Centos Essay Day 1

CentOS version View

View CentOS version: Cat/etc/porc/version or uname-a or uname-r

View Linux version: Cat/etc/issue or lsb_release-a (Note: This command is suitable for all versions of Linux)

Firewall

1 shutting down the firewall: service iptables stop

2 Start firewall: Service iptables start

3 Restart Firewall: Service iptables restart

4 View firewall Status: Service iptables status

5 Permanently shut down the firewall: chkconfig iptables off

6 enable after permanent shutdown: chkconfig iptables on

CentOS graphical interface and command line interface switch

Method 1: Run the command to the graphical interface #startx need to configure the graphical interface information first

Method 2: Modify the Id:3:initdefault in the/etc/inittab file, change 3 to 5, restart the system

Method 3:init 5

Entering the command line interface from the graphical interface: Init 3

Restart: Init 6

Shutdown: Init 0

Centos Essay Day 1