Bash Snippets

A few useful (or pointless) Bash snippets that come in handy every now and then. Have fun with them.

Create a complete MySQL dump

mysqldump -u root -p -A -R -E --triggers --single-transaction > full_backup.sql

Detach a process from the terminal

nohup sh -c '$1' &

Find the PID of a process

ps -ax | grep $1 | grep -v ' grep '

Shutdown timer

sudo shutdown -h +$1

Limit CPU

Sometimes you don't want to give a process the highest priority. That's where "nice" and "renice" come in handy. With "nice" we start a new process ($command) with a chosen priority ($niceness).

nice -n $niceness $command

With "renice" we set the priority of a process that is already running.

renice $niceness $options

Possible options are:

• -p PID: select the process by its process ID
• -u USER: limit the processes of the user USER
• -g GROUPID: select all processes with the process group ID GROUPID