Linux simple commands

• Use command top to view the current time of the system, duration, number of online users, overall load situation, current number of processes,CPU, memory,Swap usage details, using the command ps-aux You can view the detailed status of each process

• Monitor software Cacti to see the real-time and historical traffic status of the server

• Use the command df-h to view the entire disk usage, and command Df-ih to view the inodes usage of the system

• Use the command to view the current logged in user, command last to view the history of user login record, command history to view historical operations record

• Use the command less/etc/passwd to view the user status of the system, whether there is a suspicious account and its UID and environment variables are normal

• Use the command Netstat-an |grep: to see the port on which the system is listening

Linux simple commands