- “Linux Crontab 定时任务 命令详解”:http://blog.csdn.net/tianlesoftware/article/details/5315039
Automatically backup on the remote server:
Let’s firstly assumpt:
- You have a site named “example.com";
- You can login to it through a username “deploy”, and its password is “password";
- You located the contents of your site in
- Your database server is Mysql, and the database for your site is example_production.
1. SSH login:
2. Install the backup:
3. Prepare directories for backup files:
4. Generate and edit backup script:
Input the below content:
# encoding: utf-8 Backup::Model.new(:example_db, 'Dumping example Production Database') do split_into_chunks_of 250 database MySQL do |db| db.name = "example_production" db.username = "" # Replace the blank string with your real username db.password = "" # Replace the blank string with your real password db.host = "localhost" db.port = 3306 db.socket = "/var/run/mysqld/mysqld.sock" db.additional_options = ["--quick", "--single-transaction"] end store_with Local do |local| local.path = "/var/www/example/backup/db" local.keep = 10 end compress_with Gzip end
Run backup command to confirm that your config works:
Attention: Remember to update the config file if you have changed the username and/or password of the database.
5. Install whenever:
6. Generate a schedule.rb file with whenever:
The last command will create a new file named “schedule.rb” under
7. Add a daily task:
Open the file to edit:
set :output, "~/Backup/example_whenever.log" # This is important, it can help you to find the reason when failed to backup the database every :day do command "cd ~/Backup && backup perform -t example_db" end
8. Update whenever task into crontab:
9. Check whether the task is updated successfully or not:
If successed, you should see your new task shown at the bottom of the file.
Synchronize remote backups every day automatically by rsync and crontab:
Attention: Below operations are played on a different server, which is used to sync files. We assumpt its domain is
another.com and the username is
1. SSH login:
2. Write a synchronize shell script:
Input the below contents into the new file named ‘sync.sh’:
and then, assign the scripe execution authority:
Run the script to ensure everything works well:
Attention: Because it is required to be authorized to access the targer server, you should remember to copy your ssh public key to the target server(such as, example.com) before you can sync files.
3. Open user’s crontab config file:
Append the below task at the end:
Ok, that’s all. The rest work is that remember to check if there is any backups generated.