Linux系统root用户可强制踢制其它登录用户
# 首先可用w命令查看登录用户信息，显示信息如下：
20:51:34 up 70 days, 4:22, 4 users, load average: 0.56, 0.18, 0.10
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
dfjsb tty2 - 08May10 70days 51.37s 0.53s -bash
dfjsb tty3 - 08May10 70days 2:42 0.21s -bash
dfjsb tty1 - 08May10 70days 6:53m 0.92s -bash
dfjsb pts/0 125.69.149.152 20:46 0.00s 0.35s 0.01s sshd: dfjsb [priv]
# 强制踢人命令格式：pkill -kill -t tty
# tty 所踢用户的TTY
# 如上踢出tty2上的用户的命令为： pkill -kill -t tty2
# 踢除当前所有登录，只保留当前使用的tty/pts
Me="`tty|sed 's#/dev/##g'`";w|awk '{if($2~"^pts/|^tty")print $2}'|grep -v "$Me"|xargs -I {} pkill -kill -t {};w