From 1e401948cc14e4004ebfb4453f405ff43dd9bd71 Mon Sep 17 00:00:00 2001
From: Rashaad Ebrahim <rmebrahim@gmail.com>
Date: Tue, 4 Nov 2025 20:12:24 +0200
Subject: [PATCH 1/8] ls exercises complete

---
 individual-shell-tools/ls/script-01.sh | 1 +
 individual-shell-tools/ls/script-02.sh | 2 ++
 individual-shell-tools/ls/script-03.sh | 1 +
 individual-shell-tools/ls/script-04.sh | 2 ++
 4 files changed, 6 insertions(+)

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..cec24305d 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 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..0dc1c2f8a 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 72f3817b3..7c82c5d86 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 -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.

From 6c213c55c9cc9f06115e34357016119cc7231e24 Mon Sep 17 00:00:00 2001
From: Rashaad Ebrahim <rmebrahim@gmail.com>
Date: Tue, 4 Nov 2025 22:30:07 +0200
Subject: [PATCH 2/8] cat exercises complete

---
 individual-shell-tools/cat/script-01.sh         | 1 +
 individual-shell-tools/cat/script-02.sh         | 1 +
 individual-shell-tools/cat/script-03.sh         | 1 +
 individual-shell-tools/cat/script-04-stretch.sh | 1 +
 4 files changed, 4 insertions(+)

diff --git a/individual-shell-tools/cat/script-01.sh b/individual-shell-tools/cat/script-01.sh
index c85053e0f..682b379b6 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 01bbd5eab..4806714bd 100755
--- a/individual-shell-tools/cat/script-02.sh
+++ b/individual-shell-tools/cat/script-02.sh
@@ -4,6 +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...
diff --git a/individual-shell-tools/cat/script-03.sh b/individual-shell-tools/cat/script-03.sh
index 37573b0c1..05957a5a4 100755
--- a/individual-shell-tools/cat/script-03.sh
+++ b/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:
diff --git a/individual-shell-tools/cat/script-04-stretch.sh b/individual-shell-tools/cat/script-04-stretch.sh
index 00fe3c48b..a9c3f8752 100755
--- a/individual-shell-tools/cat/script-04-stretch.sh
+++ b/individual-shell-tools/cat/script-04-stretch.sh
@@ -6,6 +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 -n ../helper-files/helper*
 #
 # The output of this command should be something like:
 # 1 Once upon a time...

From 79c371eeb10a6e7d2abf42f92e684865e6110a60 Mon Sep 17 00:00:00 2001
From: Rashaad Ebrahim <rmebrahim@gmail.com>
Date: Wed, 5 Nov 2025 12:35:14 +0200
Subject: [PATCH 3/8] wc exercises complete

---
 individual-shell-tools/wc/script-01.sh | 1 +
 individual-shell-tools/wc/script-02.sh | 2 ++
 individual-shell-tools/wc/script-03.sh | 1 +
 3 files changed, 4 insertions(+)

diff --git a/individual-shell-tools/wc/script-01.sh b/individual-shell-tools/wc/script-01.sh
index c9dd6e5df..db1528e91 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 8feeb1a62..9c312f945 100755
--- a/individual-shell-tools/wc/script-02.sh
+++ b/individual-shell-tools/wc/script-02.sh
@@ -3,4 +3,6 @@
 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 6b2e9d3d1..92bb0195e 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  ../helper-files/*
 # The output should be something like:
 #        1       4      20 ../helper-files/helper-1.txt
 #        1       7      39 ../helper-files/helper-2.txt

From 5f214aa768f4ae8a352451d373a708fab842425e Mon Sep 17 00:00:00 2001
From: Rashaad Ebrahim <rmebrahim@gmail.com>
Date: Wed, 5 Nov 2025 13:43:09 +0200
Subject: [PATCH 4/8] grep exercises complete

