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There is @-sign in front of my raspbian-bash-prompt (headless) which I can't determine where it is coming from.

$ ssh pi@raspberrypi
Linux raspberrypi 4.14.98+ #1200 Tue Feb 12 20:11:02 GMT 2019 armv6l
(...)
@pi@raspberrypi:~$ bash --version
GNU bash, version 4.4.12(1)-release (arm-unknown-linux-gnueabihf)
(...)
@pi@raspberrypi:~ $ echo $PS1
\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w \$\[\033[00m\]

It seems only to be there for the user pi and seems not to be part of the $PS1 variable, but it vanishes when i unset the variable.

@pi@raspberrypi:~ $ unset PS1
export PS1="prompt> "
@prompt> sudo su - lisa
lisa@raspberrypi:~ $ exit
logout
@prompt> 

I temporarily (re)moved .profile, .bashrc, /etc/profile and /etc/bash.bashrc with the expected result except of the still leading @-sign

@-bash-4.4$ 

Another wild guess was, that it has to do with if I'm using an SSH-Key-File or if the user is part of the sudo group (because both is only the case for my pi user), but that's also not the case. This raspbian-installation is in use for a couple of years and I played a lot around with it, so it is definitly possible that it has to do with something I changed.

marked as duplicate by muru, Jeff Schaller bash Jun 20 at 12:34

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