使用expect实现自动登录SSH服务器,并在远端执行命令

脚本内容如下：

#!/usr/bin/expect -f

if {$argc<2} {
puts stderr “Usage: $argv0 host user passwaord timeout”
exit 1
}
set HOST [lindex $argv 0]
set USER [lindex $argv 1]
set PASSWD [lindex $argv 2]
set TIMEOUT [lindex $argv 3]

set timeout $TIMEOUT

spawn ssh -l $USER $HOST

# 判断是否是第一次登录
expect_before “no)?” {
send “yes\r” }
sleep 1

# 输入密码
expect “password:”
send “$PASSWD\r”
#如果想直接进入交互模式,可以直接用下面这句
#interact

#自动在远端服务器执行命令

#判断提示符
sleep 2
expect “*#”
send “mkdir /blog.zhangjianfeng.com/tmp/abcd -p\r”
send “ls -l\r”
expect “*#”
exit

## END ##

如果需要调用多台主机，可以写一个shell脚本来调用上面的脚本expect.sh
#cat callexpect.sh
#!/bin/bash
TIMEOUT=2
for i in `cat list`
do
HOST=${i%% *}
USER=`echo $i | awk -F [\ :] ‘{print $2}’`
PASS=${i##*:}
./expect.sh $HOST $USER $PASS $TIMEOUT
done
#list文件格式是 ip:user:passwd