1、先决条件：

安装pssh工具的主机针对远程主机需要配置免秘钥认证：

ssh-keygen -t rsa

ssh-copy-id [remotehost]

2、下载pssh工具安装介质：

https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/pdsh/pdsh-2.29.tar.bz2

3、安装pdsh：

tar -jxvf pdsh-2.29.tar.bz2

cd pdsh-2.29

./configure --with-ssh --with-rsh --with-mrsh --with-mqshell \

--with-dshgroups --with-machines=/etc/pdsh/machines

make && make install

安装成功后OS会多出pdsh和pdcp两个命令：

3、pdsh工具使用详解：

查看帮助：

pdsh --help

pdsh: invalid option -- '-'

Usage: pdsh [-options] command ...

-S                return largest of remote command return values

-h                output usage menu and quit

-V                output version information and quit

-q                list the option settings and quit

-b                disable ^C status feature (batch mode)

-d                enable extra debug information from ^C status

-l user           execute remote commands as user

-t seconds        set connect timeout (default is 10 sec)

-u seconds        set command timeout (no default)

-f n              use fanout of n nodes

-w host,host,...  set target node list on command line

-x host,host,...  set node exclusion list on command line

-R name           set rcmd module to name

-M name,...       select one or more misc modules to initialize first

-N                disable hostname: labels on output lines

-L                list info on all loaded modules and exit

-g groupname      target hosts in dsh group "groupname"

-X groupname      exclude hosts in dsh group "groupname"

-a                target all nodes

available rcmd modules: ssh,rsh,exec (default: rsh)

1）pdsh使用案例：

pdsh -w ssh:192.168.0.18[1-4] "uname -n"

pdsh -w ssh:192.168.0.18[1-4] -x db01 "uptime"

pdsh -w ssh:192.168.0.18[1-4],/[234]$/ "uptime"

$ cat /etc/pdsh/machines

db01

db02

db03

db04

$ pdsh -R ssh -a "uptime"

cat /etc/dsh/group/bdgroup

db01

db02

db03

db04

pdsh -R ssh -g bdgroup "uptime"

pdsh -R ssh -a -X bdgroup uptime

pdsh -R ssh -a "sudo touch /mnt/aaa"

pdsh交互式命令窗口：

$ pdsh -R ssh -w db02

pdsh> ls -l

db02: total 139040

db02: drwxr-xr-x 8 hadoop hadoop       233 Jul 26  2014 jdk1.7.0_67

db02: -rwxrwxr-x 1 hadoop hadoop 142376665 Oct  2 07:51 jdk-7u67-linux-x64.tar.gz

pdsh> pwd

db02: /home/hadoop

pdsh> rm -rf jdk1.7.0_67

pdsh> ls -l

db02: total 139040

db02: -rwxrwxr-x 1 hadoop hadoop 142376665 Oct  2 07:51 jdk-7u67-linux-x64.tar.gz

pdsh> sudo tar -zxf jdk-7u67-linux-x64.tar.gz -C /mnt/

pdsh> ls -l /mnt

db02: total 9424

db02: drwxr-xr-x  8     10    143     233 Jul 26  2014 jdk1.7.0_67

pdsh> quit

2）pdcp使用案例：

使用pdcp命令要求本地主机和远程主机必须安装pdsh工具，这也是唯一一点麻烦的地方。

pdcp -R ssh -w db02 /mnt/pssh-2.3.1.tar.gz /home/hadoop/