Linux initialization Configuration---hostname, shutdown firewall, turn off SELinux

I. Modifying host names

1. Zero modification

[Email protected] network-scripts]# hostname jw07

And then you can see that our hostname has been modified.

2. Permanently modify the host name

[Email protected]/]# Hostnamectl set-hostname Liutao

Restart CentOS to see the changes

Two. How to turn off the CentOS firewall

1. Zero-off

[Email protected] ~]# Systemctl stop Firewalld.service

We can view the firewall status to see if the shutdown was successful

[Email protected] ~]# Firewall-cmd--state
Not running

2. Permanently closed

[Email protected] ~]# systemctl disable Firewalld.service

This command to understand that the boot does not start the firewall, then the boot is not started is it a permanent shutdown?

Third, close SELinux

1. Zero-off

[Email protected] ~]# Setenforce 0

2. Permanently close (Modify config file)

[Email protected] ~]# Vi/etc/selinux/config

The last reboot can

You can view the status to see if it is turned off

[Root@liutao ~]# Sestatus
SELinux Status: disabled

Linux initialization Configuration---hostname, shutdown firewall, turn off SELinux