一，安装dsh

wget http://www.netfort.gr.jp/~dancer/software/downloads/libdshconfig-0.20.9.tar.gz
tar xvf libdshconfig-0.20.9.tar.gz
cd libdshconfig-0.20.9
./configure --prefix=/usr/
make && make install
wget http://www.netfort.gr.jp/~dancer/software/downloads/dsh-0.25.9.tar.gz
tar xvf dsh-0.25.9.tar.gz
cd dsh-0.25.9
./configure --prefix=/usr/
make && make install
ldconfig
[root@heit]# dsh --help
Distributed Shell / Dancer's shell version 0.25.9
Copyright 2001-2005 Junichi Uekawa,
distributed under the terms and conditions of GPL version 2
-v --verbose                   Verbose output
-q --quiet                     Quiet
-M --show-machine-names        Prepend the host name on output
-H --hide-machine-names        Do not prepend host name on output
-i --duplicate-input           Duplicate input given to dsh
-b --bufsize                   Change buffer size used in input duplication
-m --machine [machinename]     Execute on machine
-n --num-topology              How to divide the machines
-a --all                       Execute on all machines
-g --group [groupname]         Execute on group member
-f --file [file]               Use the file as list of machines
-r --remoteshell [shellname]   Execute using shell (rsh/ssh)
-o --remoteshellopt [option]   Option to give to shell
-h --help                      Give out this message
-w --wait-shell                Sequentially execute shell
-c --concurrent-shell          Execute shell concurrently
-F --forklimit [fork limit]    Concurrent with limit on number
-V --version                   Give out version information
这说明安装成功
ssh-keygen -t rsa
一路回车会在/root/.ssh/目录下生成公钥（id_rsa.pub）和私钥（id_rsa）。
将id_rsa.pub复制到被控制端/root/.ssh/目录下
mv id_rsa.pub authorized_keys
chmod authorized_keys 600
在控制端
mkdir /root/.dsh/
mkdir /root/.dsh/group/
touch /root/.dsh/machines.list
touch /root/.dsh/group/g1
cat //root/.dsh/machines.list
192.168.220.12
cat /root/.dsh/group/g1
192.168.220.12
dsh -r ssh -a touch /root/a
dsh -r ssh -g g1 touch /root/a

如果远端机器修改了端口号

dsh -M -a -r ssh -o -p9830 touch /tmp/li