Rhcsa day 1

One .Linux install

   

 

 

 

 

 

 

 

 

 

 

 

 

 

Two . Basic command summary

1.ip a(ip addr)=ifconfig    Show ip Address

2.tty  View the current terminal device file name

 3.cat /etc/redhat-realse   View operating system release information

4.pwd Show current directory path

 5.hostname View the current full hostname

 

 6.hostname   a( Changed hostname ）  Temporarily change the host name , After the change, you need to log in again , It will be invalid after restarting

7.uname -r     View kernel version

 8.hostnamectl set-hostname  a  Change host name permanently

               

 

9.passwd  [USERNAME]   Change or set the user's password
10.passwd -d  [USERNAME]   Delete user password  

3、 ... and . Reset the system password

Press down e

Ctrl+x