From e7349bfbaaced3da026a316e1f43b6fee2524ea7 Mon Sep 17 00:00:00 2001 From: TzeMingHo Date: Thu, 12 Mar 2026 12:49:08 +0000 Subject: [PATCH 1/8] completed ls exercises --- individual-shell-tools/ls/script-01.sh | 1 + individual-shell-tools/ls/script-02.sh | 2 ++ individual-shell-tools/ls/script-03.sh | 2 ++ individual-shell-tools/ls/script-04.sh | 4 +++- 4 files changed, 8 insertions(+), 1 deletion(-) diff --git a/individual-shell-tools/ls/script-01.sh b/individual-shell-tools/ls/script-01.sh index 241b62f5e..044af3619 100755 --- a/individual-shell-tools/ls/script-01.sh +++ b/individual-shell-tools/ls/script-01.sh @@ -12,4 +12,5 @@ if [[ "${script_dir}" != "$(pwd)" ]]; then fi # TODO: Write a command to list the files and folders in this directory. +ls # The output should be a list of names including child-directory, script-01.sh, script-02.sh, and more. diff --git a/individual-shell-tools/ls/script-02.sh b/individual-shell-tools/ls/script-02.sh index d0a5a10f4..7c8e1ffa7 100755 --- a/individual-shell-tools/ls/script-02.sh +++ b/individual-shell-tools/ls/script-02.sh @@ -3,4 +3,6 @@ set -euo pipefail # TODO: Write a command which lists all of the files in the directory named child-directory. + +ls -R ./child-directory # The output should be a list of names: helper-1.txt, helper-2.txt, helper-3.txt. diff --git a/individual-shell-tools/ls/script-03.sh b/individual-shell-tools/ls/script-03.sh index 781216d21..8ca91a924 100755 --- a/individual-shell-tools/ls/script-03.sh +++ b/individual-shell-tools/ls/script-03.sh @@ -5,3 +5,5 @@ 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..8c0fa2430 100755 --- a/individual-shell-tools/ls/script-04.sh +++ b/individual-shell-tools/ls/script-04.sh @@ -15,9 +15,11 @@ 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 -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 9d202d25cc953afec62704627f4a0cac6e70a6cc Mon Sep 17 00:00:00 2001 From: TzeMingHo Date: Thu, 12 Mar 2026 13:17:27 +0000 Subject: [PATCH 2/8] completed cat exercises --- individual-shell-tools/cat/script-01.sh | 1 + individual-shell-tools/cat/script-02.sh | 2 ++ individual-shell-tools/cat/script-03.sh | 2 ++ individual-shell-tools/cat/script-04-stretch.sh | 2 ++ 4 files changed, 7 insertions(+) diff --git a/individual-shell-tools/cat/script-01.sh b/individual-shell-tools/cat/script-01.sh index c85053e0f..d98bf0ed5 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...". +cd ../helper-files && cat helper-1.txt \ No newline at end of file diff --git a/individual-shell-tools/cat/script-02.sh b/individual-shell-tools/cat/script-02.sh index 01bbd5eab..7f3484a94 100755 --- a/individual-shell-tools/cat/script-02.sh +++ b/individual-shell-tools/cat/script-02.sh @@ -11,3 +11,5 @@ set -euo pipefail # It looked delicious. # I was tempted to take a bite of it. # But this seemed like a bad idea... + +cd ../helper-files && cat *.txt \ No newline at end of file diff --git a/individual-shell-tools/cat/script-03.sh b/individual-shell-tools/cat/script-03.sh index 37573b0c1..d80a2deb4 100755 --- a/individual-shell-tools/cat/script-03.sh +++ b/individual-shell-tools/cat/script-03.sh @@ -9,3 +9,5 @@ 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... + +cd ../helper-files && cat -n 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..76700af0e 100755 --- a/individual-shell-tools/cat/script-04-stretch.sh +++ b/individual-shell-tools/cat/script-04-stretch.sh @@ -13,3 +13,5 @@ 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... + +cd ../helper-files && cat -n *.txt \ No newline at end of file From e026f28a158a3f8fb8260094398af85ad70652c9 Mon Sep 17 00:00:00 2001 From: TzeMingHo Date: Thu, 12 Mar 2026 13:35:44 +0000 Subject: [PATCH 3/8] completed wc exercises --- 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, 6 insertions(+) diff --git a/individual-shell-tools/wc/script-01.sh b/individual-shell-tools/wc/script-01.sh index c9dd6e5df..22b7b8d9e 100755 --- a/individual-shell-tools/wc/script-01.sh +++ b/individual-shell-tools/wc/script-01.sh @@ -4,3 +4,5 @@ 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..8874591e5 100755 --- a/individual-shell-tools/wc/script-02.sh +++ b/individual-shell-tools/wc/script-02.sh @@ -4,3 +4,5 @@ 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..3bc287a1a 100755 --- a/individual-shell-tools/wc/script-03.sh +++ b/individual-shell-tools/wc/script-03.sh @@ -8,3 +8,5 @@ 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/*.txt \ No newline at end of file From 709bd7d6c28ee9ef48f32b6b6d76c5b94baa8c2e