如何查看系统有哪些进程？（ ps,top指令）

2.如何查看系统有哪些进程？

指令：ps

[email protected]_Learn:~$ ps
  PID TTY          TIME CMD
 3881 pts/2    00:00:00 bash
 4120 pts/2    00:00:00 ps

但这只能查看部分的进程信息，可以通过ps -aux 查看全部进程信息。

[email protected]_Learn:~$ ps -aux
Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.1  24608  2552 ?        Ss   13:18   0:01 /sbin/init
root         2  0.0  0.0      0     0 ?        S    13:18   0:00 [kthreadd]
root         3  0.0  0.0      0     0 ?        S    13:18   0:00 [ksoftirqd/0]
root         5  0.0  0.0      0     0 ?        S<   13:18   0:00 [kworker/0:0H]
.
.
.

可以通过指令组合管道过滤查看某个进程的信息 ps -aux|grep bash

[email protected]_Learn:~$ ps -aux|grep bash
Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html
CLC       3105  0.0  0.2  27864  4848 pts/0    Ss+  13:56   0:00 bash
CLC       3372  0.0  0.4  31756  8808 pts/1    Ss+  13:57   0:00 -bash
CLC       3881  0.0  0.4  31752  8800 pts/2    Ss   14:27   0:00 -bash
CLC       4124  0.0  0.0  13588   940 pts/2    R+   16:15   0:00 grep --color=auto bash

通过指令top可以实时看看进程信息，相当于windows的任务管理器

@Embed_Learn:~$ top
top - 16:19:31 up  3:01,  4 users,  load average: 0.00, 0.01, 0.05
Tasks: 330 total,   3 running, 327 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.2%us,  0.7%sy,  0.0%ni, 99.2%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   1905156k total,  1060652k used,   844504k free,    95028k buffers
Swap:  5998588k total,        0k used,  5998588k free,   483808k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                        
 2798 CLC        9 -11  418m 5956 4144 S    2  0.3   3:12.62 pulseaudio                      
 1404 root      20   0  203m  49m  11m S    1  2.6   0:48.73 Xorg                            
 2787 CLC       20   0 1166m  70m  35m R    1  3.8   0:53.31 compiz                          
 1996 root      20   0 93656 4600 3728 S    0  0.2   0:09.16 vmtoolsd