$sudo apt-get update
$sudo aptitude update
$sudo aptitude safe-upgrade
$sudo aptitude full-upgrade
Install Package
$sudo apt-get
Remove Package
$sudo apt-get autoremove
$sudo apt-get remove
Install NTP Server
$sudo apt-get ntp
Install MySql
$sudo aptitude install mysql-client mysql-server
Install Poppassd (poppassd for change the password by script)
$sudo apt-get install poppassd
Install Postfix
$sudo aptitude install postfix
Reconfig posfix
$sudo dpkg-reconfigure postfix
By default postfix set type mail store to “mailbox” but, can set to “MailDir” by add the line to “main.cf” as command
$sudo postconf -e ‘home_mailbox = Maildir/’
Restart Posfix service
$sudo /etc/init.d/postfix restart
Change password only one line
sudo usermod -p `mkpasswd -m SHA-512
sudo echo “