[Trisquel-users] Re : Unlock Photos ?

[magicbanana]

'/' is the root of the system. Your home directory is not directly at the  
root of the system. That is you error. Here is a right command:
$ chown -R john:john ~/Photos/100NIKON
I use "~" which denotes your home directory. It is "/home/john" if you are  
using the system with the "john" account.