expect script to synchronize files expect script to specify host and files to be synchronized to build a file distribution system to execute commands remotely in batches

Automatically sync files

#!/usr/bin/expect
set passwd "123456"
spawn rsync -av root@192.168.133.132:/tmp/12.txt /tmp/
expect {
"yes/no" { send "yes\r"}
"password:" { send "$passwd\r" }
}
expect eof

Specify host and files to sync

#!/usr/bin/expect
set passwd "123456"
set host [lindex $argv 0]
set file [lindex $argv 1]
spawn rsync -av $file root@$host:$file
expect {
"yes/no" { send "yes\r"}
"password:" { send "$passwd\r" }
}
expect eof

chmod +x ex4.sh
./ext4.sh  192.168.133.132 "/tmp/12.txt"

Demand Background
For large companies, there must be website or configuration file updates from time to time, and there must be many machines used, ranging from a few to dozens or even hundreds. So, automatically syncing files is crucial.

• The realization idea
  is to have a template machine first, prepare the files to be distributed, and then just use the expect script to distribute the files that need to be synchronized to the target machine in batches.
• Core command
  rsync -av --files-from=list.txt /root@host:/

Implementation of a file distribution system

• rsync.expect content
#!/usr/bin/expect
set passwd "123456"
set host [lindex $argv 0]
set file [lindex $argv 1]
spawn rsync -avR --files-from=$file / root@$host:/
expect {
"yes/no" { send "yes\r"}
"password:" { send "$passwd\r" }
}
expect eof

If it is not guaranteed that the corresponding machine also has the same file path plus -R to create it automatically

list.txt content (ensure that the file list path is also available on the other machine )  

/tmp/12.txt
/root/shell/1.sh
。。。。

ip.list content

192.168.133.132
192.168.133.133
......

If the passwords of multiple hosts are different, key authentication can be performed .

rsync.sh  content

#!/bin/bash
for ip in `cat ip.list`
doecho $ip
    
    ./rsync.expect $ip list.txt
done

Execute: chmod a+x  rsync.sh

./rsync.sh

Batch remote execution of commands

exe.sh  content

#!/bin/bash
for ip in `cat ip.list`
doecho $ip
    
    ./exe.expect $ip "w;free -m;ls /tmp"
done