10. hkg03s16-in-f8.1e100.net 0.0% 41 4.8 4.9 4.7 5.0 0.1
2.nl命令，给所查看的文本加上行号，如下
cat a.log
aa
nl a.log
1 aa
3.shuf命令，随机从一个文件或者一个文件夹中选取行或者文件
[root@localhost mwq]# ls | shuf -n1
a.log
[root@localhost mwq]# ls | shuf -n1
a.log
[root@localhost mwq]# ls | shuf -n1
a.log
[root@localhost mwq]# ls | shuf -n1
20140512.sql
[root@localhost mwq]# ls | shuf -n1
20140512.sql
[root@localhost mwq]# ls | shuf -n1
a.log
[root@localhost mwq]# vim a.log
[root@localhost mwq]# cat a.log | shuf -n1
aa
[root@localhost mwq]# cat a.log | shuf -n1
dd
[root@localhost mwq]# cat a.log | shuf -n1
aa
[root@localhost mwq]# cat a.log | shuf -n1
ff
当然你也可以改变参数如cat a.log | shuf -n2获取两行内容。
4.last命令，查看上次登录或者登出的用户
root pts/4 xxxxxxxxxxx Sun May 18 19:12 still logged in
root pts/4 xxxxxxxxxxx Fri May 16 09:39 - 15:17 (05:38)
root pts/4 xxxxxxxxxxx Wed May 14 17:13 - 18:01 (00:48)
root pts/4 xxxxxxxxxxx Mon May 12 10:50 - 13:38 (02:47)
root pts/4 xxxxxxxxxxx Mon May 12 10:48 - 10:50 (00:02)
root pts/1 xxxxxxxxxxx Fri May 9 11:58 still logged in
5.pstree以树的结构显示当前的进程节点
init─┬─abrt-dump-oops
├─abrtd
├─acpid
├─atd
├─auditd───{auditd}
├─avahi-daemon───avahi-daemon
├─console-kit-dae───63*[{console-kit-da}]
├─crond
├─dbus-daemon───{dbus-daemon}
├─hald───hald-runner─┬─hald-addon-acpi
│ └─hald-addon-inpu
├─irqbalance
├─java───330*[{java}]
├─master───qmgr
├─6*[mingetty]
├─mysqld_safe───mysqld───11*[{mysqld}]
├─rhsmcertd───rhsmcertd
├─rsyslogd───3*[{rsyslogd}]