Mon Sep 17 00:00:00 2001 From: TzeMingHo Date: Thu, 12 Mar 2026 13:39:43 +0000 Subject: [PATCH 4/8] updated answers of cat exercises --- individual-shell-tools/cat/script-01.sh | 2 +- individual-shell-tools/cat/script-02.sh | 2 +- individual-shell-tools/cat/script-03.sh | 2 +- individual-shell-tools/cat/script-04-stretch.sh | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/individual-shell-tools/cat/script-01.sh b/individual-shell-tools/cat/script-01.sh index d98bf0ed5..94ceeb4fe 100755 --- a/individual-shell-tools/cat/script-01.sh +++ b/individual-shell-tools/cat/script-01.sh @@ -4,4 +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...". -cd ../helper-files && cat helper-1.txt \ No newline at end of file +cat ../helper-files/helper-1.txt \ No newline at end of file diff --git a/individual-shell-tools/cat/script-02.sh b/individual-shell-tools/cat/script-02.sh index 7f3484a94..f645a1aff 100755 --- a/individual-shell-tools/cat/script-02.sh +++ b/individual-shell-tools/cat/script-02.sh @@ -12,4 +12,4 @@ set -euo pipefail # I was tempted to take a bite of it. # But this seemed like a bad idea... -cd ../helper-files && cat *.txt \ No newline at end of file +cat ../helper-files/*.txt \ No newline at end of file diff --git a/individual-shell-tools/cat/script-03.sh b/individual-shell-tools/cat/script-03.sh index d80a2deb4..e4e7c7fe3 100755 --- a/individual-shell-tools/cat/script-03.sh +++ b/individual-shell-tools/cat/script-03.sh @@ -10,4 +10,4 @@ set -euo pipefail # 2 I was tempted to take a bite of it. # 3 But this seemed like a bad idea... -cd ../helper-files && cat -n helper-3.txt \ No newline at end of file +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 76700af0e..ca99a6e27 100755 --- a/individual-shell-tools/cat/script-04-stretch.sh +++ b/individual-shell-tools/cat/script-04-stretch.sh @@ -14,4 +14,4 @@ set -euo pipefail # 4 I was tempted to take a bite of it. # 5 But this seemed like a bad idea... -cd ../helper-files && cat -n *.txt \ No newline at end of file +cat -n ../helper-files/*.txt \ No newline at end of file From 19b4517b11dc84fb5d44328dffc73fd24f82f161 Mon Sep 17 00:00:00 2001 From: TzeMingHo Date: Thu, 12 Mar 2026 13:59:00 +0000 Subject: [PATCH 5/8] answering grep exercises --- individual-shell-tools/grep/script-01.sh | 2 ++ 1 file changed, 2 insertions(+) diff --git a/individual-shell-tools/grep/script-01.sh b/individual-shell-tools/grep/script-01.sh index fb05f42f2..acf8b4a96 100755 --- a/individual-shell-tools/grep/script-01.sh +++ b/individual-shell-tools/grep/script-01.sh @@ -4,3 +4,5 @@ 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 From e830b6e293f38e0de7800e431e2d441ad5be79e7 Mon Sep 17 00:00:00 2001 From: TzeMingHo Date: Thu, 12 Mar 2026 16:08:25 +0000 Subject: [PATCH 6/8] completed grep exercises --- 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 | 2 ++ individual-shell-tools/grep/script-06.sh | 2 ++ individual-shell-tools/grep/script-07.sh | 2 ++ 6 files changed, 12 insertions(+) diff --git a/individual-shell-tools/grep/script-02.sh b/individual-shell-tools/grep/script-02.sh index df6f85640..f376969c2 100755 --- a/individual-shell-tools/grep/script-02.sh +++ b/individual-shell-tools/grep/script-02.sh @@ -4,3 +4,5 @@ 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..85ab1c0cc 100755 --- a/individual-shell-tools/grep/script-03.sh +++ b/individual-shell-tools/grep/script-03.sh @@ -4,3 +4,5 @@ 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 -ic 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..6d6e9cccf 100755 --- a/individual-shell-tools/grep/script-04.sh +++ b/individual-shell-tools/grep/script-04.sh @@ -4,3 +4,5 @@ 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 -iv '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..f310543f3 100755 --- a/individual-shell-tools/grep/script-05.sh +++ b/individual-shell-tools/grep/script-05.sh @@ -4,3 +4,5 @@ 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 \ No newline at end of file diff --git a/individual-shell-tools/grep/script-06.sh b/individual-shell-tools/grep/script-06.sh index 5670e3b6c..9945f84cb 100755 --- a/individual-shell-tools/grep/script-06.sh +++ b/individual-shell-tools/grep/script-06.sh @@ -4,3 +4,5 @@ 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 -l ^Doctor: *.