From 4a185bb15feec9c58f19442af3c76ed6763c0501 Mon Sep 17 00:00:00 2001
From: katarzynakaz <l453r3@gmail.com>
Date: Sat, 7 Feb 2026 14:06:42 +0000
Subject: [PATCH 1/2] shell pipelines only

---
 shell-pipelines/ls-grep/script-01.sh             | 1 +
 shell-pipelines/ls-grep/script-02.sh             | 1 +
 shell-pipelines/ls-grep/script-03.sh             | 1 +
 shell-pipelines/ls-grep/script-04.sh             | 1 +
 shell-pipelines/sort-uniq-head-tail/script-01.sh | 1 +
 shell-pipelines/sort-uniq-head-tail/script-02.sh | 1 +
 shell-pipelines/sort-uniq-head-tail/script-03.sh | 1 +
 shell-pipelines/sort-uniq-head-tail/script-04.sh | 1 +
 shell-pipelines/sort-uniq-head-tail/script-05.sh | 1 +
 shell-pipelines/sort-uniq-head-tail/script-06.sh | 2 ++
 shell-pipelines/sort-uniq-head-tail/script-07.sh | 4 ++++
 shell-pipelines/tr/script-01.sh                  | 1 +
 shell-pipelines/tr/script-02.sh                  | 1 +
 13 files changed, 17 insertions(+)

diff --git a/shell-pipelines/ls-grep/script-01.sh b/shell-pipelines/ls-grep/script-01.sh
index 8c7d968a..99d89d23 100755
--- 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 '[A-Z]'
\ No newline at end of file
diff --git a/shell-pipelines/ls-grep/script-02.sh b/shell-pipelines/ls-grep/script-02.sh
index 16f5f71d..f3cac5cf 100755
--- 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 '^[A-Z]'
diff --git a/shell-pipelines/ls-grep/script-03.sh b/shell-pipelines/ls-grep/script-03.sh
index a302ab03..bc2af6b9 100755
--- 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 '^[A-Z][^A-Z]*$'
diff --git a/shell-pipelines/ls-grep/script-04.sh b/shell-pipelines/ls-grep/script-04.sh
index c000b7e3..9fde7c6b 100755
--- 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 '^[A-Z][^A-Z]*$' | wc -l 
\ No newline at end of file
diff --git a/shell-pipelines/sort-uniq-head-tail/script-01.sh b/shell-pipelines/sort-uniq-head-tail/script-01.sh
index 171e1f98..1db218db 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-01.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-01.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 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 scores-table.txt
\ No newline at end of file
diff --git a/shell-pipelines/sort-uniq-head-tail/script-02.sh b/shell-pipelines/sort-uniq-head-tail/script-02.sh
index 29c3c252..5ecb3781 100755
--- 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 scores-table.txt -k3 -n -r
\ No newline at end of file
diff --git a/shell-pipelines/sort-uniq-head-tail/script-03.sh b/shell-pipelines/sort-uniq-head-tail/script-03.sh
index bcbaf342..7a6c3ebd 100755
--- 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 scores-table.txt -k3 -n -r | head -3
\ No newline at end of file
diff --git a/shell-pipelines/sort-uniq-head-tail/script-04.sh b/shell-pipelines/sort-uniq-head-tail/script-04.sh
index 65a5cfba..2a357c24 100755
--- 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 scores-table.txt -k3 -n -r | head -3 | tail -2 | head -1
\ No newline at end of file
diff --git a/shell-pipelines/sort-uniq-head-tail/script-05.sh b/shell-pipelines/sort-uniq-head-tail/script-05.sh
index a93cd9f9..840cf2aa 100755
--- 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
index 715c7ae5..33625a9f 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-06.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-06.sh
@@ -5,3 +5,5 @@ 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.
+grep -c 'Entry' events.txt | sort
+grep -c 'Exit' events.txt | sort
\ No newline at end of file
diff --git a/shell-pipelines/sort-uniq-head-tail/script-07.sh b/shell-pipelines/sort-uniq-head-tail/script-07.sh
index 7fd07e1f..dbd01e06 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-07.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-07.sh
@@ -6,3 +6,7 @@ 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.
