this post was submitted on 03 Jan 2025
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Which Linux command or utility is simple, powerful, and surprisingly unknown to many people or used less often?

This could be a command or a piece of software or an application.

For example I'm surprised to find that many people are unaware of Caddy, a very simple web server that can make setting up a reverse proxy incredibly easy.

Another example is fzf. Many people overlook this, a fast command-line fuzzy finder. It’s versatile for searching files, directories, or even shell history with minimal effort.

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[–] Jumuta@sh.itjust.works 101 points 2 weeks ago (6 children)

I think a lot of people don't realise that yt-dlp works for many sites, not just YouTube

I used it recently for watching a video from tiktok without having to use their god awful web UI and it was amazing

[–] GenderNeutralBro@lemmy.sdf.org 32 points 2 weeks ago (5 children)

Also works on Twitch with the added benefit of NOT playing ads (you still get breaks, just with a placeholder screen instead of the commercial).

mpv has yt-dlp support built in, so it can just play the streams directly.

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[–] pastel_de_airfryer@lemmy.eco.br 70 points 2 weeks ago (9 children)
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[–] bokherif@lemmy.world 52 points 2 weeks ago (5 children)

grep goes crazy if you know your regex

[–] Patchwork@lemmy.world 47 points 2 weeks ago (5 children)

jq - super powerful json parser. Useful by hand and in scripts

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[–] thejevans@lemmy.ml 43 points 2 weeks ago (4 children)
[–] deadcream@sopuli.xyz 17 points 2 weeks ago (2 children)

I use it occasionally but every time I need to do something a tiny bit more complex than "extract field from an object" I have to spend half an hour studying its manual, at which point it's faster to just write a Python script doing exactly what I need it to do.

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[–] Semi_Hemi_Demigod@lemmy.world 40 points 2 weeks ago (11 children)

I'm a big fan of screen because it will let me run long-running processes without having to stay connected via SSH, and will log all the output.

I do a lot of work on customers' servers and having a full record of everything that happened is incredibly valuable for CYA purposes.

[–] gkaklas@lemmy.zip 15 points 2 weeks ago

There is also zellij, which can do the same but also has modern functionality specific for development workspaces!

(Although screen or tmux will still probably be more widely available on remote machines etc)

[–] Static_Rocket@lemmy.world 15 points 2 weeks ago (7 children)

I'd recommend tmux for that particular use. Screen has a lot of extras that are interesting but don't really follow the GNU mentality of "do one thing and do it well."

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[–] davel@lemmy.ml 39 points 2 weeks ago

The pipe (|), which if you think about it is the basis for function composition.

[–] jaxiiruff@lemmy.zip 38 points 2 weeks ago* (last edited 2 weeks ago) (35 children)

nano was and still is vital to me learning and using linux, I will not learn how to use vim so if the distro forces it to be default im not using it.

Why is editing text so convoluted for seemingly no reason.. also hate that vim must be used for certain files.

[–] olafurp@lemmy.world 37 points 2 weeks ago (4 children)

You can change your hate to love by using vim

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[–] lordnikon@lemmy.world 22 points 2 weeks ago

You can change that by changing your editor global variable

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[–] jollyroberts@jolly-piefed.jomandoa.net 36 points 2 weeks ago (5 children)

Control+r == search through your bash history.

I used linux for ten years before finding out about that one.

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[–] wasabi@lemmy.eco.br 34 points 2 weeks ago (3 children)

I find myself using tldr a lot since finding out about it. It's just so useful for commands that I don't use enough to commit to memory.

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[–] Sickday@kbin.earth 33 points 2 weeks ago (1 children)
[–] BaumGeist@lemmy.ml 14 points 2 weeks ago (2 children)
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[–] hperrin@lemmy.ca 30 points 2 weeks ago (2 children)

I know tmux is incredibly popular, but a good use case for it that isn’t common is teaching people how to do things in the terminal. You can both be attached to the same tmux session, and both type into the same shell.

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[–] WalnutLum@lemmy.ml 29 points 2 weeks ago (2 children)
bc

It's a simple command line calculator! I use it all the time.

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[–] harsh3466@lemmy.ml 29 points 2 weeks ago (5 children)

zoxide. It's a fabulous cd replacement. It builds a database as you navigate your filesystem. Once you've navigated to a directory, instead of having to type cd /super/long/directory/path, you can type zoxide path and it'll take you right to /super/long/directory/path.

I have it aliased to zd. I love it and install it on every system

You can do things like using a partial directory name and it'll jump you to the closest match in the database. So zoxide pa would take you to /super/long/directory/path.

And you can do partial paths. Say you've got two directories named data in your filesystem.

One at /super/long/directory/path1/data

And the other at /super/long/directory/path2/data

You can do zoxide path2 data and you'll go to /super/long/directory/path2/data

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[–] friend_of_satan@lemmy.world 29 points 2 weeks ago* (last edited 2 weeks ago) (2 children)

Not powerful, but often useful, column -t aligns columns in all lines. EG

$ echo {a,bb,ccc}{5,10,9999,888} | xargs -n3
a5 a10 a9999
a888 bb5 bb10
bb9999 bb888 ccc5
ccc10 ccc9999 ccc888
$ echo {a,bb,ccc}{5,10,9999,888} | xargs -n3 | column -t
a5      a10      a9999
a888    bb5      bb10
bb9999  bb888    ccc5
ccc10   ccc9999  ccc888
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[–] digdilem@lemmy.ml 27 points 2 weeks ago (17 children)

yes

The most positive command you'll ever use.

