apt-get update && apt-get dist-upgrade Ign http://ftp.hu.debian.org stable Release.gpg Ign http://ftp.hu.debian.org stable Release Ign http://ftp.hu.debian.org stable/main Packages/DiffIndex Ign http://ftp.hu.debian.org stable/main Sources/DiffIndex Hit http://ftp.hu.debian.org stable/main Packages Hit http://ftp.hu.debian.org stable/main Sources W: Not using locking for read only lock file /var/lib/apt/lists/lock W: Not using locking for read only lock file /var/lib/dpkg/lock E: Unable to write to /var/cache/apt/ E: The package lists or status file could not be parsed or opened.