Read a file in bash

Read a file line by line in bash

while read line           
do           
    echo $line

done < test.txt   

oneliner version

while read line ; do echo $line ; done < test.txt

Check if process is running in bash script

Check if process is running in bash script

#!/bin/bash

if [ -z "$(pgrep mysql)" ]
 then
     echo "Mysql is not running"     
 else
     echo "Mysql is running"
fi

Backup and restore mysql database

Make backup

mysqldump -u user -p password  | gzip > outputfile.sql.gz

Restore

gunzip < outputfile.sql.gz | mysql -u user -p password databasename

adapted from http://www.ducea.com/2006/10/28/compressing-mysqldump-output/