1. The system-state detecting command
ifconfig
See card name, IP address, MAC address, RX receives the data packet, TX data packet transmission
uname
View system kernel and system version and other information
uptime
Check the system load information
free
Check the amount of memory used in the system of information about the current
who
See channel currently logged in user host terminal
last
Log in to view all records system
history
View history execute the command
sosreport
Command is used to collect system configuration and schema information and diagnostic output document
2. Change the working directory command
pwd
Which displays the user's current working directory
Change the working directory
Cd Change directory
Cd ~ home directory
cd .. go to previous
cd - return a directory
ls command
View the file in the directory
