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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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Why disable ssh login with root on a server if I only log in with keys, not password? (sh.itjust.works)

submitted 1 day ago* (last edited 1 day ago) by [email protected] to c/[email protected]

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On a server I have a public key auth only for root account. Is there any point of logging in with a different account?

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[–] [email protected] 21 points 1 day ago (6 children)

Yes it's always better to login with a user and sudo so your commands are logged also having disable passwords for ssh but still using passwords for sudo gives you the best protection

[–] [email protected] 5 points 1 day ago* (last edited 1 day ago) (4 children)

Also double check that sudo is the right command, by doing which sudo. Something I just learned to be paranoid of in this thread.

Unless which is also compromised, my god…

[–] [email protected] 2 points 19 hours ago* (last edited 19 hours ago) (3 children)

which sudo will check $PATH directories and return the first match, true. however when you type sudo and hit enter your shell will look for aliases and shell functions before searching $PATH.

to see how your shell will execute 'sudo', say type sudo (zsh/bash). to skip aliases/functions/builtins say command sudo

meh nvm none of these work if your shell is compromised. you're sending bytes to the attacker at that point. they can make you believe anything

[–] [email protected] 1 points 17 hours ago (2 children)

Maybe if you escaped the command like \\type sudo?

[–] [email protected] 2 points 9 hours ago

no, if the attacker can change files in your account, they can read every byte you type in and respond with anything, including pretending to be a normal shell. im not sure how to prevent ssh from running commands in your shell

[–] [email protected] 1 points 17 hours ago

You assume the shell isn't compromised.

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