[Trisquel-users] Re : Password protected directory

[lcerf]

I though that there should be an option to simply put a password on a  
directory and rename it something like .muttmailrc to make it look like a  
part of the system.

That is what 'gpg -c' does.  You can use option -o to specify the name of the  
encrypted file.  And, as chaosmonk told you, there is a Nautilus extension,  
seahorse-nautilus, to do that with the mouse, from GNOME's file manager,  
which I happen to use: right-click on the file/directory and choose  
"Encrypt..." in the contextual menu.