+# echo "Entry: ${grep -c 'Entry' events-with-timestamps.txt}"
+# echo "Exit: ${grep -c 'Exit' events-with-timestamps.txt}"
+echo "Entry: $(grep -c 'Entry' events-with-timestamps.txt)"
+echo "Exit:  $(grep -c 'Exit'  events-with-timestamps.txt)"
\ No newline at end of file
diff --git a/shell-pipelines/tr/script-01.sh b/shell-pipelines/tr/script-01.sh
index 8bb0211e..ad6c7cd8 100755
--- a/shell-pipelines/tr/script-01.sh
+++ b/shell-pipelines/tr/script-01.sh
@@ -6,3 +6,4 @@ 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 (.).
+cat * text.txt | tr '!' '.'
\ No newline at end of file
diff --git a/shell-pipelines/tr/script-02.sh b/shell-pipelines/tr/script-02.sh
index cf3a503a..163b1140 100755
--- 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).
+cat * text.txt | tr 'Y' 'Z' | tr 'Z' 'Y' | tr 'y' 'z' | tr 'z' 'y'
\ No newline at end of file

From ee52f636aad0da1408937614cf4f817706b3495e Mon Sep 17 00:00:00 2001
From: katarzynakaz <l453r3@gmail.com>
Date: Sun, 22 Feb 2026 11:08:15 +0000
Subject: [PATCH 2/2] fixes made and training endings added

---
 shell-pipelines/ls-grep/script-01.sh             | 2 +-
 shell-pipelines/ls-grep/script-02.sh             | 1 +
 shell-pipelines/ls-grep/script-03.sh             | 1 +
 shell-pipelines/ls-grep/script-04.sh             | 2 +-
 shell-pipelines/sort-uniq-head-tail/script-01.sh | 2 +-
 shell-pipelines/sort-uniq-head-tail/script-02.sh | 2 +-
 shell-pipelines/sort-uniq-head-tail/script-03.sh | 2 +-
 shell-pipelines/sort-uniq-head-tail/script-04.sh | 2 +-
 shell-pipelines/sort-uniq-head-tail/script-06.sh | 4 ++--
 shell-pipelines/sort-uniq-head-tail/script-07.sh | 6 ++----
 shell-pipelines/tr/script-01.sh                  | 2 +-
 shell-pipelines/tr/script-02.sh                  | 2 +-
 12 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/shell-pipelines/ls-grep/script-01.sh b/shell-pipelines/ls-grep/script-01.sh
index 99d89d23..d781c3cb 100755
--- a/shell-pipelines/ls-grep/script-01.sh
+++ b/shell-pipelines/ls-grep/script-01.sh
@@ -4,4 +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 '[A-Z]'
\ No newline at end of file
+ls sample-files/ | grep '[A-Z]'
diff --git a/shell-pipelines/ls-grep/script-02.sh b/shell-pipelines/ls-grep/script-02.sh
index f3cac5cf..b3c7b71d 100755
--- a/shell-pipelines/ls-grep/script-02.sh
+++ b/shell-pipelines/ls-grep/script-02.sh
@@ -5,3 +5,4 @@ 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 '^[A-Z]'
+
diff --git a/shell-pipelines/ls-grep/script-03.sh b/shell-pipelines/ls-grep/script-03.sh
index bc2af6b9..832ea482 100755
--- a/shell-pipelines/ls-grep/script-03.sh
+++ b/shell-pipelines/ls-grep/script-03.sh
@@ -5,3 +5,4 @@ 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 '^[A-Z][^A-Z]*$'
+
diff --git a/shell-pipelines/ls-grep/script-04.sh b/shell-pipelines/ls-grep/script-04.sh
index 9fde7c6b..f6f6fe38 100755
--- a/shell-pipelines/ls-grep/script-04.sh
+++ b/shell-pipelines/ls-grep/script-04.sh
@@ -4,4 +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 '^[A-Z][^A-Z]*$' | wc -l 
\ No newline at end of file
+ls sample-files | grep '^[A-Z][^A-Z]*$' | wc -l 
diff --git a/shell-pipelines/sort-uniq-head-tail/script-01.sh b/shell-pipelines/sort-uniq-head-tail/script-01.sh
index 1db218db..845ad89d 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-01.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-01.sh
@@ -5,4 +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 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 scores-table.txt
\ No newline at end of file
+sort 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
index 5ecb3781..99c2d6f4 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-02.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-02.sh
@@ -5,4 +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 scores-table.txt -k3 -n -r
\ No newline at end of file
+sort scores-table.txt -k3 -n -r
diff --git a/shell-pipelines/sort-uniq-head-tail/script-03.sh b/shell-pipelines/sort-uniq-head-tail/script-03.sh
index 7a6c3ebd..12396182 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-03.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-03.sh
@@ -8,4 +8,4 @@ set -euo pipefail
 # Basia London 22 9 6
 # Piotr Glasgow 15 2 25 11 8
 # Chandra Birmingham 12 6
-sort scores-table.txt -k3 -n -r | head -3
\ No newline at end of file
+sort scores-table.txt -k3 -n -r | head -3
diff --git a/shell-pipelines/sort-uniq-head-tail/script-04.sh b/shell-pipelines/sort-uniq-head-tail/script-04.sh
index 2a357c24..043ead78 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-04.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-04.sh
@@ -5,4 +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 scores-table.txt -k3 -n -r | head -3 | tail -2 | head -1
\ No newline at end of file
+sort scores-table.txt -k3 -n -r | head -2 | tail -1
diff --git a/shell-pipelines/sort-uniq-head-tail/script-06.sh b/shell-pipelines/sort-uniq-head-tail/script-06.sh
index 33625a9f..199ec776 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-06.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-06.sh
@@ -5,5 +5,5 @@ 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.
-grep -c 'Entry' events.txt | sort
-grep -c 'Exit' events.txt | sort
\ No newline at end of file
+grep -o 'Entry' events.txt | uniq -c
+grep -o 'Exit' events.txt | uniq -c
diff --git a/shell-pipelines/sort-uniq-head-tail/script-07.sh b/shell-pipelines/sort-uniq-head-tail/script-07.sh
index dbd01e06..ce47d022 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-07.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-07.sh
@@ -6,7 +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.
-# echo "Entry: ${grep -c 'Entry' events-with-timestamps.txt}"
-# echo "Exit: ${grep -c 'Exit' events-with-timestamps.txt}"
-echo "Entry: $(grep -c 'Entry' events-with-timestamps.txt)"
-echo "Exit:  $(grep -c 'Exit'  events-with-timestamps.txt)"
\ No newline at end of file
+grep -o 'Entry' events-with-timestamps.txt | uniq -c
+grep -o 'Exit' events-with-timestamps.txt | uniq -c
diff --git a/shell-pipelines/tr/script-01.sh b/shell-pipelines/tr/script-01.sh
index ad6c7cd8..75c3ed25 100755
--- a/shell-pipelines/tr/script-01.sh
+++ b/shell-pipelines/tr/script-01.sh
@@ -6,4 +6,4 @@ 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 (.).
-cat * text.txt | tr '!' '.'
\ No newline at end of file
+cat text.txt | tr '!' '.'
diff --git a/shell-pipelines/tr/script-02.sh b/shell-pipelines/tr/script-02.sh
index 163b1140..5aebaf29 100755
--- a/shell-pipelines/tr/script-02.sh
+++ b/shell-pipelines/tr/script-02.sh
@@ -7,4 +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).
-cat * text.txt | tr 'Y' 'Z' | tr 'Z' 'Y' | tr 'y' 'z' | tr 'z' 'y'
\ No newline at end of file
+cat text.txt | tr 'YZyz' 'ZYzy'