刚刚才注意,默认情况下rhel6 是不安装screen命令的:
[root@rhel63single yum.repos.d]# yum install screen Loaded plugins: product-id, refresh-packagekit, security, subscription-manager Updating certificate-based repositories. Unable to read consumer identity rhel-source | 4.0 kB 00:00 ... rhel-source-beta | 4.0 kB 00:00 ... Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package screen.x86_64 0:4.0.3-16.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================================ Package Arch Version Repository Size ============================================================================================================================================================ Installing: screen x86_64 4.0.3-16.el6 rhel-source 494 k Transaction Summary ============================================================================================================================================================ Install 1 Package(s) Total download size: 494 k Installed size: 795 k Is this ok [y/N]: y Downloading Packages: Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : screen-4.0.3-16.el6.x86_64 1/1 Installed products updated. Verifying : screen-4.0.3-16.el6.x86_64 1/1 Installed: screen.x86_64 0:4.0.3-16.el6 Complete! [root@rhel63single yum.repos.d]# which screen /usr/bin/screen [root@rhel63single yum.repos.d]#
一、screen 的建立
[root@rhel63single ~]# screen -ls No Sockets found in /var/run/screen/S-root. [root@rhel63single ~]# [root@rhel63single ~]# [root@rhel63single ~]# screen -dmS lei1 [root@rhel63single ~]# screen -ls There is a screen on: 5786.lei1 (Detached) 1 Socket in /var/run/screen/S-root. [root@rhel63single ~]# 其中:5786是linux的ospid。lei1是会话的名称。
二、screen 的进入
[root@rhel63single ~]# screen -r lei1
三、暂时退出某个screen 的session :先按ctrl ,再按小写的a,再按小写的d
[root@rhel63single ~]# [detached] [root@rhel63single ~]#
四、若是本来就在该session中,再使用screen -r lei1命令时的提示:
[root@rhel63single ~]# screen -r lei 或者用screen -r 5786 There is a screen on: 5786.lei1 (Attached) There is no screen to be resumed matching lei. [root@rhel63single ~]#
五、状态解释:
[root@rhel63single ~]# screen -dmS lei2 [root@rhel63single ~]# [root@rhel63single ~]# [root@rhel63single ~]# [root@rhel63single ~]# screen -ls There are screens on: 5850.lei2 (Detached)---->挂起状态,无终端在连接会话 5786.lei1 (Attached)---->有终端在连接会话。 2 Sockets in /var/run/screen/S-root. [root@rhel63single ~]#
六、永久退出screen中的本session
[root@rhel63single ~]# exit exit [screen is terminating] [root@rhel63single ~]# screen -ls There is a screen on: 5850.lei2 (Detached) 1 Socket in /var/run/screen/S-root.
七、检查screen中的其他session的来源ip:
[root@rhel63single ~]# who -a system boot 2015-03-19 12:36 run-level 5 2015-03-19 12:36 LOGIN tty2 2015-03-19 12:37 1979 id=2 LOGIN tty4 2015-03-19 12:37 1983 id=4 LOGIN tty3 2015-03-19 12:37 1981 id=3 LOGIN tty5 2015-03-19 12:37 1985 id=5 LOGIN tty6 2015-03-19 12:37 1987 id=6 root + pts/0 2015-03-19 19:05 00:17 5306 (192.168.80.1) pts/1 2015-03-19 22:29 5787 id=/1 term=0 exit=0 pts/2 2015-03-19 22:33 5810 id=ts/2 term=0 exit=0 root + pts/3 2015-03-19 22:33 . 5830 (192.168.80.1) root + pts/4 2015-03-19 22:42 00:11 5851 (192.168.80.1:S.0)---->注意此处 [root@rhel63single ~]# screen -ls There is a screen on: 5850.lei2 (Attached) 1 Socket in /var/run/screen/S-root. [root@rhel63single ~]# ps -ef | grep 5851---->注意此处 root 5851 5850 0 22:33 pts/4 00:00:00 /bin/bash root 5974 5830 0 22:56 pts/3 00:00:00 grep 5851 [root@rhel63single ~]# ps -ef | grep 5850---->注意此处 root 5850 1 0 22:33 ? 00:00:00 SCREEN -dmS lei2 ---->注意此处 root 5851 5850 0 22:33 pts/4 00:00:00 /bin/bash ---->注意此处 root 5883 5810 0 22:42 pts/2 00:00:00 screen -r 5850 [root@rhel63single ~]#
八、检查当前的提示符是否处于screen的session中:
按ctrl,再按a,再按t 此时,在左下角会显示:“22:45:06 Mar 19 rhel63single 0.00 0.00 0.00” 字样 格式为:当前时间,日期,主机名,负载情况
九、杀掉screen中的其他session
[root@rhel63single ~]# kill -9 5850 [root@rhel63single ~]# screen -ls There is a screen on: 5850.lei2 (Dead ???) Remove dead screens with 'screen -wipe'. 1 Socket in /var/run/screen/S-root. [root@rhel63single ~]# screen -wipe There is a screen on: 5850.lei2 (Removed) 1 socket wiped out. No Sockets found in /var/run/screen/S-root. [root@rhel63single ~]# screen -ls No Sockets found in /var/run/screen/S-root. [root@rhel63single ~]#
然后,被杀掉的session 有提示:
[root@rhel63single ~]# Suddenly the Dungeon collapses!! - You die... [root@rhel63single ~]#