From 4b02c825b75e2ffb86335bc9089719c31e331b2c Mon Sep 17 00:00:00 2001
From: miguel <miguel-silva98@hotmail.com>
Date: Wed, 30 Nov 2022 17:38:56 +0000
Subject: [PATCH] feat(skip-lines): add subject, test and solution for the
 exercise skip-line

---
 sh/tests/skip-lines_test.sh      | 11 ++++++++
 sh/tests/solutions/skip-lines.sh |  3 ++
 subjects/skip-lines/README.md    | 47 ++++++++++++++++++++++++++++++++
 3 files changed, 61 insertions(+)
 create mode 100755 sh/tests/skip-lines_test.sh
 create mode 100755 sh/tests/solutions/skip-lines.sh
 create mode 100644 subjects/skip-lines/README.md

diff --git a/sh/tests/skip-lines_test.sh b/sh/tests/skip-lines_test.sh
new file mode 100755
index 000000000..0ac11e4ac
--- /dev/null
+++ b/sh/tests/skip-lines_test.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+# Unofficial Bash Strict Mode
+set -euo pipefail
+IFS='
+'
+
+submitted=$(bash student/skip-lines.sh)
+expected=$(bash solutions/skip-lines.sh)
+
+diff <(echo "$submitted") <(echo "$expected")
diff --git a/sh/tests/solutions/skip-lines.sh b/sh/tests/solutions/skip-lines.sh
new file mode 100755
index 000000000..7898491f5
--- /dev/null
+++ b/sh/tests/solutions/skip-lines.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+ls -l | sed -n 'n;p'
diff --git a/subjects/skip-lines/README.md b/subjects/skip-lines/README.md
new file mode 100644
index 000000000..13e21e86b
--- /dev/null
+++ b/subjects/skip-lines/README.md
@@ -0,0 +1,47 @@
+## Skip lines
+
+### Instructions
+
+Write a command line in a `skip-lines.sh` file that prints the result of a `ls -l` skipping 1 line out of 2, starting with the **first** one.
+
+Example:
+
+```console
+User-> ls -l
+drwxr-xr-x 16 User User      4096 nov 11 10:55 Desktop
+drwxr-xr-x 22 User User      4096 nov  4 10:02 Documents
+drwxr-xr-x  6 User User      4096 nov 11 10:40 Downloads
+drwxr-xr-x  2 User User      4096 mar 31  2022 Music
+drwxr-xr-x  2 User User      4096 set 29 10:34 Pictures
+drwxr-xr-x  2 User User      4096 nov 23  2021 Public
+```
+
+What we want your script to do is:
+
+```console
+drwxr-xr-x 16 User User      4096 nov 11 10:55 Desktop
+drwxr-xr-x  6 User User      4096 nov 11 10:40 Downloads
+drwxr-xr-x  2 User User      4096 set 29 10:34 Pictures
+```
+
+**Tips:**
+
+Here are some Commands that can help you:
+
+- `sed`. Edit text in a scriptable manner. You can see also: awk. [For more information](https://www.gnu.org/software/sed/manual/sed.html).
+
+  - Print just a first line to stdout:
+    `{{command}} | sed -n '1p'`
+
+```console
+User-> cat file
+AIX
+Solaris
+Unix
+Linux
+HPUX
+User-> sed -n '1p' file
+AIX
+```
+
+Use man to see how `awk` or `sed` works, they can do the job.