Ubuntu ubuntu-other

You could use the command sort with the option --unique:

sort -u input-file

If you want to write result to FILE instead of standard...

Try re-installing sshd with a purge:

sudo apt-get remove --purge ssh-server
sudo apt-get install ssh-server

The most probable root cause is a botched config in...

Thanks for your suggestions. I think the problem was with my Flash plugin, and once I turned it off, I have not had Firefox crashing since. This does solve my problem, of course, but only...

Ubuntu 21.04 and later releases have a secure default, see this blog article (

sudo apt-get install fail2ban

sudo vim /etc/fail2ban/jail.conf