When I type in sudo gainroot, then it shows on the next line: /home/user # ..I'm not totally sure what exactly I type in here next (the prismic app is saved in the documents file in app manager)? dpkg -i /home/user/MyDocs/.documents/prismicwm*.deb If I just type that in, I get : dpkg:error processing prismic_1.4.4_armel.deb (--install): cannot access archive: No such file or directory