Cannot install translations

[oleonard]

I tried:

$ ./translate create fr-FR

Got:

Couldn't open /etc/koha/sites/koha/koha-conf.xml:
Permission denied at /usr/share/perl5/XML/SAX/Expat.pm line 75.
BEGIN failed--compilation aborted at LangInstaller.pm line 22.
Compilation failed in require at ./translate line 25.
BEGIN failed--compilation aborted at ./translate line 25.

I tried:

$ sudo ./translate create fr-FR

Can't locate C4/Context.pm in @inc (you may need to install the C4::Context module) (@inc contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.20.2 /usr/local/share/perl/5.20.2 /usr/lib/x86_64-linux-gnu/perl5/5.20 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.20 /usr/share/perl/5.20 /usr/local/lib/site_perl .) at LangInstaller.pm line 22.
BEGIN failed--compilation aborted at LangInstaller.pm line 22.
Compilation failed in require at ./translate line 25.
BEGIN failed--compilation aborted at ./translate line 25.