dsh批量管理linux服务器
一，安装dsh
wget
tar zxvf libdshconfig-0.20.9.tar.gz
cd libdshconfig-0.20.9
./configure
make && make install
wget
tar zxvf dsh-0.25.9.tar.gz
cd dsh-0.25.9
./configure
make && make install
ln -s /usr/local/lib/libdshconfig.so.1 /lib/
[root@localhost ~]# which dsh
/usr/local/bin/dsh
二，用法介绍：
[root@china-channel ~]# 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 详细模式输出
-q –quiet Quiet 安静模式输出
-M –show-machine-names Prepend the host name on output显示被控制主机的hostname
-H –hide-machine-names Do not prepend host name on output 不显示主机名（default）
-i –duplicate-input Duplicate input given to dsh
-b –bufsize Change buffer size used in input duplication
-m –machine [machinename] Execute on machine 主机名
-n –num-topology How to divide the machines
-a –all Execute on all machines 主机列表，默认列表在/root/.dsh/machines.list
-g –group [groupname] Execute on group member 指定主机名组,主机名组在/root/.dsh/group/
-f –file [file] Use the file as list of machines 选择主机列表
-r –remoteshell [shellname] Execute using shell (rsh/ssh) 指定远程工具，默认为rsh
-o –remoteshellopt [option] Option to give to shell
-h –help Give out this message
-w –wait-shell Sequentially execute shell 指定顺序运行，默认是并行
-c –concurrent-shell Execute shell concurrently
-F –forklimit [fork limit] Concurrent with limit on number
-V –version Give out version information
三，创建控制的主机列表
[root@china-channel ~]# cat /root/.dsh/machines.list
218.85.1.2
218.85.1.3
[root@china-channel ~]# cat /root/.dsh/group/umail
218.85.1.2
218.85.1.3
四，配置ssh无密码登陆
[root@china-channel ~]# ssh-keygen -t rsa
回车三次。
在/root/.ssh目录下生成id_rsa，id_rsa.pub
把id_rsa.pub拷贝到被控制机的/root/.ssh/目录下：
[root@mail176 .ssh]#mv id_rsa.pub authorized_keys
[root@mail176 .ssh]#chmod 600 authorized_keys
对于有多个不同控制机的，可以通过cat id_rsa.pub >>authorized_keys 追加的形式
五，应用举例：
[root@china-channel AIMstor]# dsh -M -r ssh -a — free
218.85.1.2: total used free shared buffers cached
218.85.1.2: Mem: 8168272 8138584 29688 0 197176 3516140
218.85.1.2: -/+ buffers/cache: 4425268 3743004
218.85.1.2: Swap: 16386260 1011732 15374528
218.85.1.3: total used free shared buffers cached
218.85.1.3: Mem: 8168272 8103304 64968 0 543324 3085280
218.85.1.3: -/+ buffers/cache: 4474700 3693572
218.85.1.3: Swap: 16386260 1039780 15346480
[root@china-channel AIMstor]# dsh -M -r ssh -a — free|grep /cache
218.85.1.2: -/+ buffers/cache: 4423528 3744744
218.85.1.3: -/+ buffers/cache: 4462684 3705588
[root@china-channel AIMstor]# dsh -M -r ssh -a — df -h
218.85.1.2: Filesystem Size Used Avail Use% Mounted on
218.85.1.2: /dev/sda3 48G 31G 15G 67% /
218.85.1.2: /dev/sda6 792G 377G 375G 51% /bk
218.85.1.2: /dev/sda2 48G 4.7G 41G 11% /opt
218.85.1.2: /dev/sda1 251M 17M 222M 7% /boot
218.85.1.2: /dev/sdb1 2.7T 1008G 1.6T 39% /mail
218.85.1.2: tmpfs 3.9G 0 3.9G 0% /dev/shm
218.85.1.3: Filesystem Size Used Avail Use% Mounted on
218.85.1.3: /dev/sda3 48G 35G 11G 77% /
218.85.1.3: /dev/sda6 792G 215G 537G 29% /bk
218.85.1.3: /dev/sda2 48G 5.7G 40G 13% /opt
218.85.1.3: /dev/sdb1 2.7T 812G 1.8T 32% /mail
218.85.1.3: /dev/sda1 251M 17M 222M 7% /boot
218.85.1.3: tmpfs 3.9G 0 3.9G 0% /dev/shm
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