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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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What are some of your most useful or favorite terminal commands? (piefed.social)

submitted 1 month ago by marighost@piefed.social to c/linux@lemmy.ml

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I've been setting up a new Proxmox server and messing around with VMs, and wanted to know what kind of useful commands I'm missing out on. Bonus points for a little explainer.

Journalctl | grep -C 10 'foo' was useful for me when I needed to troubleshoot some fstab mount fuckery on boot. It pipes Journalctl (boot logs) into grep to find 'foo', and prints 10 lines before and after each instance of 'foo'.

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[–] gangrif@social.undrground.org 2 points 1 month ago

@marighost I dont use Prox, but for various random linux commands.. ive got a wealth. :D in the journalctl vein.

journalctl -xeu \<service name\>

ex: journalctl -xeu httpd

Gives you the specific journal output for the given service. In this example. httpd.

Also, journalctl is more than boot logs, its all of your logs from anything controlled by systemd. Mounts, services, timers, even sockets.

For example. On my system, i have /var/home as a mount. systemctl and journalctl can give me info on it with:

systemctl status var-home.mount
journalctl -xeu var-home.mount

You can see all of the mounts with.
systemctl list-units --type=mount

Or, see all of your services with
systemctl list-units --type=service

Or all of your timers with
systemctl list-timers

We do a weekly show on getting into linux terminals, commands, tricks, and share our experience.. It's called Into the Terminal. on the Red Hat Enterprise Linux youtube channel. I'll send you a link if you're interested.