any line which contains a number.
 # The output should contain 6 lines.
-sed '/[0-9]/d' input.txt
\ No newline at end of file
+sed '/[0-9]/d' input.txt
diff --git a/individual-shell-tools/sed/script-04.sh b/individual-shell-tools/sed/script-04.sh
index 478211422..781898523 100755
--- a/individual-shell-tools/sed/script-04.sh
+++ b/individual-shell-tools/sed/script-04.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output input.txt replacing every occurrence of the string "We'll" with "We will".
 # The output should contain 11 lines.
-sed "s/We'll/We will/g" input.txt
\ No newline at end of file
+sed "s/We'll/We will/g" input.txt
diff --git a/individual-shell-tools/sed/script-05.sh b/individual-shell-tools/sed/script-05.sh
index 6f1b7cba0..68582b6b8 100755
--- a/individual-shell-tools/sed/script-05.sh
+++ b/individual-shell-tools/sed/script-05.sh
@@ -6,4 +6,4 @@ set -euo pipefail
 # If a line starts with a number and a space, make the line instead end with a space and the number.
 # So line 6 which currently reads "37 Alisha" should instead read "Alisha 37".
 # The output should contain 11 lines.
-sed -E 's/^([0-9]+) (.*)/\2 \1/' input.txt
\ No newline at end of file
+sed -E 's/^([0-9]+) (.*)/\2 \1/' input.txt
diff --git a/individual-shell-tools/sed/script-06.sh b/individual-shell-tools/sed/script-06.sh
index 83a2adf02..c5eed9037 100755
--- a/individual-shell-tools/sed/script-06.sh
+++ b/individual-shell-tools/sed/script-06.sh
@@ -8,4 +8,4 @@ set -euo pipefail
 # The output should contain 11 lines.
 # Line 3 should be "It contains many lines, and there are some things you may want to do with each of them.".
 # Line 11 should be "We also should remember, when we go shopping, to get 4 items: oranges, cheese, bread, olives.".
-sed -E 's/,([^ ])/, \1/g' input.txt
\ No newline at end of file
+sed -E 's/,([^ ])/, \1/g' input.txt

From e32e39ef1642df2cc39c026dc3ff5b33dda357ee Mon Sep 17 00:00:00 2001
From: ZabihollahNamazi <zabihnamazi@gmail.com>
Date: Fri, 13 Mar 2026 00:13:37 +0000
Subject: [PATCH 12/12] wc done

---
 individual-shell-tools/wc/script-01.sh | 2 +-
 individual-shell-tools/wc/script-02.sh | 2 +-
 individual-shell-tools/wc/script-03.sh | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/individual-shell-tools/wc/script-01.sh b/individual-shell-tools/wc/script-01.sh
index f079e46a0..e170e19df 100755
--- a/individual-shell-tools/wc/script-01.sh
+++ b/individual-shell-tools/wc/script-01.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of words in the file helper-files/helper-3.txt.
 # The output should include the number 19. The output should not include the number 92.
-wc -w < ../helper-files/helper-3.txt
\ No newline at end of file
+wc -w < ../helper-files/helper-3.txt
diff --git a/individual-shell-tools/wc/script-02.sh b/individual-shell-tools/wc/script-02.sh
index 86aaca2a5..313c332e8 100755
--- a/individual-shell-tools/wc/script-02.sh
+++ b/individual-shell-tools/wc/script-02.sh
@@ -4,4 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of lines in the file helper-files/helper-3.txt.
 # The output should include the number 3. The output should not include the number 19.
-wc -l < ../helper-files/helper-3.txt
\ No newline at end of file
+wc -l < ../helper-files/helper-3.txt
diff --git a/individual-shell-tools/wc/script-03.sh b/individual-shell-tools/wc/script-03.sh
index e6fdd8699..6ac2210dd 100755
--- a/individual-shell-tools/wc/script-03.sh
+++ b/individual-shell-tools/wc/script-03.sh
@@ -8,4 +8,4 @@ set -euo pipefail
 #        1       7      39 ../helper-files/helper-2.txt
 #        3      19      92 ../helper-files/helper-3.txt
 #        5      30     151 total
-wc ../helper-files/*
\ No newline at end of file
+wc ../helper-files/*