thank you in fact , I have reinstalled ubuntu once again and lost all of my data because of ext4 file-system and I will never try an unstable versuin again!
-- command-not-found has crashed https://bugs.launchpad.net/bugs/282446 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs