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能显示完整的 IP 地址吗？

tag-icon • tag-icon 14.04 command-line
能显示完整的 IP 地址吗？

当我在 Ubuntu Server 14.04 上使用该w命令时，我得到如下输出：

 18:44:24 up 4 days,  3:10,  1 user,  load average: 0.00, 0.00, 0.00
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT
kd       pts/0    2001:db8:1334:2c 12:54    0.00s  0.06s  0.00s w

如您所见，IP 地址已被截断。有什么方法可以w显示完整的 IP 地址而不进行截断？

答案1

根据man页面内容w.procps：

trusty (1) w.procps.1.gz
Provided by: procps_3.3.9-1ubuntu2_i386 bug

NAME
       w - Show who is logged on and what they are doing.

...  

ENVIRONMENT
   PROCPS_USERLEN
          Override  the default width of the username column.  Defaults to
          8.

   PROCPS_FROMLEN
          Override the default width of the from column.  Defaults to 16.

例如，

w3@aardvark:~(0)$ w
 13:30:24 up 6 days, 20:32,  3 users,  load average: 4.08, 3.43, 3.12
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT
w3       tty1                      19Nov16 25:51m  0.40s  0.38s -bash
w3       tty7     :0               19Nov16  6days 11:37m  2.41s /sbin/upstart --user
w3       pts/16   192.168.100.254  13:20    9:34   0.25s  0.25s -bash
w3@aardvark:~(0)$ env PROCPS_FROMLEN=48 w
 13:30:36 up 6 days, 20:32,  3 users,  load average: 3.68, 3.36, 3.10
USER     TTY      FROM                                             LOGIN@   IDLE   JCPU   PCPU WHAT
w3       tty1                                                      19Nov16 25:51m  0.40s  0.38s -bash
w3       tty7     :0                                               19Nov16  6days 11:37m  2.41s /sbin/upstart --user
w3       pts/16   192.168.100.254                                  13:20    9:46   0.25s  0.25s -bash

答案2

我相信您的解决方案是使用last -w不会截断主机名的。

要过滤结果以查看当前谁登录，只需简单grep操作即可。

last -w | grep "logged in"

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