Run it normally and it just spams 'y' from the keyboard. But when one of the commands above is piped to it, then it will respond with 'y'. Not every command has a true -y to automate acceptance of prompts and that's what this is for.

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[–] lig@lemmings.world 24 points 2 weeks ago (2 children)

I don't see anyone mentions htop. So, I will:) Just works, could be installed in any distro. Much more friendly than top but isn't bloated with features as some other alternatives are.

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[–] BCsven@lemmy.ca 21 points 2 weeks ago (1 children)

CTRL-L to clear your terminal output. Or type clear

[–] danielquinn@lemmy.ca 15 points 2 weeks ago

Also Ctrl+D to exit any shell and Ctrl+R for reverse searching your history!

[–] eldereko@lemmy.dbzer0.com 21 points 2 weeks ago* (last edited 2 weeks ago) (8 children)

+1 for Caddy, completely replaced nginx. also...

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[–] UpperBroccoli@lemmy.blahaj.zone 20 points 2 weeks ago (3 children)

yq is crazy cool for converting between different text-based data formats such as yaml, json, xml, csv and others, and it has a super nice pretty-printing function as well. I use it all the time!

Just be aware that your distroy might come with a yq variant too, but possibly one that isn't as powerful as the one I linked. I know this to be true at least for Ubuntu.

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[–] beeng@discuss.tchncs.de 20 points 2 weeks ago (1 children)

Using rust rewrite of coreutils you can cp -g to see progress. Set an alias :)

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[–] Lettuceeatlettuce@lemmy.ml 20 points 2 weeks ago

tmux - makes managing remote SSH sessions a breeze.

tomb - A little FOSS encryption utility that runs in the CLI. Easy, cute, effective. Tomb Utility

[–] bamboo@lemmy.blahaj.zone 19 points 2 weeks ago (3 children)

dd is probably well known, but one of the simplest and most powerful ways to accidentally delete all data on your hard drive. dd if=/dev/random of=/dev/sda

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[–] sirico@feddit.uk 18 points 2 weeks ago (2 children)
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[–] whelk@lemm.ee 18 points 2 weeks ago

I love ncdu for seeing where all my storage is being taken up.

[–] Lemmchen@feddit.org 17 points 2 weeks ago (2 children)
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socat - connect anything to anything

for example

socat - tcp-connect:remote-server:12345

socat tcp-listen:12345 -

socat tcp-listen:12345 tcp-connect:remote-server:12345

[–] GenderNeutralBro@lemmy.sdf.org 17 points 2 weeks ago

vd (VisiData) is a wonderful TUI spreadsheet program. It can read lots of formats, like csv, sqlite, and even nested formats like json. It supports Python expressions and replayable commands.

I find it most useful for large CSV files from various sources. Logs and reports from a lot of the tools I use can easily be tens of thousands of rows, and it can take many minutes just to open them in GUI apps like Excel or LibreOffice.

I frequently need to re-export fresh data, so I find myself needing to re-process and re-arrange it every time, which visidata makes easy (well, easier) with its replayable command files. So e.g. I can write a script to open a raw csv, add a formula column, resize all columns to fit their content, set the column types as appropriate, and sort it the way I need it. So I can do direct from exporting the data to reading it with no preprocessing in between.

[–] ClusterBomb@lemmy.blahaj.zone 16 points 2 weeks ago (1 children)

Discovered about rg recently and it is cool!

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[–] Presi300@lemmy.world 16 points 2 weeks ago* (last edited 2 weeks ago)

ddccontrol... it looks complicated on the surface but it's really not and being able to control monitor brightness without fcking around in some garbage monitor OSD is a god sent and should be the standard

[–] turbowafflz@lemmy.world 16 points 2 weeks ago (1 children)

I'm not sure how underrated it is but the exec feature in find is so useful, there are so many bulk tasks that would just be incredibly difficult otherwise but instead are just one line

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[–] AnnaFrankfurter@lemmy.ml 15 points 2 weeks ago (3 children)
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[–] jagged_circle@feddit.nl 14 points 2 weeks ago
[–] AllHailTheSheep@sh.itjust.works 14 points 2 weeks ago

probably well known at this point but rsync is incredible and I use it all the time

[–] Matombo@feddit.org 14 points 2 weeks ago

kde connect

[–] helmet91@lemmy.world 13 points 2 weeks ago* (last edited 2 weeks ago) (5 children)

Use less for checking contents of files. Many people use cat all the time, but I don't like it, because if you do that often, your terminal window quickly gets flooded with stuff, and then you have to scroll up and down if you wanna see a previous output. With less, your file opens in a different "frame", which you can close when you're done.

[–] razorozx@lemm.ee 16 points 2 weeks ago

I'd like to interject for a moment. There is also a tool called bat that is just cat with extra features. It prints out and works just like cat, but when the contents get too big, it works like less. The is syntax highlighting and works with git.

It's replaced my need for cat and less.

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