The basic linux system optimization

1.1 reserve a certain memory (512M) to prevent the system runs out of memory [not] Login

Clear information display system version 1.2

1.3 Close selinux

1.4 Changing yum source (if your own yum yum source can add your own source)

1.5 Changing the character set for the English character set

1.6 do alias (rm, grep) for the corresponding command

1.7 Setup command line history to retain the number of

1.8 Close iptables firewall

1.9 streamlining the boot from the start the service (leaving only the ssh | crond | network | rsyslog | sysstat)