Automatic updates are done all the time on the computers. When the system kernel (Linux) is updated the system may need to be rebooted, but to minimize inconvenience for you it will not restart at once, but instead tell you about it (by mail) and wait for you to logout first.
It is important that you do this as soon as possible. Kernel updates are sometimes because of newly discovered security problems, with varying degree of graveness. If you don’t have specific knowledge about which kernel update it is about and what the changes in it are, it is good to assume the worst case scenario, which is a very important security update.
If several users are logged in the restart won’t happen until
everyone has logged out. On
tempus you can get information about when the
computer has been restarted by creating a file named as your
username in the directory
You can check and remove the processes you are running on a
ssh without going to it.
Say for example that your username is
ellen and you get
a message that you are logged in to
One way to see from another computer belonging to the system what
processes you have running on
ssh futurum pstree -p ellen
You can kill all your processes there with:
ssh futurum killall -u ellen
To do this from a computer that is not part of our system you need
to start with
ssh email@example.com instead.
ellen is your username in the examples. Use your
actual username! And use the actual name of the computer and
This is too much trouble for me!
If you create a file
.restart_my_computer in your home
directory you are exempt from this. If the computer needs to be
restarted it will be restarted instead of waiting for you to logout