rsync -av --delete /home/programmers/Labels /media/saved_labels

but I am not able to select some kind of files doing the backup

I tried in many different way:

 rsync -av --delete /home/programmers/Labels/*.java /media/saved_lab
 rsync -avr --delete /home/programmers/Labels/*.java /media/saved_lab

The message that I get is :

sending incremental file list
rsync: link_stat "/home/programmers/java/PROJECTS_development/Labels/*.java" failed: No such file or directory (2)

sent 18 bytes  received 12 bytes  60.00 bytes/sec
total size is 0  speedup is 0.00
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1165) [sender=3.1.0]


===========

I would like to know how to start this command (after it is inside a shell script) at the boot.

Thank you very much

Regards

Angelo