Tracking Down Ubuntu BASH Session Closing

dafyre

@scottalanmiller said in Tracking Down Ubuntu SSH Session Closing:

Just tested one and I logged in and within two seconds it had logged me out again.

Could it be some strange cron job or something? Or did this start after a system upgrade?

IRJ

Can you scp files?

IRJ

I would try to download some config files so I could look at them

scottalanmiller

@IRJ said in Tracking Down Ubuntu SSH Session Closing:

Can you scp files?

I'm sure that I can. I'll get some.

scottalanmiller

@dafyre said in Tracking Down Ubuntu SSH Session Closing:

@scottalanmiller said in Tracking Down Ubuntu SSH Session Closing:

Just tested one and I logged in and within two seconds it had logged me out again.

Could it be some strange cron job or something? Or did this start after a system upgrade?

Could be, definitely. But I looked and haven't found one.

scottalanmiller

Created a new user from scratch. Same issue just seconds after first login.

scottalanmiller

I'm pretty sure that it is not SSH related, because sudo sessions get closed, too.

scottalanmiller

I've switched my shell to zsh and so far, no logouts.

scottalanmiller

If I use zsh, I'm good. If I enter BASH from zsh, I get kicked out after several seconds. Definitely is something to do with BASH.

scottalanmiller

@IRJ TMOUT variable never appears in /etc

scottalanmiller

I manually set the TMOUT variable to 0 to disable it, and it still happens. So that is not what is being used.

scottalanmiller

Tried disabling AppArmor, but that did nothing.

IRJ

https://askubuntu.com/questions/404424/how-do-i-restore-bashrc-to-its-default#404428

IRJ

Try this command first to bypass bash settings

ssh -t <host> dash

scottalanmiller

@IRJ said in Tracking Down Ubuntu BASH Session Closing:

Try this command first to bypass bash settings

ssh -t <host> dash

Using ZSH is what I am doing, works fine, too.

scottalanmiller

@IRJ said in Tracking Down Ubuntu BASH Session Closing:

https://askubuntu.com/questions/404424/how-do-i-restore-bashrc-to-its-default#404428

Pretty confident that it is none of those. They are all vanilla.

scottalanmiller

@IRJ brand new users have the issue, too.

JaredBusch

@scottalanmiller said in Tracking Down Ubuntu BASH Session Closing:

@IRJ brand new users have the issue, too.

Doesn't bash have a global default config that applies to all users?

black3dynamite

@JaredBusch said in Tracking Down Ubuntu BASH Session Closing:

@scottalanmiller said in Tracking Down Ubuntu BASH Session Closing:

@IRJ brand new users have the issue, too.

Doesn't bash have a global default config that applies to all users?

Ubuntu 18.04.2
/etc/profile and /etc/bash.bashrc

Fedora 30
/etc/profile and /etc/bashrc

scottalanmiller

@JaredBusch said in Tracking Down Ubuntu BASH Session Closing:

@scottalanmiller said in Tracking Down Ubuntu BASH Session Closing:

@IRJ brand new users have the issue, too.

Doesn't bash have a global default config that applies to all users?

It has one, yes. But it's vanilla. And even removing it, no change.