Feb 102017


How to automatically backup files and directories in Linux

  • February 10 2017
  • ADM



How to automatically backup files and directories in Linux - linux


This article presents how to automatically backup files and directory in Linux. This method I am using to backup the ADMFactory.com blog.

Backup script

Step 1 - archive the content

Backing up your files using tar is very simple using the following command:

# tar -cvpzf /backup/backupfilename.tar.gz /data/directory

A real example would be backing up the HTML folder for your website, my case:

# tar -cvpzf /backup/admfactory.com.tar.gz /var/www/html

Note: make sure the destination folder exists first. If not create it using the following command:

# mkdir /backup

Tar command explained

  • tar = Tape archive
  • c = Create
  • v = Verbose mode will print all files that are archived.
  • p = Preserving files and directory permissions.
  • z = This will tell tar that to compress the files.
  • f = It allows tar to get the file name.

Step 2 - create backup script

Now let's add tar command in a bash script to make this backup process automatic. Also it good to add some dynamic value in the name to make sure there is no overwriting of backup files. e.g.

Create the file using vi editor and paste below script.

# vi /backup.sh

Paste the following script and change your details.

TIME=`date +%b-%d-%y`                      # This Command will read the date.
FILENAME=backup-admfactory-$TIME.tar.gz    # The filename including the date.
SRCDIR=/var/www/html                       # Source backup folder.
DESDIR=/backup                             # Destination of backup file.

Note: I removed the v parameter for tar command line as is not needed.


In Linux, we can easily use the cron jobs in order to schedule task.

The cron jobs line has 6 parts see below explanation:

Minutes Hours  Day of Month Month Day of Week  Command
0 to 59 0 to 23 1 to 31 1 to 12 0 to 6 Shell Command

Open crontab editor utility:

# crontab -e

Note: the edit rules are similar with vi editor.

Paste the following text in the editor:

00 04 * * * /bin/bash /backup.sh

This will run the script every day at 04:00:00.

For example, if you want to run the script only twice a week:

00 04 * * 1,5 /bin/bash /backup.sh

This will run the script at 04:00:00 every Monday and Friday.

Note: the only risk that can occur is to get out of disk memory if the source folder is big.