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..4ecc0a584 100755 --- a/individual-shell-tools/grep/script-07.sh +++ b/individual-shell-tools/grep/script-07.sh @@ -4,3 +4,5 @@ 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 *.txt \ No newline at end of file From bd5707e1867edb8e1a30e64a5c1c07f2cbc63cee Mon Sep 17 00:00:00 2001 From: TzeMingHo Date: Thu, 12 Mar 2026 17:11:06 +0000 Subject: [PATCH 7/8] completed sed exercises --- 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, 12 insertions(+) diff --git a/individual-shell-tools/sed/script-01.sh b/individual-shell-tools/sed/script-01.sh index d592970fc..ea588885f 100755 --- a/individual-shell-tools/sed/script-01.sh +++ b/individual-shell-tools/sed/script-01.sh @@ -5,3 +5,5 @@ 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..f9df0c5c9 100755 --- a/individual-shell-tools/sed/script-02.sh +++ b/individual-shell-tools/sed/script-02.sh @@ -5,3 +5,5 @@ 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 -E 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..f7bbacfce 100755 --- a/individual-shell-tools/sed/script-03.sh +++ b/individual-shell-tools/sed/script-03.sh @@ -4,3 +4,5 @@ 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..ae19f6735 100755 --- a/individual-shell-tools/sed/script-04.sh +++ b/individual-shell-tools/sed/script-04.sh @@ -4,3 +4,5 @@ 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..5d4fd8d5a 100755 --- a/individual-shell-tools/sed/script-05.sh +++ b/individual-shell-tools/sed/script-05.sh @@ -6,3 +6,5 @@ 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]+) (\w+)/\2 \1/g" 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..b04650ee3 100755 --- a/individual-shell-tools/sed/script-06.sh +++ b/individual-shell-tools/sed/script-06.sh @@ -8,3 +8,5 @@ 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/,(\w+)/, \1/g" input.txt \ No newline at end of file From 5a924f002546565b51f0d489d8671361726597b5 Mon Sep 17 00:00:00 2001 From: TzeMingHo Date: Thu, 12 Mar 2026 18:28:46 +0000 Subject: [PATCH 8/8] completed awk exercises --- individual-shell-tools/awk/script-01.sh | 2 ++ individual-shell-tools/awk/script-02.sh | 2 ++ individual-shell-tools/awk/script-03.sh | 2 ++ individual-shell-tools/awk/script-04.sh | 2 ++ 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, 14 insertions(+) diff --git a/individual-shell-tools/awk/script-01.sh b/individual-shell-tools/awk/script-01.sh index 8db4390af..587ed2acb 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 \ No newline at end of file diff --git a/individual-shell-tools/awk/script-02.sh b/individual-shell-tools/awk/script-02.sh index 5956be9bd..c8e81537b 100755 --- a/individual-shell-tools/awk/script-02.sh +++ b/individual-shell-tools/awk/script-02.sh @@ -4,3 +4,5 @@ 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..67365bfa4 100755 --- a/individual-shell-tools/awk/script-03.sh +++ b/individual-shell-tools/awk/script-03.sh @@ -5,3 +5,5 @@ 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 \ No newline at end of file diff --git a/individual-shell-tools/awk/script-04.sh b/individual-shell-tools/awk/script-04.sh index bf15703c7..2be87d21f 100755 --- a/individual-shell-tools/awk/script-04.sh +++ b/individual-shell-tools/awk/script-04.sh @@ -5,3 +5,5 @@ 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 \ No newline at end of file diff --git a/individual-shell-tools/awk/script-05.sh b/individual-shell-tools/awk/script-05.sh index d1680cb02..965155cdc 100755 --- a/individual-shell-tools/awk/script-05.sh +++ b/individual-shell-tools/awk/script-05.sh @@ -5,3 +5,5 @@ 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(column=3; column<=NF; column++) 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..25869fc28 100755 --- a/individual-shell-tools/awk/script-06-stretch.sh +++ b/individual-shell-tools/awk/script-06-stretch.sh @@ -6,3 +6,5 @@ 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 '{ totalFirstScores+=$3; } END {print totalFirstScores}' scores-table.txt \ No newline at end of file diff --git a/individual-shell-tools/awk/script-07-stretch.sh b/individual-shell-tools/awk/script-07-stretch.sh index 3f7155880..bf7072e59 100755 --- a/individual-shell-tools/awk/script-07-stretch.sh +++ b/individual-shell-tools/awk/script-07-stretch.sh @@ -7,3 +7,5 @@ set -euo pipefail # TODO: Write a command to output just the names of each player along with the total of adding all of that player's scores. # Your output should contain 6 lines, each with one word and one number on it. # The first line should be "Ahmed 15". The second line should be "Basia 37" + +awk '{ scores=0; for(column=3; column<=NF; column++) scores+=$column; print $1, scores}' scores-table.txt \ No newline at end of file