利用expect实现自动化操作

管理机上需要安装expect包
yum -y install expect

1.定义主机ip

[root@localhost ~]# cat ip.txt
192.168.1.12
192.168.1.13

2.定义脚本内容

[root@localhost ~]# cat script.sh
vmstat

3、shell嵌套expect脚本

[root@localhost ~]# cat command.sh
#!/bin/bash

passwd='12345678'
sc=$(cat script.sh)

cat ip.txt | while read line
do

/usr/bin/expect <<EOF
set timeout 30
spawn ssh root@$line
expect {
"yes/no" { send "yes\r";exp_continue }
"password:" { send "$passwd\r" }
}
expect "]# "
send "$sc\r"
send "exit\r"
expect eof
EOF

#首先定义密码为passwd变量，把发送的命令定义为sc变量，然后用循环读ip地址定义为line变量。
done
exit 0