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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're some of the dumbest things you've done to yourself in Linux? (lemmy.ca)

submitted 7 months ago by danielquinn@lemmy.ca to c/linux@lemmy.ml

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I'm working on a some materials for a class wherein I'll be teaching some young, wide-eyed Windows nerds about Linux and we're including a section we're calling "foot guns". Basically it's ways you might shoot yourself in the foot while meddling with your newfound Linux powers.

I've got the usual forgetting the . in lines like this:

$ rm -rf ./bin

As well as a bunch of other fun stories like that one time I mounted my Linux home folder into my Windows machine, forgot I did that, then deleted a parent folder.

You know, the war stories.

Tell me yours. I wanna share your mistakes so that they can learn from them.

Fun (?) side note: somehow, my entire ${HOME}/projects folder has been deleted like... just now, and I have no idea how it happened. I may have a terrible new story to add if I figure it out.

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[–] czardestructo@lemmy.world 16 points 7 months ago (2 children)

Deleted the certs from the sshd daemon which locked me out of a remote server that required and a 2 hour drive to fix.

[–] onlinepersona@programming.dev 3 points 7 months ago (1 children)

Wonderful. Just like deleting all the iptables rules with a default DENY rule in place *chef's kiss*. Required calling the service provider to enable a remote console over HTTPS (it was a manual action for them... supposedly).

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[–] Danitos@reddthat.com 1 points 7 months ago* (last edited 7 months ago) (1 children)

I'm curious: Is it a bad idea to have iptables with a default DENY rule? I use a deafult DENY in ufw, and it uses iptables under the hood.

[–] chM5tZ8zMp@lemmy.sdf.org 3 points 7 months ago

No, it's only a bad idea if nothing else is allowed.

[–] possiblylinux127@lemmy.zip 1 points 7 months ago

This is why we use ufw or firewalld. If nothing else setup an undo button