命令:
w
[root@centos1 usr]# w
14:05:11 up 3:55, 3 users, load average: 0.00, 0.05, 0.23
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/0 10.111.22.247 10:13 0.00s 8.67s 0.00s w
root pts/1 10.121.21.63 13:14 4:12 49.85s 26.66s -bash
root pts/2 10.121.21.63 13:40 15:04 0.30s 0.30s -bash who
[root@centos1 usr]# who
root pts/0 2015-02-03 10:13 (10.111.22.247)
root pts/1 2015-02-03 13:14 (10.121.21.63)
root pts/2 2015-02-03 13:40 (10.121.21.63)
