#ps #process status
#ps -le # process status with priority
#pstree #displays the number of process
#pstree -p #display each user‘s PID
#pstree -pu
#top #check system health, dynamic information
#w #check current login user
#jobs -l #check backend running process
#vmstat #monitor system resource
#dmesg | grep cup #check hardware status
#cat /proc/cupinfo
#time
#uname
-a all infor
-r knele
-s check name
#lsb_release -a
#lsof lsof -c service_name # check which files are used by this service
#lsof -u user_name #check which files are used by this user
原文：https://www.cnblogs.com/ngtest/p/9231604.html