1. 安装expect

[root@localhost ~]# yum install expect
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* updates: mirrors.aliyun.com
base                                               | 3.6 kB     00:00     
extras                                             | 2.9 kB     00:00     
updates                                            | 2.9 kB     00:00     
Resolving Dependencies
--> Running transaction check
---> Package expect.x86_64 0:5.45-14.el7_1 will be installed
--> Finished Dependency ResolutionDependencies Resolved==========================================================================Package        Arch           Version                 Repository    Size
==========================================================================
Installing:expect         x86_64         5.45-14.el7_1           base         262 kTransaction Summary
==========================================================================
Install  1 PackageTotal download size: 262 k
Installed size: 566 k
Is this ok [y/d/N]: y
Downloading packages:
expect-5.45-14.el7_1.x86_64.rpm                      | 262 kB   00:00     
Running transaction check
Running transaction test
Transaction test succeeded
Running transactionInstalling : expect-5.45-14.el7_1.x86_64                            1/1 Verifying  : expect-5.45-14.el7_1.x86_64                            1/1 Installed:expect.x86_64 0:5.45-14.el7_1                                           Complete!
[root@localhost ~]# 

2. 脚本制作

host.info

#格式： ip地址 用户 端口 密码
192.168.43.242 root 22 root
192.168.43.134 root 22 root
192.168.43.228 root 22 root

脚本内容：

#!/bin/bash
COMMAND=$*
HOST_INFO=host.info
for IP in $(awk '/^[^#]/{print $1}' $HOST_INFO); doUSER=$(awk -v ip=$IP 'ip==$1{print $2}' $HOST_INFO)PORT=$(awk -v ip=$IP 'ip==$1{print $3}' $HOST_INFO)PASS=$(awk -v ip=$IP 'ip==$1{print $4}' $HOST_INFO)expect -c "spawn ssh -p $PORT $USER@$IPexpect {\"(yes/no)\" {send \"yes\r\"; exp_continue}\"password:\" {send \"$PASS\r\"; exp_continue}\"$USER@*\" {send \"$COMMAND\r exit\r\"; exp_continue}}"echo "---------Execute Successful! ----------"
don

3. 赋予权限

chmod +x 8.sh

4. 运行脚本

[root@localhost ~]# ./8.sh df -h
spawn ssh -p 22 root@192.168.43.228
root@192.168.43.228's password: 
Last login: Tue Feb 25 10:32:22 2020 from desktop-0shdb7s
[root@localhost ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   50G  2.1G   48G   5% /
devtmpfs                 898M     0  898M   0% /dev
tmpfs                    910M     0  910M   0% /dev/shm
tmpfs                    910M  9.7M  901M   2% /run
tmpfs                    910M     0  910M   0% /sys/fs/cgroup
/dev/sda1               1014M  146M  869M  15% /boot
/dev/mapper/centos-home   47G   33M   47G   1% /home
tmpfs                    182M     0  182M   0% /run/user/0
[root@localhost ~]#  exit
logout
Connection to 192.168.43.228 closed.
-------------------
[root@localhost ~]# 

5. 直接运行脚本

[root@localhost ~]# bash 8.sh df -h
spawn ssh -p 22 root@192.168.43.228
root@192.168.43.228's password: 
Last login: Tue Feb 25 10:36:06 2020 from 192.168.43.134
[root@localhost ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   50G  2.1G   48G   5% /
devtmpfs                 898M     0  898M   0% /dev
tmpfs                    910M     0  910M   0% /dev/shm
tmpfs                    910M  9.7M  901M   2% /run
tmpfs                    910M     0  910M   0% /sys/fs/cgroup
/dev/sda1               1014M  146M  869M  15% /boot
/dev/mapper/centos-home   47G   33M   47G   1% /home
tmpfs                    182M     0  182M   0% /run/user/0
[root@localhost ~]#  exit
logout
Connection to 192.168.43.228 closed.
df -hexit
-------------------
[root@localhost ~]# 

6. vmstat测试

[root@localhost ~]# bash 8.sh vmstat
spawn ssh -p 22 root@192.168.43.228
root@192.168.43.228's password: 
Last login: Tue Feb 25 10:39:57 2020 from 192.168.43.134
[root@localhost ~]# vmstat
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st1  0      0 1511112   2108 196804    0    0     4     1   15   20  0  0 100  0  0
[root@localhost ~]#  exit
logout
Connection to 192.168.43.228 closed.
vmstatexit
-------------------
[root@localhost ~]#