Thanks Steve it was indeed chattr Thanks a lot.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/772191 Title: package libpam-modules-bin (not installed) failed to install/upgrade: impossibile creare il collegamento alla copia di backup di "./sbin/unix_chkpwd" prima di installarne la nuova versione: Operazione non permessa -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs