From 574c69b87ade5e691b42a27f59a100d81d4a31af Mon Sep 17 00:00:00 2001
From: Ebrahim Beiaty <ebrahimbeiaty@gmail.com>
Date: Wed, 11 Mar 2026 15:51:45 +0000
Subject: [PATCH 1/3] shell pipelines task

---
 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 | 2 ++
 shell-pipelines/sort-uniq-head-tail/script-05.sh | 1 +
 shell-pipelines/sort-uniq-head-tail/script-06.sh | 1 +
 shell-pipelines/sort-uniq-head-tail/script-07.sh | 1 +
 shell-pipelines/tr/script-01.sh                  | 1 +
 shell-pipelines/tr/script-02.sh                  | 1 +
 13 files changed, 14 insertions(+)

diff --git a/shell-pipelines/ls-grep/script-01.sh b/shell-pipelines/ls-grep/script-01.sh
index 8c7d968a2..b77993b26 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]'
diff --git a/shell-pipelines/ls-grep/script-02.sh b/shell-pipelines/ls-grep/script-02.sh
index 16f5f71d9..4fa4206cd 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 a302ab036..9b79f1c8c 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 c000b7e3b..b9b1fef9e 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
diff --git a/shell-pipelines/sort-uniq-head-tail/script-01.sh b/shell-pipelines/sort-uniq-head-tail/script-01.sh
index 171e1f989..845ad89da 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
diff --git a/shell-pipelines/sort-uniq-head-tail/script-02.sh b/shell-pipelines/sort-uniq-head-tail/script-02.sh
index 29c3c2524..e0281500d 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 -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
index bcbaf3420..8e3f8b350 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 -k3,3nr scores-table.txt | 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 65a5cfba8..fdf8178ee 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-04.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-04.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 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 -2 | tail -1
+
diff --git a/shell-pipelines/sort-uniq-head-tail/script-05.sh b/shell-pipelines/sort-uniq-head-tail/script-05.sh
index a93cd9f9d..8eba57e36 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 715c7ae5c..62a643697 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-06.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-06.sh
@@ -5,3 +5,4 @@ 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.
+cut -d' ' -f1 events.txt | sort | uniq -c
\ 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 7fd07e1ff..8c637ef20 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-07.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-07.sh
@@ -6,3 +6,4 @@ 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.
+awk 'NR>1 {counts[$3]++} END {for (event in counts) print counts[event], event}' events-with-timestamps.txt
diff --git a/shell-pipelines/tr/script-01.sh b/shell-pipelines/tr/script-01.sh
index 8bb0211e9..3553c5aa5 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 (.).
+tr '!' '.' < text.txt
\ No newline at end of file
diff --git a/shell-pipelines/tr/script-02.sh b/shell-pipelines/tr/script-02.sh
index cf3a503a2..a5250f788 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).
+tr 'YyZz' 'ZzYy' < text.txt
\ No newline at end of file

From 856f2fc35850ee6e6450d2aae545e321181af1d4 Mon Sep 17 00:00:00 2001
From: Ebrahim Beiaty <ebrahimbeiaty@gmail.com>
Date: Sun, 26 Apr 2026 16:29:52 +0100
Subject: [PATCH 2/3] added new lines.

---
 .DS_Store                                     | Bin 0 -> 8196 bytes
 package.json                                  |  15 +++
 .../sort-uniq-head-tail/script-03.sh          |   2 +-
 .../sort-uniq-head-tail/script-06.sh          |   2 +-
 shell-pipelines/tr/script-01.sh               |   2 +-
 shell-pipelines/tr/script-02.sh               |   2 +-
 sprint-5/.DS_Store                            | Bin 0 -> 6148 bytes
 tests/runIntegrationTests.js                  |  96 ++++++++++++++++++
 8 files changed, 115 insertions(+), 4 deletions(-)
 create mode 100644 .DS_Store
 create mode 100644 package.json
 create mode 100644 sprint-5/.DS_Store
 create mode 100644 tests/runIntegrationTests.js

diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000000000000000000000000000000000000..3789c891bd2c9e9a8bbadd1901d9eb1b4d4ce9ba
GIT binary patch
literal 8196
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literal 0
HcmV?d00001

diff --git a/package.json b/package.json
new file mode 100644
index 000000000..85bb6cb6c
--- /dev/null
+++ b/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "module-tools",
+  "version": "1.0.0",
+  "description": "Exercises to practice and solidify your understanding of the Tools module of the Software Development Course.",
+  "main": "index.js",
+  "directories": {
+    "test": "tests"
+  },
+  "scripts": {
+    "test": "node tests/runIntegrationTests.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC"
+}
diff --git a/shell-pipelines/sort-uniq-head-tail/script-03.sh b/shell-pipelines/sort-uniq-head-tail/script-03.sh
index 8e3f8b350..46959e367 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 -k3,3nr scores-table.txt | head -3
\ No newline at end of file
+sort -k3,3nr scores-table.txt | head -3
diff --git a/shell-pipelines/sort-uniq-head-tail/script-06.sh b/shell-pipelines/sort-uniq-head-tail/script-06.sh
index 62a643697..ef4144b65 100755
--- a/shell-pipelines/sort-uniq-head-tail/script-06.sh
+++ b/shell-pipelines/sort-uniq-head-tail/script-06.sh
@@ -5,4 +5,4 @@ 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.
-cut -d' ' -f1 events.txt | sort | uniq -c
\ No newline at end of file
+cut -d' ' -f1 events.txt | sort | uniq -c
diff --git a/shell-pipelines/tr/script-01.sh b/shell-pipelines/tr/script-01.sh
index 3553c5aa5..f91ef30d3 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 (.).
-tr '!' '.' < text.txt
\ No newline at end of file
+tr '!' '.' < text.txt
diff --git a/shell-pipelines/tr/script-02.sh b/shell-pipelines/tr/script-02.sh
index a5250f788..96a208b9a 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).
-tr 'YyZz' 'ZzYy' < text.txt
\ No newline at end of file
+tr 'YyZz' 'ZzYy' < text.txt
diff --git a/sprint-5/.DS_Store b/sprint-5/.DS_Store
new file mode 100644
index 0000000000000000000000000000000000000000..5008ddfcf53c02e82d7eee2e57c38e5672ef89f6
GIT binary patch
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diff --git a/tests/runIntegrationTests.js b/tests/runIntegrationTests.js
new file mode 100644
index 000000000..034114e37
--- /dev/null
+++ b/tests/runIntegrationTests.js
@@ -0,0 +1,96 @@
+const { execSync } = require("node:child_process");
+
+function runCommand(command) {
+  return execSync(command, { encoding: "utf-8" }).trim();
+}
+
+function normalizeOutput(output) {
+  return output.replaceAll(/\s+/g, " ").trim();
+}
+
+function test(name, systemCommand, nodeCommand) {
+  try {
+    const expected = normalizeOutput(runCommand(systemCommand));
+    const actual = normalizeOutput(runCommand(nodeCommand));
+    if (expected === actual) {
+      console.log(`✅ ${name} passed`);
+    } else {
+      console.error(`❌ ${name} failed`);
+      console.error(`Expected: "${expected}"`);
+      console.error(`Actual:   "${actual}"`);
+    }
+  } catch (error) {
+    console.error(`❌ ${name} failed with error: ${error.message}`);
+  }
+}
+
+/* CAT TESTS */
+test(
+  "cat single file",
+  "cat implement-shell-tools/cat/sample-files/1.txt",
+  "node implement-shell-tools/cat/cat.js implement-shell-tools/cat/sample-files/1.txt",
+);
+
+test(
+  "cat -n single file",
+  "cat -n implement-shell-tools/cat/sample-files/1.txt",
+  "node implement-shell-tools/cat/cat.js -n implement-shell-tools/cat/sample-files/1.txt",
+);
+
+test(
+  "cat multiple files",
+  "cat implement-shell-tools/cat/sample-files/*.txt",
+  "node implement-shell-tools/cat/cat.js implement-shell-tools/cat/sample-files/*.txt",
+);
+
+test(
+  "cat -n multiple files",
+  "cat -n implement-shell-tools/cat/sample-files/*.txt",
+  "node implement-shell-tools/cat/cat.js -n implement-shell-tools/cat/sample-files/*.txt",
+);
+
+test(
+  "cat -b file",
+  "cat -b implement-shell-tools/cat/sample-files/3.txt",
+  "node implement-shell-tools/cat/cat.js -b implement-shell-tools/cat/sample-files/3.txt",
+);
+
+/* LS TESTS */
+
+test(
+  "ls sample-files",
+  "ls implement-shell-tools/ls/sample-files",
+  "node implement-shell-tools/ls/ls.js implement-shell-tools/ls/sample-files",
+);
+
+/* WC TESTS */
+
+test(
+  "wc all files",
+  "wc implement-shell-tools/wc/sample-files/*",
+  "node implement-shell-tools/wc/wc.js implement-shell-tools/wc/sample-files/*",
+);
+
+test(
+  "wc -l single file",
+  "wc -l implement-shell-tools/wc/sample-files/3.txt",
+  "node implement-shell-tools/wc/wc.js -l implement-shell-tools/wc/sample-files/3.txt",
+);
+
+test(
+  "wc -w single file",
+  "wc -w implement-shell-tools/wc/sample-files/3.txt",
+  "node implement-shell-tools/wc/wc.js -w implement-shell-tools/wc/sample-files/3.txt",
+);
+
+test(
+  "wc -c single file",
+  "wc -c implement-shell-tools/wc/sample-files/3.txt",
+  "node implement-shell-tools/wc/wc.js -c implement-shell-tools/wc/sample-files/3.txt",
+);
+
+test(
+  "wc -l multiple files",
+  "wc -l implement-shell-tools/wc/sample-files/*",
+  "node implement-shell-tools/wc/wc.js -l implement-shell-tools/wc/sample-files/*",
+);

From 701ebc2094c917f3f89d33cd2f9147ac62c02bb9 Mon Sep 17 00:00:00 2001
From: Ebrahim Beiaty <ebrahimbeiaty@gmail.com>
Date: Sun, 26 Apr 2026 16:45:16 +0100
Subject: [PATCH 3/3] Remove non-shell-pipelines files from PR scope

