系统状进程和内存状态的命令

  1. ps:用于查看系统中的进程状态
    ps +参数
    -a 显示所有进程
    -u 用户以及其他详细信息
    -x显示没用控制中端的进程
    5种常见的进程状态:R运行,S中断,D不可中断,Z僵死,T停止
[root@localhost test]# ps -u
USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root      11889  0.2  1.3 249560 25292 tty1     Ss+  10:18   0:44 /usr/bin/Xorg 
root      13844  0.0  0.1 116924  3616 pts/0    Ss   10:27   0:02 /bin/bash
root      72700  0.0  0.1 209924  3232 pts/0    S    13:29   0:00 su - liumaojin
root      73818  0.0  0.1 209924  3620 pts/0    S    13:35   0:00 su - root
root      73823  0.0  0.1 116696  3424 pts/0    S    13:35   0:00 -bash
root      75974  0.0  0.1 209924  3192 pts/0    S    14:08   0:00 su liumaojing
root      76962  0.0  0.1 209924  3624 pts/0    S    14:32   0:00 su root
root      76967  0.0  0.1 116924  3580 pts/0    S    14:32   0:00 bash
root      77093  0.0  0.1 209920  3192 pts/0    S    14:33   0:00 su liumaojing
root      81208  0.0  0.1 209920  3624 pts/0    S    15:33   0:00 su root
root      81212  0.1  0.1 116804  3456 pts/0    S    15:33   0:00 bash
root      81298  0.0  0.0 139492  1648 pts/0    R+   15:35   0:00 ps -u

  1. top:用于动态地监视进程活动与系统负载信息等,相当于看作Windows下的任务管理器
top

top - 10:19:59 up  5:26,  2 users,  load average: 0.23, 0.14, 0.08
Tasks: 504 total,   3 running, 501 sleeping,   0 stopped,   0 zombie
%Cpu(s):  8.9 us,  2.1 sy,  0.0 ni, 89.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem :  1868660 total,    97900 free,   741768 used,  1028992 buff/cache
KiB Swap:  2097148 total,  2096988 free,      160 used.   846492 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND    
11889 root      20   0  249560  25292   9716 S  7.0  1.4   0:45.74 Xorg       
13840 root      20   0  569308  23720  15028 S  2.6  1.3   0:44.25 gnome-term+
12475 root      20   0 1471528 123476  41808 S  1.7  6.6   2:13.88 gnome-shell
81569 root      20   0  146412   2416   1428 R  1.0  0.1   0:00.15 top        
  735 root      20   0       0      0      0 R  0.3  0.0   0:52.01 xfsaild/dm+
 1064 root      20   0  317740   6500   4980 S  0.3  0.3   1:00.13 vmtoolsd   
12417 root      20   0   37232   2156   1400 S  0.3  0.1   0:09.83 dbus-daemon
12422 root      20   0  129684   3396   2764 S  0.3  0.2   0:01.12 at-spi2-re+
12521 root      20   0  571796  10676   5148 S  0.3  0.6   0:09.17 caribou    
12548 root      20   0  334428   6064   4576 S  0.3  0.3   0:03.07 goa-identi+
    1 root      20   0  192256   7512   2636 S  0.0  0.4   0:35.87 systemd    
    2 root      20   0       0      0      0 S  0.0  0.0   0:00.03 kthreadd   
    3 root      20   0       0      0      0 S  0.0  0.0   0:27.90 ksoftirqd/0
    7 root      rt   0       0      0      0 S  0.0  0.0   0:00.00 migration/0
    8 root      20   0       0      0      0 S  0.0  0.0   0:00.00 rcu_bh     
    9 root      20   0       0      0      0 S  0.0  0.0   0:00.00 rcuob/0    
   10 root      20   0       0      0      0 S  0.0  0.0   0:00.00 rcuob/1  
  1. free:用于显示当前系统内存的使用情况。
[root@localhost test]# free -h
             total        used        free      shared  buff/cache   available
Mem:           1.8G        720M         98M         10M        1.0G        830M
Swap:          2.0G        160K        2.0G
  1. stat:用于查看文件的具体存储时间和时间等信息;
[root@localhost test]# stat /test
 文件:"/test"
 大小:49        	块:0          IO 块:4096   目录
设备:fd00h/64768d	Inode:36453058    硬链接:2
权限:(1777/drwxrwxrwt)  Uid:(    0/    root)   Gid:(    0/    root)
环境:unconfined_u:object_r:default_t:s0
最近访问:2018-12-07 10:27:57.602035597 +0800
最近更改:2018-12-05 21:29:58.978328663 +0800
最近改动:2018-12-05 21:29:58.978328663 +0800
创建时间:-

(欢迎补充)

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转载自blog.csdn.net/qq_43157982/article/details/84816016
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