"Distribution system" of shell programming

First, expect explanation

Expect allows us to automatically log on to remote machines, and can implement automatic remote execution of commands. Of course, if you use key authentication without a password, you can also implement automatic logon and automatic remote command execution. But when we can't use key verification, we don't have a choice. So, just know the other machine's account number and password can be implemented through the expect script login and remote command.

1, installation expect

[email protected] ~]# Yum install-y expect

2. Automatic remote Login Script

Automatic Telnet, and execute commands, here are a few scripts:

First: Do not exit the script after landing;

The second one: after landing, execute the command and then exit the script;

Third: Pass the parameter log in, and then execute the command exit script;

Fourth: Automatic synchronization of file scripts;

Fifth: Specify host and files to synchronize

1) scripts that do not exit after logging in

[Email protected] ~]# cd/usr/local/sbin/

[Email protected] sbin]# mkdir expect

[Email protected] sbin]# CD expect/

[Email protected] expect]# vim 1.expect

#! /usr/bin/expect Set Host "192.168.0.10" Set passwd "123456" Spawn ssh [email protected] $host Expect { "Yes/no" {send "yes\r"; Exp_continue} "Assword:" {send "$passwd \ r"} } Interact

[Email protected] expect]# chmod a+x 1.expect

[[email protected] expect]#./1.expect//Run script log in to remote machine, logout can exit

2) script to exit after executing command

[Email protected] expect]# vim 2.expect

#!/usr/bin/expect Set user "root" Set passwd "123456" Spawn ssh [email protected] Expect { "Yes/no" {send "yes\r"; Exp_continue} "Password:" {send "$passwd \ r"} } Expect "]*" Send "touch/tmp/12.txt\r" Expect "]*" Send "echo 1212 >/tmp/12.txt\r" Expect "]*" Send "exit\r"

[Email protected] expect]# chmod a+x 2.expect

[Email Protected]entos expect]#./2.expect

3) pass parameters Log in, script to exit after executing command

[Email protected] expect]# vim 3.expect

#!/usr/bin/expect Set user [lindex $argv 0] Set host [lindex $ARGV 1] Set passwd "123456" Set cm [lindex $argv 2] Spawn ssh [email protected] $host Expect { "Yes/no" {send "yes\r"} "Password:" {send "$passwd \ r"} } Expect "]*" Send "$cm \ r" Expect "]*" Send "exit\r"

Note : The parameter format defined here is "$ARGV 0", which is not the same as our shell definition parameter format "$". CM defines the commands that need to be executed later.

[Email protected] expect]# chmod a+x 3.expect

[Email protected] expect]#/3.expect root 192.168.0.10 "CAT/ETC/PASSWD"

4) automatic synchronization of file scripts

[Email protected] expect]# vim 4.expect

#!/usr/bin/expect Set passwd "123456" Spawn Rsync-avzp [Email protected]:/tmp/12.txt/tmp/ Expect { "Yes/no" {send "yes\r"} "Password:" {send "$passwd \ r"} } Expect EOF

Note : EOF corresponds to the end meaning; In addition, for remote transfer of files, both the local and remote machines must have Rsync installed.

[email protected] expect]# Yum install-y rsync

[Email protected] expect]# chmod a+x 4.expect

[Email protected] expect]#./4.expect

5) Specify the host and the files to synchronize

[Email protected] expect]# vim 5.expect

#!/usr/bin/ Expect set passwd "123456" set host [lindex $argv 0] spawn Rsync-avzp $ file [email protected] $host: $file "yes/no" {send "yes\r"} "password:" {send "$passwd \ r"} Span style= "font-family: ' Microsoft Jas Black ', ' Microsoft Yahei ';" > expect eof

[Email protected] expect]# chmod a+x 5.expect

[Email protected] expect]#/5.expect 192.168.0.10/tmp/12.txt

Description : To achieve synchronization, unification must be achieved, that is, all remote machine passwords are the same, and the file paths are consistent. The $file here is the same file path as the local and remote machines, so that synchronization can be achieved. To achieve multiple remote machine batch synchronization, we do the following:

[[email protected] expect]# touch/tmp/ip.txt//IP list

[[email protected] expect]# for IP in ' cat/tmp/ip.txt '; do echo $ip;./5.expect $ip/tmp/12.txt; Done

Ii. building a file distribution system

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This article is from the "M April Days" blog, please be sure to keep this source http://msiyuetian.blog.51cto.com/8637744/1712233

"Distribution system" of shell programming