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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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Sync bash aliases and ssh keys across devices (lemdro.id)

submitted 11 months ago by [email protected] to c/[email protected]

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How do you guys quickly sync your settings (especially bash aliases and ssh keys) across your machines?

Ideally i want a simple script to run on every new server I work with. Any suggestions?

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[–] [email protected] 2 points 11 months ago (1 children)

If the keys are password protected.... eh why not sync them.

Also ssh certificates are a thing, they make doing that kind of stuff way easier instead of updating known hosts and authorized keys all the time

[–] [email protected] 1 points 11 months ago (1 children)

Passwords will be brute forced if it can be done offline.

Private SSH keys should never leave a machine. If a key gets compromised without you knowing, in worst case you will revoke the access it has once the machine's lifespan is over. If you copy around one key, it may get compromised on any of the systems, and you will never revoke the access it has.

And you may not want to give all systems the same access everywhere. With one key per machine, you can have more granularity for access.

[–] [email protected] 1 points 11 months ago

Passwords will be brute forced if it can be done offline.

Set a good high entropy password, you can even tie it to your login password with ssh-agent usually

Private SSH keys should never leave a machine.

If this actually matters, put your SSH key on a yubikey or something

If a key gets compromised without you knowing, in worst case you will revoke the access it has once the machine’s lifespan is over.

People generally don't sit on keys, this is worthless. Also knowing people I've worked with... no, they won't think to revoke it unless forced to

and you will never revoke the access it has.

Just replace the key in authorized_keys and resync

And you may not want to give all systems the same access everywhere

One of the few reasons to do this, though this tends to not match "one key per machine" and more like "one key per process that needs it"

Like yeah, it's decent standard advice... for corporate environments with many users. For a handful of single-user systems, it essentially doesn't matter (do you have a different boot and login key for each computer lol, the SSH keys are not the weak point)