Knowledge Base:Shutdown after emerge
Emerge is not running
This command shuts down the computer only if emerge finishes successfully, it also saves output to a emerge-log.log file in the current directory that you can reviewed next time the computer boots. For example for updating and shutting down we have:
emerge --verbose --deep --newuse --update --with-bdeps=y @world | tee emerge-log.log && shutdown -h now
If you want to turn off the computer only if emerge quits successfully:
emerge --verbose --deep --newuse --update --with-bdeps=y @world | tee emerge-log.log ; shutdown -h now
If you are using KDE, it may be a good idea to have KDE logout first before the shutdown process begins. To do this, type:
emerge PACKAGE && kdeinit_shutdown && poweroff
Emerge is already running
If emerge is already running, press ctrl-z. The process will be paused
+ Stopped emerge kdebase-meta
bg && wait && poweroff
bg resumes executing of emerge in the background. wait waits for last command sent to background to terminate. When emerge finishes with success, poweroff command will be executed.
This can be accomplish in a similar way by pausing the process with ctrl-z as described above and then typing this:
fg && poweroff
This continues the paused process and after this process finishes it continues the next command (poweroff) ...
It is important to notice that && will only continue with the next command, if the first command completed successfully. && is the logical AND operator of the shell. By using ; the next command will be executed no matter what happened earlier. ; is only a command separator.
A variant of this can be used to play a sound when emerge is done.
fg; aplay whateversoundfile
The fg variant is a little more straight forward probably.