CodeYourFuture · Luke-Manyamazi · Jul 22, 2025 · Jul 22, 2025 · Jul 22, 2025 · Jul 22, 2025
diff --git a/shell-pipelines/ls-grep/script-01.sh b/shell-pipelines/ls-grep/script-01.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the names of the files in the sample-files directory whose name contains at least one upper case letter.
 # Your output should contain 11 files.
+ls sample-files | grep -E '[A-Z]'
diff --git a/shell-pipelines/ls-grep/script-02.sh b/shell-pipelines/ls-grep/script-02.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the names of the files in the sample-files directory whose name starts with an upper case letter.
 # Your output should contain 10 files.
+ls sample-files | grep -E '^[A-Z]'
diff --git a/shell-pipelines/ls-grep/script-03.sh b/shell-pipelines/ls-grep/script-03.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the names of the files in the sample-files directory whose name starts with an upper case letter and doesn't contain any other upper case letters.
 # Your output should contain 7 files.
+ls sample-files | grep -E '^[A-Z]$|^[A-Z][a-z]*$'
diff --git a/shell-pipelines/ls-grep/script-04.sh b/shell-pipelines/ls-grep/script-04.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to count the number of files in the sample-files directory whose name starts with an upper case letter and doesn't contain any other upper case letters.
 # Your output should be the number 7.
+ls sample-files | grep -E '^[A-Z]$|^[A-Z][a-z]*$' | wc -l
diff --git a/shell-pipelines/sort-uniq-head-tail/script-01.sh b/shell-pipelines/sort-uniq-head-tail/script-01.sh
@@ -5,3 +5,5 @@ set -euo pipefail
 # The input for this script is the scores-table.txt file.
 # TODO: Write a command to output scores-table.txt, with lines sorted by the person's name.
 # The first line of your output should be "Ahmed London 1 10 4" (with no quotes). And the third line should be "Chandra Birmingham 12 6".
+sort -k1 scores-table.txt
+
diff --git a/shell-pipelines/sort-uniq-head-tail/script-02.sh b/shell-pipelines/sort-uniq-head-tail/script-02.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # The input for this script is the scores-table.txt file.
 # TODO: Write a command to output scores-table.txt, with lines sorted by the person's first score, descending.
 # The first line of your output should be "Basia London 22 9 6" (with no quotes).
+sort -k3,3nr scores-table.txt
diff --git a/shell-pipelines/sort-uniq-head-tail/script-03.sh b/shell-pipelines/sort-uniq-head-tail/script-03.sh
@@ -8,3 +8,4 @@ set -euo pipefail
 # Basia London 22 9 6
 # Piotr Glasgow 15 2 25 11 8
 # Chandra Birmingham 12 6
+sort -k3,3nr scores-table.txt | head -n 3
diff --git a/shell-pipelines/sort-uniq-head-tail/script-04.sh b/shell-pipelines/sort-uniq-head-tail/script-04.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # The input for this script is the scores-table.txt file.
 # TODO: Write a command to output scores-table.txt, with shows the line for the player whose first score was the second highest.
 # Your output should be: "Piotr Glasgow 15 2 25 11 8" (without quotes).
+sort -k3,3nr scores-table.txt | head -n 2 | tail -n 1
diff --git a/shell-pipelines/sort-uniq-head-tail/script-05.sh b/shell-pipelines/sort-uniq-head-tail/script-05.sh
@@ -6,3 +6,4 @@ set -euo pipefail
 # TODO: Write a command to show a list of all events that have happened, without duplication.
 # The order they're displayed doesn't matter, but we never want to see the same event listed twice.
 # Your output should contain 6 lines.
+sort events.txt | uniq
diff --git a/shell-pipelines/sort-uniq-head-tail/script-06.sh b/shell-pipelines/sort-uniq-head-tail/script-06.sh
@@ -5,3 +5,6 @@ set -euo pipefail
 # The input for this script is the events.txt file.
 # TODO: Write a command to show how many times anyone has entered and exited.
 # It should be clear from your script's output that there have been 5 Entry events and 4 Exit events.
+echo "$(grep -c "Entry" events.txt) Entry events"
+echo "$(grep -c "Exit" events.txt) Exit events" 
+
diff --git a/shell-pipelines/sort-uniq-head-tail/script-07.sh b/shell-pipelines/sort-uniq-head-tail/script-07.sh
@@ -6,3 +6,5 @@ set -euo pipefail
 # TODO: Write a command to show how many times anyone has entered and exited.
 # It should be clear from your script's output that there have been 5 Entry events and 4 Exit events.
 # The word "Event" should not appear in your script's output.
+grep -c "Entry" events-with-timestamps.txt
+grep -c "Exit" events-with-timestamps.txt
diff --git a/shell-pipelines/tr/script-01.sh b/shell-pipelines/tr/script-01.sh
@@ -6,3 +6,5 @@ set -euo pipefail
 # The author got feedback that they're using too many exclamation marks (!).
 #
 # TODO: Write a command to output the contents of text.txt with every exclamation mark (!) replaced with a full-stop (.).
+tr '!' '.' < text.txt
+
diff --git a/shell-pipelines/tr/script-02.sh b/shell-pipelines/tr/script-02.sh
@@ -7,3 +7,4 @@ set -euo pipefail
 # so every Y should be a Z, and every Z should be a Y!
 #
 # TODO: Write a command to output the contents of text.txt with every Y and Z swapped (both upper and lower case).
+tr 'YyZz' 'ZzYy' < text.txt
Original file line number	Diff line number	Diff line change
Expand Up		@@ -4,3 +4,4 @@ set -euo pipefail

		# TODO: Write a command to output the names of the files in the sample-files directory whose name contains at least one upper case letter.
		# Your output should contain 11 files.
		ls sample-files \| grep -E '[A-Z]'
Original file line number	Diff line number	Diff line change
Expand Up		@@ -4,3 +4,4 @@ set -euo pipefail

		# TODO: Write a command to count the number of files in the sample-files directory whose name starts with an upper case letter and doesn't contain any other upper case letters.
		# Your output should be the number 7.
		ls sample-files \| grep -E '^[A-Z]$\|^[A-Z][a-z]*$' \| wc -l
Copy link LonMcGregor Aug 6, 2025 Choose a reason for hiding this comment The reason will be displayed to describe this comment to others. Learn more. Do you know of any arguments for grep that would let you count without needing to pipe into `wc`? Copy link Author Luke-Manyamazi Aug 6, 2025 Choose a reason for hiding this comment The reason will be displayed to describe this comment to others. Learn more. From the research I did, it seems that non-standard versions of grep, like GNU grep, support the -c option, which counts the number of matching lines. I could use a regex together with grep -c as an argument, as below: ls sample-files \| grep -c -E '^[A-Z]$\|^[A-Z][a-z]$' Copy link Author Luke-Manyamazi* Aug 6, 2025 Choose a reason for hiding this comment The reason will be displayed to describe this comment to others. Learn more. Thank you, @LonMcGregor, for reviewing my exercises. I really appreciate your feedback and guidance.