---
 individual-shell-tools/grep/script-01.sh | 2 ++
 individual-shell-tools/grep/script-02.sh | 2 ++
 individual-shell-tools/grep/script-03.sh | 1 +
 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 ++
 7 files changed, 13 insertions(+)

diff --git a/individual-shell-tools/grep/script-01.sh b/individual-shell-tools/grep/script-01.sh
index fb05f42f2..dc743ba0b 100755
--- a/individual-shell-tools/grep/script-01.sh
+++ b/individual-shell-tools/grep/script-01.sh
@@ -3,4 +3,6 @@
 set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt said by the Doctor.
+grep "^Doctor\b" 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 df6f85640..eac953cf4 100755
--- a/individual-shell-tools/grep/script-02.sh
+++ b/individual-shell-tools/grep/script-02.sh
@@ -3,4 +3,6 @@
 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 5383fe578..71f6d4d38 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 80ee04776..42365f384 100755
--- a/individual-shell-tools/grep/script-04.sh
+++ b/individual-shell-tools/grep/script-04.sh
@@ -3,4 +3,6 @@
 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 -icv 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 1eb538185..25ec33905 100755
--- a/individual-shell-tools/grep/script-05.sh
+++ b/individual-shell-tools/grep/script-05.sh
@@ -3,4 +3,6 @@
 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 -iC 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 5670e3b6c..f31d66e4e 100755
--- a/individual-shell-tools/grep/script-06.sh
+++ b/individual-shell-tools/grep/script-06.sh
@@ -3,4 +3,6 @@
 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\b" *.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 9670ebad9..aec7b27a2 100755
--- a/individual-shell-tools/grep/script-07.sh
+++ b/individual-shell-tools/grep/script-07.sh
@@ -3,4 +3,6 @@
 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\b" *.txt
+
 # The output should show that dialogue.txt contains 6 lines, dialogue-2.txt contains 2, and dialogue-3.txt contains 0.

From c35ce920fe0f9260adf17a1115330d489578a225 Mon Sep 17 00:00:00 2001
From: Rashaad Ebrahim <rmebrahim@gmail.com>
Date: Wed, 5 Nov 2025 15:49:27 +0200
Subject: [PATCH 5/8] sed exercises complete

---
 individual-shell-tools/sed/script-01.sh | 1 +
 individual-shell-tools/sed/script-02.sh | 2 ++
 individual-shell-tools/sed/script-03.sh | 2 ++
 individual-shell-tools/sed/script-04.sh | 1 +
 individual-shell-tools/sed/script-05.sh | 1 +
 individual-shell-tools/sed/script-06.sh | 2 ++
 6 files changed, 9 insertions(+)

diff --git a/individual-shell-tools/sed/script-01.sh b/individual-shell-tools/sed/script-01.sh
index 3eba6fa4d..6cb12d924 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 abdd64d06..96228308e 100755
--- a/individual-shell-tools/sed/script-02.sh
+++ b/individual-shell-tools/sed/script-02.sh
@@ -3,5 +3,7 @@
 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 dd284a296..4d8e3dd9e 100755
--- a/individual-shell-tools/sed/script-03.sh
+++ b/individual-shell-tools/sed/script-03.sh
@@ -3,4 +3,6 @@
 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 0052ac6c4..fcac5ae0d 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 2dcc91a0c..b710d689d 100755
--- a/individual-shell-tools/sed/script-05.sh
+++ b/individual-shell-tools/sed/script-05.sh
@@ -4,5 +4,6 @@ set -euo pipefail
 
 # TODO: Write a command to output input.txt with one change:
 # If a line starts with a number and a space, make the line instead end with a space and the number.
+sed 's/^\([0-9]\+\) \(.*\)/\2 \1/' input.txt
 # 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 0b9390170..2259183c2 100755
--- a/individual-shell-tools/sed/script-06.sh
+++ b/individual-shell-tools/sed/script-06.sh
@@ -3,6 +3,8 @@
 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.

