Linux and linux

Linux and linux

Simple mode:

#!/usr/bin/expect -f   set timeout 5   spawn ssh root@192.168.0.1expect "*assword*"   send "root\r"   expect "#"   send "ifconfig \r"   expect eof

Explanation:

Send: used to send a string to the process: receive a string from the process, for example, receive CT "* assword *"
Spawn: Start a new process interact: allow user interaction

How to Use variables:

#!/usr/bin/expect -fset port 22set user rootset host 192.168.0.12set password rootset timeout -1spawn ssh -D $port $user@$host "ifconfig"expect {  "*yes/no" { send "yes\r"; exp_continue}  "*assword:" { send "$password\r" }  }  expect "*#*"  send "ifconfig > /home/cfg \r"send "exit\r"}

Explanation:

Keep CT {"* yes/no" {send "yes \ r"; exp_continue} "* assword:" {send "$ password \ r "}}
Select the mode. exp_continue indicates that the operation continues.

Get the variable by reading the configuration file:
Configuration File

192.168.0.1 root192.168.0.2 root

Automated login script

#!/usr/bin/expect -fset f [open ./ip r]  while { [gets $f line ]>=0 } {       set ip [lindex $line 0]     set pwd [lindex $line 1]spawn ssh $ipexpect  "*password:" { send "$pwd\r" }expect "#"send "ifconfig \r"send "exit\r"interact}

Explanation:

Multiple servers can be executed cyclically. This is a very useful method!

Automatic Remote file copy:

#!/usr/bin/expect -fset port 22set user rootset host 192.168.28.30set password rootset timeout -1spawn scp $host:/home/cfg ./expect {"*yes/no" { send "yes\r"; exp_continue}"*assword:" { send "$password\r" }}expect eof

Explanation:

Same principle as ssh

Run the command remotely and write the file to the local server through scp:

#!/usr/bin/expect -fset port 22set user rootset host 192.168.28.30set password rootset timeout -1spawn ssh -D $port $user@$host "ifconfig"expect {"*yes/no" { send "yes\r"; exp_continue}"*assword:" { send "$password\r" }}expect "*#*"send "ifconfig > /home/cfg \r"send "exit\r"interactspawn scp $host:/home/cfg ./expect {"*yes/no" { send "yes\r"; exp_continue}"*assword:" { send "$password\r" }}expect eof

Explanation:

Automated O & M, remote interaction from server A ssh to server B, and then execute commands on server B.

Http://www.cnblogs.com/Javame/p/4272440.html