[Bug-tar] Scripted Backup overwriting its own tar file

[Serge]

I tried to implement the scripted backup, as documented in the Info TAR, 
and I cannot get to work properly.

In the Backup variable BACKUP_DIRS, I have two directories:  /etc and 
/home/myself/practice.  In the Backup variable BACKUP_FILES I also 
mentionned two files, say file01 abd file02.

Executing the command backup, I finally got a successful completion, 
that is RC0 for the backup of the two directories, and of the 
Miscellaneous Files.  But it seems that every successive sub-routine 
overwrites the previous one.  The end result is that my BACKUP_FILE only 
includes the files of the Miscellaneous only.  

Should not the Tar operation be --append instead of --create ?

I am newbie with Linux, and I am not an IT person.  So I hoped the above 
clearly show my problem.

Serge