The command :
tar -cvfz -X excludeList -g 20150407.snar 20150407-full.tar.gz ~
tar-cvfz – creates all the files.
-X excludeList – creates a folder where one can exclude the files that need not be backed up.
-g .snar – this is the command used for incremental backup.
.tar.gz ~ – create .gz files which can be extracted later
- At first do a full blind backup of all your files.
- Then for the next backup, create a new .snar file and copy the old .snar to the new one.