In this video, we will learn how to use the tar command to perform automated incremental backups. Incremental backups are a great way to save storage space and reduce backup times. Tar makes it easy to create incremental archives.
We will start by creating an initial full backup of the files and directories using the tar command with -cvzf and --listed-incremental options. We will also automate the backup task by creating a cron job to perform subsequent incremental backups.
We will demonstrate the process with an example of a directory named incrementalbkp containing text files. The video will cover the following steps:
Step 1: Create an Initial Full Backup
Use the tar command with -cvzf and --listed-incremental options to create a compressed archive file and specify the name of the index file that will keep track of the backup.
Step 2: Perform Subsequent Incremental Backups
Use the tar command with the -g option to specify the index file created in step 1. This will create an incremental backup archive that includes only the files that have been added or modified since the last backup and updates the index file with the changes.
Step 3: Extract the Incremental Backup
Use the tar command with -xvf options to extract the files from the incremental backup.
Step 4: Repeat as Necessary
Repeat steps 2 and 3 as many times as necessary to create additional incremental backups and extract them when you need to restore your data.
Step 5: Automate Incremental Backup Process
Use the tar command with the -listed-incremental option and the date command to create a unique name for the backup file. Then, schedule the backup to run every day at a certain time using a cron job.
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