expect example

gistfile1.sh

#!/bin/bash
Ip='192.168.1.6'            # 循环就行
RemoteUser='user'           # 普通用户
RemotePasswd='userpasswd'   # 普通用户的密码
RemoteRootPasswd='rootpasswd'
/usr/bin/expect -c "
set timeout -1
spawn ssh -t -p $Port -o StrictHostKeyChecking=no $RemoteUser@$Ip
expect {
	password {
		send_user RemotePasswd
		send ${RemotePasswd}\r;
		expect {
			\"does not exist\" {
				send_user \"root user does not exist\n\"
				exit 10
			}
			password {
				send_user \"user passwd error\n\"
				exit 5
			}
			Last {
				send \"su - batch\n\"
				expect {
					Password {
						send_user RemoteRootPasswd
						send ${RemoteRootPasswd}\r;
						expect {
							\"]#\" {
								send \"sh /tmp/update.sh update\n \"
								expect {
									\"]#\" {
										send_user ${Ip}_Update_Done\n
									}
									eof
								}
							}
						}
					}
				}
			}
		}
	}
	\"No route to host\" {
		send_user \"host not found\n\"
		exit 4
	}
	\"Invalid argument\" {
		send_user \"incorrect parameter\n\"
		exit 8
	}
	\"Connection refused\" {
		send_user \"invalid port parameters\n\"
		exit 9
	}
	\"does not exist\" {
		send_user \"root user does not exist\"
		exit 10
	}
	timeout {
		send_user \"connection timeout \n\"
		exit 3
	}
	eof
}
"
state=`echo $?`