rxtx java lib /var/lock issue

check /var/lock previlege

 

sudo chgrp lock /var/lock //make sure its group is lock

 

sudo chmod 775 /var/lock //give group lock write previlege

 

 

usermod -a -G lock bruce //add user to lock group

 

 

 

 

 

usermod example - Add a existing user to existing group

usermod -a -G ftp bruce