diff --git a/individual-shell-tools/awk/script-01.sh b/individual-shell-tools/awk/script-01.sh index 8db4390a..e33ee9a5 100755 --- a/individual-shell-tools/awk/script-01.sh +++ b/individual-shell-tools/awk/script-01.sh @@ -3,4 +3,5 @@ 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 index 5956be9b..a71a9031 100755 --- 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 index af7c6e8b..c249fea2 100755 --- 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 index bf15703c..abcfa459 100755 --- 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 index d1680cb0..f84b16b3 100755 --- 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 '{print $1,NF-2}' 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 index 0201e637..89fa135b 100755 --- a/individual-shell-tools/awk/script-06-stretch.sh +++ b/individual-shell-tools/awk/script-06-stretch.sh @@ -5,4 +5,5 @@ 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+= $3} END {print sum}' scores-table.txt # Your output should be exactly the number 54. diff --git a/individual-shell-tools/awk/script-07-stretch.sh b/individual-shell-tools/awk/script-07-stretch.sh index 3f715588..55981734 100755 --- a/individual-shell-tools/awk/script-07-stretch.sh +++ b/individual-shell-tools/awk/script-07-stretch.sh @@ -5,5 +5,6 @@ set -euo pipefail # NOTE: This is a stretch exercise - it is optional. # TODO: Write a command to output just the names of each player along with the total of adding all of that player's scores. +awk ' {s=0; for(i=3; i<=NF; i++) s+=$i; print $1, s}' scores-table.txt # 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 index c85053e0..682b379b 100755 --- 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 index 01bbd5ea..8fa1ffef 100755 --- a/individual-shell-tools/cat/script-02.sh +++ b/individual-shell-tools/cat/script-02.sh @@ -3,6 +3,8 @@ 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/helper-*.txt + # Make sure you are only calling `cat` once. # # The output of this command should be: diff --git a/individual-shell-tools/cat/script-03.sh b/individual-shell-tools/cat/script-03.sh index 37573b0c..22338dbe 100755 --- a/individual-shell-tools/cat/script-03.sh +++ b/individual-shell-tools/cat/script-03.sh @@ -3,6 +3,8 @@ 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: diff --git a/individual-shell-tools/cat/script-04-stretch.sh b/individual-shell-tools/cat/script-04-stretch.sh index 00fe3c48..8d74f82b 100755 --- a/individual-shell-tools/cat/script-04-stretch.sh +++ b/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 ../helper-files/helper-1.txt ../helper-files/helper-2.txt ../helper-files/helper-3.txt |awk '{print NR,$0}' # 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: diff --git a/individual-shell-tools/grep/script-01.sh b/individual-shell-tools/grep/script-01.sh index fb05f42f..c4f3a4d4 100755 --- 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 index df6f8564..505da8ec 100755 --- 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 index 5383fe57..82e5f8a6 100755 --- 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 -ic "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 index 80ee0477..01076d38 100755 --- 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 -vi "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 index 1eb53818..c205ba90 100755 --- 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 -i -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 index 5670e3b6..25d1d56b 100755 --- 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 index 9670ebad..f187b3c0 100755 --- 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 -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/ls/script-01.sh b/individual-shell-tools/ls/script-01.sh index 241b62f5..044af361 100755 --- a/individual-shell-tools/ls/script-01.sh +++ b/individual-shell-tools/ls/script-01.sh @@ -12,4 +12,5 @@ if [[ "${script_dir}" != "$(pwd)" ]]; then fi # TODO: Write a command to list the files and folders in this directory. +ls # The output should be a list of names including child-directory, script-01.sh, script-02.sh, and more. diff --git a/individual-shell-tools/ls/script-02.sh b/individual-shell-tools/ls/script-02.sh index d0a5a10f..33e4b10b 100755 --- a/individual-shell-tools/ls/script-02.sh +++ b/individual-shell-tools/ls/script-02.sh @@ -3,4 +3,5 @@ set -euo pipefail # TODO: Write a command which lists all of the files in the directory named child-directory. +ls child-directory # The output should be a list of names: helper-1.txt, helper-2.txt, helper-3.txt. diff --git a/individual-shell-tools/ls/script-03.sh b/individual-shell-tools/ls/script-03.sh index 781216d2..0dc1c2f8 100755 --- a/individual-shell-tools/ls/script-03.sh +++ b/individual-shell-tools/ls/script-03.sh @@ -3,5 +3,6 @@ set -euo pipefail # TODO: Write a command which _recursively_ lists all of the files and folders in this directory _and_ all of the files inside those folders. +ls -R # The output should be a list of names including: child-directory, script-01.sh, helper-1.txt (and more). # The formatting of the output doesn't matter. diff --git a/individual-shell-tools/ls/script-04.sh b/individual-shell-tools/ls/script-04.sh index 72f3817b..f5849b25 100755 --- a/individual-shell-tools/ls/script-04.sh +++ b/individual-shell-tools/ls/script-04.sh @@ -14,10 +14,12 @@ touch "${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 -1t 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 -1tr 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. diff --git a/individual-shell-tools/sed/script-01.sh b/individual-shell-tools/sed/script-01.sh index 3eba6fa4..9edc8efe 100755 --- 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 index abdd64d0..e7ec3f48 100755 --- 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 index dd284a29..4be42f03 100755 --- 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 index 0052ac6c..fcac5ae0 100755 --- 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 index 2dcc91a0..7bdf0d5c 100755 --- 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 's/^\([0-9]\+\) \(.*\)/\2 \1/' 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 index 0b939017..3f4a6697 100755 --- 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 index c9dd6e5d..c56cf389 100755 --- 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 index 8feeb1a6..75365787 100755 --- 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 index 6b2e9d3d..a7cd9b35 100755 --- 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 -lwc ../helper-files/helper-1.txt ../helper-files/helper-2.txt ../helper-files/helper-3.txt # The output should be something like: # 1 4 20 ../helper-files/helper-1.txt # 1 7 39 ../helper-files/helper-2.txt