Ubuntu – How to log off an user from SSH?

ssh

I am able to see logged-in users via the who or last command.

How can I log off a particular user who login through SSH?

Best Answer

kill its ssh session. Check them by

ps aux | egrep "sshd: [a-zA-Z]+@"

Second column gives you the PID. Then,

sudo kill [-9] PID

Hope this helps.

ps: using the -9 flag will prevent things from stopping "graciously".

Related Solutions

Ubuntu – How login a user on desktop screen using ssh

After hours of searching in Google and trying different things I ended up with two ways to do this:

First make your user auto-login by creating file /etc/lightdm/lightdm.conf with this content:
```
[SeatDefaults]
autologin-user=YOUR_USERNAME
autologin-user-timeout=0
user-session=ubuntu
greeter-session=unity-greeter
```
^{(for more information How do I enable auto-login in LightDM?)}

Then you must restart lightdm using the command:
```
service lightdm restart
```
This results in lightdm logging automatically using your username. Now you can remove the file /etc/lightdm/lightdm.conf in order to disable auto-login for your user again.
You must first stop lightdm using the command:
```
service lightdm stop
```
then you must use the following command to start an x-session manually:
```
su - YOUR_USERNAME "startx -- :0 vt7" &
```
this command starts a new x-session logged in with your username on tty7, the default tty for lightdm. the & sign at the end detaches this process.

Note 1: if you receive an error saying

X: user not authorized to run the X server, aborting.

you must edit the file located at /etc/X11/Xwrapper.config and set allowed_users to anybody. After the start of the x-session you can return it to the previous value(normally console) for security reasons.

Note 2: If your x-session is showing only the desktop and not the unity panels, try removing files .config and .cache located at home folder of your user.

If you know any better ways or some improvement you might think is useful please share it here. Thank you.

Related Question

Ubuntu – How login a user on desktop screen using ssh