运维人员往往会头疼，要在10多台服务器上去执行同样的操作。
在linux下有一款这样的工具（pssh），解决了这个问题。
这款工具的几个主要功能：
pssh 在多个主机上并行地运行命令。
pscp 把文件并行地复制到多个主机上。
prsync 通过 rsync 协议把文件高效地并行复制到多个主机上。
pslurp 把文件并行地从多个远程主机复制到中心主机上。
pnuke 并行地在多个远程主机上杀死进程。
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1：安装
wget http://parallel-ssh.googlecode.com/files/pssh-2.2.2.tar.gz
tar zxvf pssh-2.2.2.tar.gz
cd pssh-2.2.2
python setup.py install
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2.配置密钥，免密码访问管理机器
在使用之前需要配置密钥访问，如下:
#ssh-keygen 【回车】
#复制公钥到远端服务器
#ssh-copy-id -i .ssh/id_rsa.pub [email protected]
ps.如果端口不是默认22 ，需要使用：ssh-copy-id -i .ssh/id_rsa.pub ”-p 4567 [email protected]”
编辑 服务器列表文件 servers.txt
# vim /home/server.txt
[email protected]:22031
hosts file (each line "[user@]host[:port]")
3：运行第一条命令，查看启动时间
]# pssh -h servers.txt -l root -p uptime
173.16.0.102: 13:14:57 up 1 day, 2:00, 1 user, load average: 0.00, 0.00, 0.00
173.16.0.100: 13:23:34 up 21:40, 1 user, load average: 0.00, 0.00, 0.00
[1] 13:13:52 [success] 173.16.0.102
[2] 13:13:52 [success] 173.16.0.100
4：删除文件
我需要删除以前yum.repo 文件
pssh -h servers.txt -p "rm -r /etc/yum.repos.d/*.repo"
5：传输单个文件
pscp -h servers.txt /etc/yum.repos.d/ftp.repo /etc/yum.repos.d/
6：运行yum update
]# pssh -h servers.txt -l root -p "yum update"
173.16.0.100: loaded plugins: fastestmirror
173.16.0.102: loaded plugins: fastestmirror
173.16.0.100: loading mirror speeds from cached hostfile
173.16.0.102: loading mirror speeds from cached hostfile
173.16.0.100: setting up update process
173.16.0.102: setting up update process
173.16.0.100: no packages marked for update
173.16.0.102: no packages marked for update
[1] 13:38:13 [success] 173.16.0.100
[2] 13:38:13 [success] 173.16.0.102
7：让机器加载ext4
]# pssh -h servers.txt -l root -p "modprobe ext4"
[1] 13:49:42 [success] 173.16.0.100
[2] 13:49:42 [success] 173.16.0.102
8：安装e4fsprogs, 支持ext4分区
[root@gluster02b ~]# pssh -h servers.txt -l root -p "yum -y install e4fsprogs"
173.16.0.100: complete!
[1] 13:53:11 [success] 173.16.0.100
173.16.0.102:
installed:
e4fsprogs.x86_64 0:1.41.12-2.el5
173.16.0.102: complete!
[2] 13:53:11 [success] 173.16.0.102
9：创建一个目录
# pssh -h servers.txt -l root -p "mkdir /data01"
[1] 09:53:27 [success] 173.16.0.100
[2] 09:53:27 [success] 173.16.0.102
# pscp -h servers.txt /etc/fstab /etc/
[1] 09:53:51 [success] 173.16.0.102
[2] 09:53:51 [success] 173.16.0.100
10：复制文件夹到远程
# pscp -h servers.txt -r /root/tools/ /root/
[1] 10:23:27 [success] 173.16.0.100
[2] 10:23:28 [success] 173.16.0.102
11：关闭selinux
# pssh -h servers.txt -l root -p "sed -i '/selinux=enforcing/s/selinux=enforcing/selinux=disabled/' /etc/sysconfig/selinux"
[1] 11:47:15 [success] 173.16.0.100
[2] 11:47:15 [success] 173.16.0.102
# pssh -h servers.txt -l root -p init 6
[1] 11:47:28 [success] 173.16.0.102
[2] 11:47:28 [success] 173.16.0.100
# pssh -h servers.txt -l root -p sestatus
[1] 11:49:37 [failure] 173.16.0.100 exited with error code 255
[2] 11:49:37 [failure] 173.16.0.102 exited with error code 255
173.16.0.100: selinux status: disabled
[1] 11:52:32 [success] 173.16.0.100
173.16.0.102: selinux status: disabled
[2] 11:52:32 [success] 173.16.0.102
http://sheriy.com/?p=748
http://www.theether.org/pssh/docs/0.2.3/pssh-howto.html