Useful commands - Revision history

Teeth: /* funky things you can do in the shell */ && : &

2026-05-16T17:48:37Z

funky things you can do in the shell: && : &

← Older revision		Revision as of 18:48, 16 May 2026
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	== funky things you can do in the shell ==		== funky things you can do in the shell ==
	~~some of the things you can do in~~ the shell ~~even without commands~~		the shell has a lot of funky features!!

	=== put stuff in a file ===		=== put stuff in a file ===
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	<code>cat long_file.txt \| tail -n 50 \| grep "keyword"</code>		<code>cat long_file.txt \| tail -n 50 \| grep "keyword"</code>

			=== run multiple commands at once ===
			You can have one command run only if another one succeeds by chaining them together with <code>&&</code>. If you don't care whether the first command succeeds, you can use <code>;</code> instead.

			You can run a command in the background by putting <code>&</code> after it. Just be careful cuz a command running in the background can't be stopped like normal with <code>Ctrl+C</code>. Instead, you'll need to find it's PID and use the <code>kill</code> command.

	== paths ==		== paths ==

Teeth: navigation, paths, pipes, and more

2026-05-16T17:38:28Z

navigation, paths, pipes, and more

@@ Line 2: / Line 2: @@
 == by category ==
 === media ===
 {| class="wikitable"
@@ Line 13: / Line 25: @@
 | <code>yt-dlp</code> || <code>yt-dlp <nowiki>https://youtu.be/INa_SYywZis</nowiki></code> || download videos & audio from [[YouTube]] and [[List of Platforms that pronounmail.com has Outlived|other platforms]]
 |}
 === text ===
 {| class="wikitable"
@@ Line 84: / Line 97: @@
 | <code>man</code> || <code>man git</code> || command usage details
 |}
 [[Category:Pages with some amount of information in them]]

Teeth: a few commands 2 get u started

2026-05-16T16:21:49Z

a few commands 2 get u started

New page

[[computer]]s have so many commands! it is hard to remember them all. hopefully this page can help for the next time you are staring nervously at the [[Shell Access|shell]].

== by category ==
=== media ===
{| class="wikitable"
|-
! command !! example !! description
|-
| <code>magick</code> || <code>magick in.png out.jpg</code> || convert image files
|-
| <code>ffmpeg</code> || <code>ffmpeg -i in.mov out.mp4</code> || convert video and audio files
|-
| <code>yt-dlp</code> || <code>yt-dlp <nowiki>https://youtu.be/INa_SYywZis</nowiki></code> || download videos & audio from [[YouTube]] and [[List of Platforms that pronounmail.com has Outlived|other platforms]]
|}
=== text ===
{| class="wikitable"
|-
! command !! example !! description
|-
| <code>cat</code> || <code>cat in.txt</code> || print out a file
|-
| <code>less</code> || <code>less in.txt</code> || page through a file
|-
| <code>head</code> || <code>head -n 5 in.txt</code> || view the beginning of a file
|-
| <code>tail</code> || <code>tail -n 5 in.txt</code> || view the end of a file
|-
| <code>grep</code> || <code>grep "search" in.txt</code> || search a file for some text
|-
| <code>sed</code> || <code>sed -i 's/old/new/' in.txt</code> || find and replace text in a file
|-
| <code>nano</code> || <code>nano out.txt</code> || a pretty simple text editor, like the "Notepad" of linux
|-
| <code>emacs</code> || <code>emacs out.txt</code> || a really powerful text editor that's a bit harder to use
|-
| <code>vim</code> || <code>vim out.txt</code> || an unhinged text editor that some people have opinions about
|}

=== web ===
{| class="wikitable"
|-
! command !! example !! description
|-
| <code>wget</code> || <code>wget <nowiki>http://a.horse/disc.iso</nowiki></code> || download a file
|-
| <code>curl</code> || <code>curl <nowiki>http://ip.me</nowiki></code> || send a HTTP request to a server
|-
| <code>caddy</code> || <code>caddy run</code> || host a web server
|-
| <code>php8.4</code> || <code>php8.4 page.php</code> || run a php script and check it for errors
|}

=== network ===
{| class="wikitable"
|-
! command !! example !! description
|-
| <code>dig</code> || <code>dig pronounmail.com</code> || lookup DNS records for a domain
|-
| <code>nslookup</code> || <code>nslookup pronounmail.com</code> || lookup DNS name server for a domain
|-
| <code>ping</code> || <code>ping pronounmail.com</code> || check if two computers can see each other
|-
| <code>lsof</code> || <code>lsof -i -P -n</code> || list open ports on the current machine
|}

=== services ===
{| class="wikitable"
|-
! command !! example !! description
|-
| <code>systemctl</code> || <code>systemctl status my_unit</code> || start/stop/check statuses of services
|-
| <code>journalctl</code> || <code>journalctl -xeu my_unit</code> || check logs for a service
|}

=== help ===
{| class="wikitable"
|-
! command !! example !! description
|-
| <code>tldr</code> || <code>tldr git pull</code> || command usage examples
|-
| <code>man</code> || <code>man git</code> || command usage details
|}

[[Category:Pages with some amount of information in them]]