complete individual shell tools exercises

Abubakar-Meigag · Abubakar-Meigag · commit 5ea068a756ac · 2026-03-11T16:54:38.000Z
diff --git a/individual-shell-tools/awk/script-01.sh b/individual-shell-tools/awk/script-01.sh
@@ -2,5 +2,7 @@
 
 set -euo pipefail
 
+awk '{print NF}' scores-table.txt
+
 # 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.
diff --git a/individual-shell-tools/awk/script-02.sh b/individual-shell-tools/awk/script-02.sh
@@ -2,5 +2,7 @@
 
 set -euo pipefail
 
+awk '{print $1, $2}' scores-table.txt
+
 # 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.
diff --git a/individual-shell-tools/awk/script-03.sh b/individual-shell-tools/awk/script-03.sh
@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+awk '{print $1, $3}' scores-table.txt
+
 # 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".
diff --git a/individual-shell-tools/awk/script-04.sh b/individual-shell-tools/awk/script-04.sh
@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+awk '/London/ {print $1, $4}' scores-table.txt
+
 # 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".
diff --git a/individual-shell-tools/awk/script-05.sh b/individual-shell-tools/awk/script-05.sh
@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+awk '{print $1, NF-2}' scores-table.txt
+
 # 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".
diff --git a/individual-shell-tools/awk/script-06-stretch.sh b/individual-shell-tools/awk/script-06-stretch.sh
@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+awk '{sum += $3} END {print sum}' scores-table.txt
+
 # NOTE: This is a stretch exercise - it is optional.
 
 # TODO: Write a command to output the total of adding together all players' first scores.
diff --git a/individual-shell-tools/awk/script-07-stretch.sh b/individual-shell-tools/awk/script-07-stretch.sh
@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+awk '{for (i=3; i<=NF; i++) sum[$1] += $i} END {for (name in sum) print name, sum[name]}' scores-table.txt
+
 # NOTE: This is a stretch exercise - it is optional.
 
 # TODO: Write a command to output just the names of each player along with the total of adding all of that player's scores.
diff --git a/individual-shell-tools/cat/script-01.sh b/individual-shell-tools/cat/script-01.sh
@@ -2,5 +2,7 @@
 
 set -euo pipefail
 
+cat ../helper-files/helper-1.txt
+
 # 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...".
diff --git a/individual-shell-tools/cat/script-02.sh b/individual-shell-tools/cat/script-02.sh
@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+cat ../helper-files/*.txt
+
 # TODO: Write a command to output the contents of all of the files inside the helper-files directory to the terminal.
 # Make sure you are only calling `cat` once.
 #
diff --git a/individual-shell-tools/cat/script-03.sh b/individual-shell-tools/cat/script-03.sh
@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+cat -n ../helper-files/helper-3.txt
+
 # TODO: Write a command to output the contents of the file `helper-3.txt` inside the helper-files directory to the terminal.
 # This time, we also want to see the line numbers in the output.
 #
diff --git a/individual-shell-tools/cat/script-04-stretch.sh b/individual-shell-tools/cat/script-04-stretch.sh
@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+cat ../helper-files/*.txt | nl
+
 # NOTE: This is a stretch exercise - it is optional.
 
 # TODO: Write a command to output the contents of all of the files in the helper-files directory to the terminal.
diff --git a/individual-shell-tools/grep/script-01.sh b/individual-shell-tools/grep/script-01.sh
@@ -2,5 +2,7 @@
 
 set -euo pipefail
 
+grep "^Doctor:" dialogue.txt
+
 # TODO: Write a command to output every line in dialogue.txt said by the Doctor.
 # The output should contain 6 lines.
diff --git a/individual-shell-tools/grep/script-02.sh b/individual-shell-tools/grep/script-02.sh
@@ -2,5 +2,7 @@
 
 set -euo pipefail
 
+grep -i "Doctor" dialogue.txt
+
 # 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.
diff --git a/individual-shell-tools/grep/script-03.sh b/individual-shell-tools/grep/script-03.sh
@@ -2,5 +2,7 @@
 
 set -euo pipefail
 
+grep -c -i "Doctor" dialogue.txt
+
 # 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.
diff --git a/individual-shell-tools/grep/script-04.sh b/individual-shell-tools/grep/script-04.sh
@@ -2,5 +2,8 @@
 
 set -euo pipefail
 
+
+grep -v "Hello" dialogue.txt
+
 # 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.
diff --git a/individual-shell-tools/grep/script-05.sh b/individual-shell-tools/grep/script-05.sh
@@ -2,5 +2,7 @@
 
 set -euo pipefail
 
+grep -B 1 "cure" dialogue.txt
+
 # 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).
diff --git a/individual-shell-tools/grep/script-06.sh b/individual-shell-tools/grep/script-06.sh
@@ -2,5 +2,7 @@
 
 set -euo pipefail
 
+grep -l "Doctor:" *.txt
+
 # 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.
diff --git a/individual-shell-tools/grep/script-07.sh b/individual-shell-tools/grep/script-07.sh
@@ -2,5 +2,7 @@
 
 set -euo pipefail
 
+grep -c -i "^Doctor:" *.txt
+
 # 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.
diff --git a/individual-shell-tools/ls/script-01.sh b/individual-shell-tools/ls/script-01.sh
@@ -13,3 +13,5 @@ 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 ../ls
diff --git a/individual-shell-tools/ls/script-02.sh b/individual-shell-tools/ls/script-02.sh
@@ -4,3 +4,5 @@ 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 ../ls/child-directory
diff --git 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 ../ls ../ls/child-directory 
diff --git a/individual-shell-tools/ls/script-04.sh b/individual-shell-tools/ls/script-04.sh
@@ -12,12 +12,12 @@ sleep 1
 touch "${script_dir}/child-directory/helper-3.txt"
 
 echo "First exercise (sorted newest to oldest):"
-
+ls -t ../ls/child-directory
 # 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.
 
 
 echo "Second exercise (sorted oldest to newest):"
-
+ls -tr ../ls/child-directory
 # 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.
diff --git 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
diff --git a/individual-shell-tools/sed/script-02.sh b/individual-shell-tools/sed/script-02.sh
@@ -5,3 +5,6 @@ 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
diff --git 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
diff --git 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
diff --git 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]+) (.*)/\2 \1/' input.txt
diff --git 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 's/,\([^ ]\)/, \1/g' input.txt
diff --git a/individual-shell-tools/wc/script-01.sh b/individual-shell-tools/wc/script-01.sh
@@ -4,3 +4,6 @@ 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
diff --git 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
diff --git 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/*

Original file line number	Diff line number	Diff line change
`@@ -2,6 +2,8 @@`
`2`	`2`
`3`	`3`	`set -euo pipefail`
`4`	`4`
	`5`	`+cat ../helper-files/*.txt`
	`6`	`+`
`5`	`7`	`# TODO: Write a command to output the contents of all of the files inside the helper-files directory to the terminal.`
`6`	`8`	# Make sure you are only calling `cat` once.
`7`	`9`	`#`
Original file line number	Diff line number	Diff line change
`@@ -2,6 +2,8 @@`
`2`	`2`
`3`	`3`	`set -euo pipefail`
`4`	`4`
	`5`	`+cat -n ../helper-files/helper-3.txt`
	`6`	`+`
`5`	`7`	# TODO: Write a command to output the contents of the file `helper-3.txt` inside the helper-files directory to the terminal.
`6`	`8`	`# This time, we also want to see the line numbers in the output.`
`7`	`9`	`#`