Find all files in a directory /path/to/directory and its sub-directories recursively:
find /path/to/directory/ -size 0 -type f
or
find /path/to/directory/ -size 0 -type f -print
Extend:
Find all files in a directory /path/to/directory and its sub-directories recursively:
find /path/to/directory/ -size 0 -type f
or
find /path/to/directory/ -size 0 -type f -print
Extend:
1. Change permission of all files:
find /<path_to_desired_directory> -type f -print0 | xargs -0 chmod 0755
2. Change permission of all folder:
find /<path_to_desired_directory> -type d -print0 | xargs -0 chmod 0644
When I searched a solution for connecting through VPN with L2TP/IPSec on Ubuntu (I used Ubuntu 18.04 at this time), I found this article and kept it in my note.
Just as a followup to the great information you provided, thought I'd give people a complete set of steps I took to get this working on Ubuntu GNOME 17.04: