Requirements: a backup file every 2 minutes.

Requirements: Every 2 minutes the files in the directory / home / backups / balalala backed up to the / home directory

Preparation
1. Create a source directory
#mkdir / home / backups / balalala
create the original file
#touch /home/backups/balalala/first.sh
2, create a backup directory
#mkdir / home

First, write a script have a backup function

1. Create a script
   #vi /home/backup.sh
2. Write command
   #! / Bin / SH
   cp -r / home / backups / balalala / * / home / beifen
   # files under / home / backups / balalala directory backup to the next / home / beifen directory
3. Executes a script file
   such as: sh /home/backup.sh