Ubuntu | Cookbook
User and Groups
Change users name
exec sudo -i killall -u [oldname] id [oldname] usermod -l [newname] [oldname] groupmod -n [newname] [oldname] usermod -d /home/[newname] -m [newname] usermod -c "[full name (new)]" [newname] id [newname]
Change Runlevel
The systemctl isolate is temporary way. To make it permanent you have to use systemctl set-default as shown below:
sudo systemctl set-default multi-user.target
and reboot.
To revert graphical session use
sudo systemctl set-default graphical.target
Package management
| apt-get update | refresh available updates |
| apt-get upgrade | upgrade with package replacements; |
| apt-get dist-upgrade | upgrade Ubuntu version |
| apt-get install pkg | install pkg |
| apt-get purge pkg | uninstall pkg |
| apt-get autoremove | Remove obsolete packages |
apt-get -f install | try to fix broken packages |
| dpkg -i pkg.deb | install file pkg.deb (file) |
dpkg --configure -a | try to fix broken packages |
Info about the system
ls_release -a | Find out used version |