Rhcsa-- day one

One . Install the system

Two . Basic command summary

ip a see ip Address
ifconfig see ip Address
tty View the device file name of the current terminal
cat /etc/redhat-realse View operating system release information
uname -r View kernel version
pwd Show current directory path
hostname View the current full hostname
hostname HOSTNAME Temporarily change the host name while the current host is running . After changing the host name of the terminal prompt device, you need to exit and log in again
hostnamectl set-hostname HOSTNAME Change host name permanently vim /etc/hostname
passwd [USERNAME] Change or set the user's password
passwd -d [USERNAME] Delete user password

3、 ... and . Crack the code