individual shell tools

TarasMykytiuk · TarasMykytiuk · commit 726a0d41a15c · 2026-03-16T00:06:11.000+02:00
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
 
+
 # TODO: Write a command to output just the names of each player in `scores-table.txt`.
+awk '{print $1}' 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
@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output the names of each player, as well as their city.
+awk '{print $1, $2}' scores-table.txt
 # 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
@@ -3,5 +3,6 @@
 set -euo pipefail
 
 # TODO: Write a command to output just the names of each player along with the score from their first attempt.
+awk '{print $1, $3}' scores-table.txt
 # 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
@@ -3,5 +3,6 @@
 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.
+awk '$2 == "London" {print $1, $NF}' scores-table.txt
 # 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
@@ -3,5 +3,6 @@
 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.
+awk '{columns_num = NF - 2; print $1, columns_num }' scores-table.txt
 # 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
@@ -3,6 +3,6 @@
 set -euo pipefail
 
 # NOTE: This is a stretch exercise - it is optional.
-
 # TODO: Write a command to output the total of adding together all players' first scores.
+awk '{sum += $3} END {print sum}' scores-table.txt
 # Your output should be exactly the number 54.
diff --git a/individual-shell-tools/awk/script-07-stretch.sh b/individual-shell-tools/awk/script-07-stretch.sh
@@ -3,7 +3,7 @@
 set -euo pipefail
 
 # NOTE: This is a stretch exercise - it is optional.
-
+awk '{sum=o; for(i=3; i<=NF; i++) sum+=$i; print $1, sum}' scores-table.txt
 # 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"
diff --git a/individual-shell-tools/cat/script-01.sh b/individual-shell-tools/cat/script-01.sh
@@ -3,4 +3,5 @@
 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.
+cat ../helper-files/helper-1.txt
 # 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
@@ -4,7 +4,7 @@ set -euo pipefail
 
 # 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.
-#
+cat ../helper-files/*
 # The output of this command should be:
 # Once upon a time...
 # There was a house made of gingerbread.
diff --git a/individual-shell-tools/cat/script-03.sh b/individual-shell-tools/cat/script-03.sh
@@ -4,7 +4,7 @@ set -euo pipefail
 
 # 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.
-#
+cat ../helper-files/helper-3.txt | nl
 # The output of this command should be something like:
 # 1 It looked delicious.
 # 2 I was tempted to take a bite of it.
diff --git a/individual-shell-tools/cat/script-04-stretch.sh b/individual-shell-tools/cat/script-04-stretch.sh
@@ -6,7 +6,7 @@ set -euo pipefail
 
 # TODO: Write a command to output the contents of all of the files in the helper-files directory to the terminal.
 # We also want to see the line numbers in the output, but we want line numbers not to reset at the start of each file.
-#
+cat ../helper-files/* | nl
 # The output of this command should be something like:
 # 1 Once upon a time...
 # 2 There was a house made of gingerbread.
diff --git a/individual-shell-tools/grep/script-01.sh b/individual-shell-tools/grep/script-01.sh
@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt said by the Doctor.
+grep  "^Doctor:" dialogue.txt
 # The output should contain 6 lines.
diff --git a/individual-shell-tools/grep/script-02.sh b/individual-shell-tools/grep/script-02.sh
@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that contains the word Doctor (regardless of case).
+grep  -i "Doctor" dialogue.txt
 # The output should contain 9 lines.
diff --git a/individual-shell-tools/grep/script-03.sh b/individual-shell-tools/grep/script-03.sh
@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output the number of lines in dialogue.txt that contain the word Doctor (regardless of case).
+grep  -c -i "Doctor" dialogue.txt
 # 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
@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that does not contain the word "Hello" (regardless of case).
+grep  -v -i "Hello" dialogue.txt
 # The output should contain 10 lines.
diff --git a/individual-shell-tools/grep/script-05.sh b/individual-shell-tools/grep/script-05.sh
@@ -3,4 +3,5 @@
 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.
+grep -B 1 "cure" dialogue.txt
 # 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
@@ -3,4 +3,5 @@
 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.
+grep -l "Doctor:" *.txt
 # The output should contain two filenames.
diff --git a/individual-shell-tools/grep/script-07.sh b/individual-shell-tools/grep/script-07.sh
@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output, for each `.txt` file in this directory, how many lines of dialogue the Doctor has.
+grep -i -c "Doctor:" *.txt
 # 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/sed/script-01.sh b/individual-shell-tools/sed/script-01.sh
@@ -3,5 +3,6 @@
 set -euo pipefail
 
 # TODO: Write a command to output input.txt with all occurrences of the letter `i` replaced with `I`.
+sed 's/i/I/g' input.txt
 # The output should contain 11 lines.
 # The first line of the output should be: "ThIs Is a sample fIle for experImentIng wIth sed.".
diff --git a/individual-shell-tools/sed/script-02.sh b/individual-shell-tools/sed/script-02.sh
@@ -3,5 +3,6 @@
 set -euo pipefail
 
 # TODO: Write a command to output input.txt with numbers removed.
+sed 's/[0-9]//g' input.txt
 # The output should contain 11 lines.
 # Line 6 of the output should be " Alisha".
diff --git a/individual-shell-tools/sed/script-03.sh b/individual-shell-tools/sed/script-03.sh
@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output input.txt removing any line which contains a number.
+sed '/[0-9]/d' input.txt
 # The output should contain 6 lines.
diff --git a/individual-shell-tools/sed/script-04.sh b/individual-shell-tools/sed/script-04.sh
@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output input.txt replacing every occurrence of the string "We'll" with "We will".
+sed "s/We'll/We will/g" input.txt
 # The output should contain 11 lines.
diff --git a/individual-shell-tools/sed/script-05.sh b/individual-shell-tools/sed/script-05.sh
@@ -3,6 +3,7 @@
 set -euo pipefail
 
 # TODO: Write a command to output input.txt with one change:
+sed -E 's/^([0-9]+) (.*)/\2 \1/g' input.txt
 # 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.
diff --git a/individual-shell-tools/sed/script-06.sh b/individual-shell-tools/sed/script-06.sh
@@ -3,6 +3,7 @@
 set -euo pipefail
 
 # TODO: Write a command to output input.txt with one fix:
+sed 's/,\([^ ]\)/, \1/g' input.txt
 # If a comma in input.txt is not followed by a space, add a space after.
 # If there is already a space after a comma, do not add an additional space.
 # The output should contain 11 lines.
diff --git a/individual-shell-tools/wc/script-01.sh b/individual-shell-tools/wc/script-01.sh
@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output the number of words in the file helper-files/helper-3.txt.
+wc -w ../helper-files/helper-3.txt
 # The output should include the number 19. The output should not include the number 92.
diff --git a/individual-shell-tools/wc/script-02.sh b/individual-shell-tools/wc/script-02.sh
@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output the number of lines in the file helper-files/helper-3.txt.
+wc -l ../helper-files/helper-3.txt
 # The output should include the number 3. The output should not include the number 19.
diff --git a/individual-shell-tools/wc/script-03.sh b/individual-shell-tools/wc/script-03.sh
@@ -3,6 +3,7 @@
 set -euo pipefail
 
 # TODO: Write a command to output the number of lines, words, and characters in all of the files inside the helper-files directory.
+wc -l -w -c ../helper-files/*
 # The output should be something like:
 #        1       4      20 ../helper-files/helper-1.txt
 #        1       7      39 ../helper-files/helper-2.txt