From 323f520760c1664ef6353727674dbf6a6bb40f98 Mon Sep 17 00:00:00 2001
From: Rashaad Ebrahim <rmebrahim@gmail.com>
Date: Wed, 5 Nov 2025 21:27:34 +0200
Subject: [PATCH 6/8] awk exercises complete

---
 individual-shell-tools/awk/script-01.sh         | 2 ++
 individual-shell-tools/awk/script-02.sh         | 1 +
 individual-shell-tools/awk/script-03.sh         | 2 ++
 individual-shell-tools/awk/script-04.sh         | 1 +
 individual-shell-tools/awk/script-05.sh         | 1 +
 individual-shell-tools/awk/script-06-stretch.sh | 2 ++
 individual-shell-tools/awk/script-07-stretch.sh | 7 +++++++
 7 files changed, 16 insertions(+)

diff --git a/individual-shell-tools/awk/script-01.sh b/individual-shell-tools/awk/script-01.sh
index 8db4390af..f99827a13 100755
--- a/individual-shell-tools/awk/script-01.sh
+++ b/individual-shell-tools/awk/script-01.sh
@@ -3,4 +3,6 @@
 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 5956be9bd..494a8ee30 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 af7c6e8b9..8e2add017 100755
--- a/individual-shell-tools/awk/script-03.sh
+++ b/individual-shell-tools/awk/script-03.sh
@@ -3,5 +3,7 @@
 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 bf15703c7..ddfe81f80 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.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 d1680cb02..2abcf18ec 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 0201e6378..d3078c65e 100755
--- a/individual-shell-tools/awk/script-06-stretch.sh
+++ b/individual-shell-tools/awk/script-06-stretch.sh
@@ -5,4 +5,6 @@ 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 '{if (NF > 2) sum += $3} END {print sum}' scores.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 3f7155880..3f4154502 100755
--- a/individual-shell-tools/awk/script-07-stretch.sh
+++ b/individual-shell-tools/awk/script-07-stretch.sh
@@ -5,5 +5,12 @@ 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 '{ 
+  total = 0; 
+  for (i = 3; i <= NF; i++) total += $i; 
+  print $1, total 
+}' 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"

From f02026efffed9a5415fd60dabf822067a05a5f64 Mon Sep 17 00:00:00 2001
From: Rashaad Ebrahim <rmebrahim@gmail.com>
Date: Wed, 5 Nov 2025 21:29:28 +0200
Subject: [PATCH 7/8] awk exercises corrections

---
 individual-shell-tools/awk/script-04.sh         | 2 +-
 individual-shell-tools/awk/script-06-stretch.sh | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/individual-shell-tools/awk/script-04.sh b/individual-shell-tools/awk/script-04.sh
index ddfe81f80..fa77c70c1 100755
--- a/individual-shell-tools/awk/script-04.sh
+++ b/individual-shell-tools/awk/script-04.sh
@@ -3,6 +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.txt
+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-06-stretch.sh b/individual-shell-tools/awk/script-06-stretch.sh
index d3078c65e..232dd25af 100755
--- a/individual-shell-tools/awk/script-06-stretch.sh
+++ b/individual-shell-tools/awk/script-06-stretch.sh
@@ -5,6 +5,6 @@ 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 '{if (NF > 2) sum += $3} END {print sum}' scores.txt
+awk '{if (NF > 2) sum += $3} END {print sum}' scores-table.txt
 
 # Your output should be exactly the number 54.

From 81e207251ddcfc0de5d5b93903b74863fb01d104 Mon Sep 17 00:00:00 2001
From: Rashaad Ebrahim <rmebrahim@gmail.com>
Date: Wed, 19 Nov 2025 13:46:39 +0200
Subject: [PATCH 8/8] Updated grep script-05.sh

---
 individual-shell-tools/grep/script-05.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/individual-shell-tools/grep/script-05.sh b/individual-shell-tools/grep/script-05.sh
index 25ec33905..1d620d664 100755
--- a/individual-shell-tools/grep/script-05.sh
+++ b/individual-shell-tools/grep/script-05.sh
@@ -3,6 +3,6 @@
 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 -iC 1 cure dialogue.txt
+grep -iB 1 cure dialogue.txt
 
 # The output should contain two pairs of two lines of text (with a separator between them).