ps aux的功能是打印出所有進程
ps是最基本也是最強大的進程查看命令
aux都是參數
a = show processes for all users 顯示所有用戶的進程
u = display the process's user/owner 顯示用戶
x = also show processes not attached to a terminal 顯示無控制終端的進程
在下面即將介紹的axo中
o = 格式，用戶定義的
1) Displaying top 10 CPU_consuming processes: 展示消耗CPU最多的10個進程
# ps aux|head -1; ps aux|sort -rn +2|head -10
2) Displaying top 10 memory-consuming processes: 展示消耗內存最多的10個進程
# ps aux|head -1; ps aux|sort -rn +3|head
To view custom columns we use the below command
[root@server ~]# ps axo stat,euser,ruser,%mem,pid,%cpu,comm
Here
stat -> status of the process
euser -> effective user
ruser -> real user
%mem -> percentage of memory utilized by process
pid -> process ID
%cpu -> percentage of memory utilized by process
comm -> command
To view top 10 memory utilized process process
[root@server ~]# ps axo ruser,%mem,comm,pid,euser | sort -nr | head -n 10
RUSER %MEM COMMAND PID EUSER
root 0.4 sshd 3189 root
root 0.4 sshd 2486 root
root 0.2 master 1194 root
root 0.1 rsyslogd 2918 root
root 0.1 ps 3355 root
root 0.1 login 1217 root
root 0.1 bash 3191 root
root 0.1 bash 3080 root
root 0.1 bash 2488 root
To view top 10 memory utilized process process
[root@server ~]# ps axo ruser,%cpu,comm,pid,euser | sort -nr | head -n 10
RUSER %CPU COMMAND PID EUSER
root 0.2 events/0 7 root
root 0.0 watchdog/0 6 root
root 0.0 vsftpd 1118 root
root 0.0 vmmemctl 593 root
root 0.0 usbhid_resumer 41 root
root 0.0 udevd 420 root
root 0.0 udevd 1235 root
root 0.0 udevd 1234 root
root 0.0 sync_supers 13 root