详细资料参考以上链接，最下面是本人的一些实际操作，仅供参考：

已经将个人示例的系统版本和YUM库的配置列出来了

1、新建screen会话：直接输入screen命令或者screen -S [会话名称]

2、退出会话：按下组合键Ctrl+a并松开，此时screen窗口等待命令，然后按下d并松开，退出screen窗口。

3、查看当前系统所有screen会话：screen -ls

4、进入某个screen会话：screen -r [会话的PID]

5、在进入某个screen会话后，杀死screen会话：按下组合键Ctrl+a并松开，此时screen窗口等待命令，然后按下大写的K(即组合键：Shift+k)并松开，(系统提示是否要杀死)按下y确认杀死screen会话。

总结：当系统中只有一个screen会话时，输入：screen -r 即可进入这个会话，

当系统中有多个screen会话时，此时输入同样的命令，系统会列出当前所有screen回话，相当于命令：screen -ls

更多的关于screen的参数，可以参考手册：man screen

同时还要多多实际操作，会得到更多的切身体会，希望本文能够对感兴趣的读者有所帮助，欢迎转载，很愿意分享分享，共同成长，谢谢！

[root@localhost ~]# cat /etc/issue

CentOS release 5.4 (Final)

Kernel \r on an \m

[root@localhost ~]# cat /etc/yum.repos.d/CentOS-Base.repo

# CentOS-Base.repo

#

# The mirror system uses the connecting IP address of the client and the

# update status of each mirror to pick mirrors that are updated to and

# geographically close to the client.  You should use this for CentOS updates

# unless you are manually picking other mirrors.

#

# If the mirrorlist= does not work for you, as a fall back you can try the

# remarked out baseurl= line instead.

#

#

[base]

name=CentOS-$releasever - Base

baseurl=http://mirrors.163.com/centos/5.5/os/i386/

enabled=1

gpgcheck=0

#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

[root@localhost ~]# screen

-bash: screen: command not found

[root@localhost ~]# yum -y install screen

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

* addons: data.nicehosting.co.kr

* base: mirror01.idc.hinet.net

* extras: data.nicehosting.co.kr

* updates: data.nicehosting.co.kr

Setting up Install Process

Resolving Dependencies

--> Running transaction check

---> Package screen.x86_64 0:4.0.3-1.el5_4.1 set to be updated

--> Finished Dependency Resolution

Dependencies Resolved

==============================================================================================================================================================

Package                             Arch                                Version                                      Repository                         Size

==============================================================================================================================================================

Installing:

screen                              x86_64                              4.0.3-1.el5_4.1                              base                              571 k

Transaction Summary

==============================================================================================================================================================

Install      1 Package(s)

Update       0 Package(s)

Remove       0 Package(s)

Total download size: 571 k

Downloading Packages:

screen-4.0.3-1.el5_4.1.x86_64.rpm                                                                                                      | 571 kB     00:01

warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID e8562897

base/gpgkey                                                                                                                            | 1.5 kB     00:00

Importing GPG key 0xE8562897 "CentOS-5 Key (CentOS 5 Official Signing Key) centos-5-key@centos.org>" from /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

Running rpm_check_debug

Running Transaction Test

Finished Transaction Test

Transaction Test Succeeded

Running Transaction

Installing     : screen                                                                                                                                 1/1

Installed:

screen.x86_64 0:4.0.3-1.el5_4.1

Complete!

[root@localhost ~]# screen

[root@localhost ~]# dateSun Apr  3 21:02:22 EDT 2011

[root@localhost ~]#

[detached]

[root@localhost ~]# screen -S 20110403

[root@localhost ~]# dateSun Apr  3 21:05:45 EDT 2011

[root@localhost ~]#

[detached]

[root@localhost ~]# screen -ls

There are screens on:

31550.pts-2.localhost   (Detached)

31577.20110403  (Detached)

2 Sockets in /var/run/screen/S-root.

[root@localhost ~]# screen -r 31577

[root@localhost ~]# date

Sun Apr  3 21:05:45 EDT 2011

[root@localhost ~]#

[detached]

[root@localhost ~]# screen -r 31550

[root@localhost ~]# date

Sun Apr  3 21:02:22 EDT 2011

[root@localhost ~]#

[screen is terminating]

[root@localhost ~]# man screen

SCREEN(1)                                                            SCREEN(1)

NAME

screen - screen manager with VT100/ANSI terminal emulation

SYNOPSIS

screen [ -options ] [ cmd [ args ] ]

screen -r [[pid.]tty[.host]]

screen -r sessionowner/[[pid.]tty[.host]]