London | 26-SDC-Mar | Mariia Serhiienko | Sprint 1 | Individual shell tools

individual-shell-tools/awk/script-01.sh

@@ -4,3 +4,4 @@ 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

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

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

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

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 '{ print $1, NF-2 }' scores-table.txt

individual-shell-tools/awk/script-06-stretch.sh

@@ -6,3 +6,4 @@ 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 '{ sum += $3 } END { print sum }' scores-table.txt

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

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...".

individual-shell-tools/cat/script-02.sh

@@ -3,6 +3,7 @@
 set -euo pipefail
 
 # TODO: Write a command to output the contents of all of the files inside the helper-files directory to the terminal.
+cat helper-files/*
 # Make sure you are only calling `cat` once.
 #
 # The output of this command should be:

individual-shell-tools/cat/script-03.sh

@@ -3,6 +3,7 @@
 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.
+cat -n helper-files/helper-3.txt
 # This time, we also want to see the line numbers in the output.
 #
 # The output of this command should be something like:

individual-shell-tools/cat/script-04-stretch.sh

@@ -5,6 +5,7 @@ set -euo pipefail
 # 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.
+cat -n helper-files/*
 # 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.
 #
 # The output of this command should be something like:

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.

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 -iw 'doctor' dialogue.txt
 # The output should contain 9 lines.

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 -iw 'doctor' dialogue.txt | wc -l
 # The output should be exactly the number 9.

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 -ivw 'hello' dialogue.txt
 # The output should contain 10 lines.

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).

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.

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 -c '^Doctor:' dialogue.txt dialogue-2.txt dialogue-3.txt
 # The output should show that dialogue.txt contains 6 lines, dialogue-2.txt contains 2, and dialogue-3.txt contains 0.

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.

individual-shell-tools/ls/script-02.sh

@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command which lists all of the files in the directory named child-directory.
+ls child-directory
 # The output should be a list of names: helper-1.txt, helper-2.txt, helper-3.txt.

individual-shell-tools/ls/script-03.sh

@@ -3,5 +3,6 @@
 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.
+ls -R
 # 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.

individual-shell-tools/ls/script-04.sh

@@ -14,10 +14,12 @@ touch "${script_dir}/child-directory/helper-3.txt"
 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.
+ls -lt child-directory
 # 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):"
 
 # TODO: Write a command which does the same as above, but sorted in the opposite order (oldest first).
+ls -ltr child-directory
 # The output should be a list of names in this order, one per line: helper-2.txt, helper-1.txt, helper-3.txt.

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.".

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".

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.

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.

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

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

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.

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.

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 -lwm helper-files/*
 # The output should be something like:
 #        1       4      20 ../helper-files/helper-1.txt
 #        1       7      39 ../helper-files/helper-2.txt