ps aux的功能是打印出所有进程

ps是最基本也是最强大的进程查看命令

aux都是参数

a = show processes for all users 显示所有用户的进程
u = display the process's user/owner 显示用户
x = also show processes not attached to a terminal 显示无控制终端的进程

在下面即将介绍的axo中

o = 格式，用户定义的 

1) Displaying top 10 CPU_consuming processes: 展示消耗CPU最多的10个进程

# ps aux|head -1; ps aux|sort -rn +2|head -10

2) Displaying top 10 memory-consuming processes: 展示消耗内存最多的10个进程

# 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

Reference：

http://www.360doc.com/content/12/0405/19/1671317_201194366.shtml

http://www.unixmantra.com/2013/07/top-12-ps-performance-commands.html

http://easylinuxtutorials.blogspot.com/2013/10/how-to-find-top-10-cpu-memory-consuming.html