---
 .DS_Store                    | Bin 8196 -> 0 bytes
 package.json                 |  15 ------
 sprint-5/.DS_Store           | Bin 6148 -> 0 bytes
 tests/runIntegrationTests.js |  96 -----------------------------------
 4 files changed, 111 deletions(-)
 delete mode 100644 .DS_Store
 delete mode 100644 package.json
 delete mode 100644 sprint-5/.DS_Store
 delete mode 100644 tests/runIntegrationTests.js

diff --git a/.DS_Store b/.DS_Store
deleted file mode 100644
index 3789c891bd2c9e9a8bbadd1901d9eb1b4d4ce9ba..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/package.json b/package.json
deleted file mode 100644
index 85bb6cb6c..000000000
--- a/package.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  "name": "module-tools",
-  "version": "1.0.0",
-  "description": "Exercises to practice and solidify your understanding of the Tools module of the Software Development Course.",
-  "main": "index.js",
-  "directories": {
-    "test": "tests"
-  },
-  "scripts": {
-    "test": "node tests/runIntegrationTests.js"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC"
-}
diff --git a/sprint-5/.DS_Store b/sprint-5/.DS_Store
deleted file mode 100644
index 5008ddfcf53c02e82d7eee2e57c38e5672ef89f6..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/tests/runIntegrationTests.js b/tests/runIntegrationTests.js
deleted file mode 100644
index 034114e37..000000000
--- a/tests/runIntegrationTests.js
+++ /dev/null
@@ -1,96 +0,0 @@
-const { execSync } = require("node:child_process");
-
-function runCommand(command) {
-  return execSync(command, { encoding: "utf-8" }).trim();
-}
-
-function normalizeOutput(output) {
-  return output.replaceAll(/\s+/g, " ").trim();
-}
-
-function test(name, systemCommand, nodeCommand) {
-  try {
-    const expected = normalizeOutput(runCommand(systemCommand));
-    const actual = normalizeOutput(runCommand(nodeCommand));
-    if (expected === actual) {
-      console.log(`✅ ${name} passed`);
-    } else {
-      console.error(`❌ ${name} failed`);
-      console.error(`Expected: "${expected}"`);
-      console.error(`Actual:   "${actual}"`);
-    }
-  } catch (error) {
-    console.error(`❌ ${name} failed with error: ${error.message}`);
-  }
-}
-
-/* CAT TESTS */
-test(
-  "cat single file",
-  "cat implement-shell-tools/cat/sample-files/1.txt",
-  "node implement-shell-tools/cat/cat.js implement-shell-tools/cat/sample-files/1.txt",
-);
-
-test(
-  "cat -n single file",
-  "cat -n implement-shell-tools/cat/sample-files/1.txt",
-  "node implement-shell-tools/cat/cat.js -n implement-shell-tools/cat/sample-files/1.txt",
-);
-
-test(
-  "cat multiple files",
-  "cat implement-shell-tools/cat/sample-files/*.txt",
-  "node implement-shell-tools/cat/cat.js implement-shell-tools/cat/sample-files/*.txt",
-);
-
-test(
-  "cat -n multiple files",
-  "cat -n implement-shell-tools/cat/sample-files/*.txt",
-  "node implement-shell-tools/cat/cat.js -n implement-shell-tools/cat/sample-files/*.txt",
-);
-
-test(
-  "cat -b file",
-  "cat -b implement-shell-tools/cat/sample-files/3.txt",
-  "node implement-shell-tools/cat/cat.js -b implement-shell-tools/cat/sample-files/3.txt",
-);
-
-/* LS TESTS */
-
-test(
-  "ls sample-files",
-  "ls implement-shell-tools/ls/sample-files",
-  "node implement-shell-tools/ls/ls.js implement-shell-tools/ls/sample-files",
-);
-
-/* WC TESTS */
-
-test(
-  "wc all files",
-  "wc implement-shell-tools/wc/sample-files/*",
-  "node implement-shell-tools/wc/wc.js implement-shell-tools/wc/sample-files/*",
-);
-
-test(
-  "wc -l single file",
-  "wc -l implement-shell-tools/wc/sample-files/3.txt",
-  "node implement-shell-tools/wc/wc.js -l implement-shell-tools/wc/sample-files/3.txt",
-);
-
-test(
-  "wc -w single file",
-  "wc -w implement-shell-tools/wc/sample-files/3.txt",
-  "node implement-shell-tools/wc/wc.js -w implement-shell-tools/wc/sample-files/3.txt",
-);
-
-test(
-  "wc -c single file",
-  "wc -c implement-shell-tools/wc/sample-files/3.txt",
-  "node implement-shell-tools/wc/wc.js -c implement-shell-tools/wc/sample-files/3.txt",
-);
-
-test(
-  "wc -l multiple files",
-  "wc -l implement-shell-tools/wc/sample-files/*",
-  "node implement-shell-tools/wc/wc.js -l implement-shell-tools/wc/sample-files/*",
-);