screen命令简介
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一、screen常用功能
(1)会话恢复--最常用--使用运维工具网络断开后也可以恢复会话
(2)会话共享--我在做操作,其他人也可以看见
(3)多窗口
二、screen有什么用处?
假如我们正在运行一个程序,可能要跑几个小时,但是中途断网了,
在连接上去看不到程序的运行状态,这时就可以用screen来创建会话了。
三、screen基础命令
[[email protected] ~]# screen -ls 列出哪些程序在运行screen
[[email protected] ~]# screen -S apache 启动screen,给它加一个名字
[[email protected] ~]# screen -x apache -x参数可以进入未断开的会话
四、安装screen
(1)[[email protected] ~]# rpm -qa | grep screen 查询本机是否安装screen
screen-4.0.3-18.el6.x86_64
(2)[[email protected] ~]# yum -y install screen 安装screen
(3)创建一个会话:
[[email protected] ~]# screen -S apache
(4)查看创建的会话:
[[email protected] ~]# screen -ls
There is a screen on:
5410.apache (Attached)
1 Socket in /var/run/screen/S-root.
[[email protected] ~]#
(5)测试 执行一个ping任务,然后断开
[[email protected] ~]# ping baidu.com
PING baidu.com (123.125.114.144) 56(84) bytes of data.
64 bytes from 123.125.114.144: icmp_seq=1 ttl=51 time=50.3 ms
64 bytes from 123.125.114.144: icmp_seq=2 ttl=51 time=50.1 ms
64 bytes from 123.125.114.144: icmp_seq=3 ttl=51 time=50.1 ms
64 bytes from 123.125.114.144: icmp_seq=4 ttl=51 time=50.1 ms
64 bytes from 123.125.114.144: icmp_seq=5 ttl=51 time=50.2 ms
64 bytes from 123.125.114.144: icmp_seq=6 ttl=51 time=50.2 ms
(6)恢复会话
[[email protected] ~]# screen -ls 查看会话,名字是apache
There is a screen on:
5410.apache (Detached)
1 Socket in /var/run/screen/S-root.
[[email protected] ~]# screen -r apache 用-r参数恢复会话
64 bytes from 123.125.114.144: icmp_seq=77 ttl=51 time=50.1 ms
64 bytes from 123.125.114.144: icmp_seq=78 ttl=51 time=50.4 ms
64 bytes from 123.125.114.144: icmp_seq=79 ttl=51 time=50.4 ms
64 bytes from 123.125.114.144: icmp_seq=80 ttl=51 time=51.3 ms
64 bytes from 123.125.114.144: icmp_seq=81 ttl=51 time=53.4 ms
64 bytes from 123.125.114.144: icmp_seq=82 ttl=51 time=49.7 ms
64 bytes from 123.125.114.144: icmp_seq=84 ttl=51 time=50.2 ms
64 bytes from 123.125.114.144: icmp_seq=85 ttl=51 time=50.2 ms
64 bytes from 123.125.114.144: icmp_seq=86 ttl=51 time=50.2 ms
64 bytes from 123.125.114.144: icmp_seq=87 ttl=51 time=51.6 ms
64 bytes from 123.125.114.144: icmp_seq=88 ttl=51 time=52.2 ms
(7)[[email protected] ~]# screen -x apache -x参数可以进入未断开的会话
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