linux expect implements logging in to a remote host and executing sample command code

This paper mainly introduces the linux expect implementation of login remote host and execution of commands related content, sharing for your reference and learning, the following is 1 to see the detailed introduction:

Sample code:

#!/bin/bash 
export cmd=$1
expect << 'END'
set cmd "$env(cmd)"
spawn ssh root@192.168.56.1 $cmd
expect {
 "(yes/no)?" {send "yes\r";exp_continue}
 "password:" {send "root\r";exp_continue}
 eof
}
END

explain

export defines a variable and gets $1 expect < < 'END' starts the expect script and ends END set cmd "$env(cmd)" gets the system variable spwan starts 1 process expect {} specific reply message

conclusion