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(!) ?Discussion
Debian's traditional package management tool. For details, see AptCLI.
Error Messages
E: Could not open lock file /var/lib/dpkg/lock - open (13 Permission denied)
An attempt is being made to run more than one package management process
This error may occur if an attempt to run more than one package management process is made. For example, if a package is being installed or removed using apt-get, or dselect, it should not be possible to run another package management tool, until the package updates are complete.
A non-root user is trying to add or remove packages
This error may also occur if a non-privileged (non-root) user attempts to add or install packages, or make a change to package status information within the package database.
E: Dynamic MMap ran out of room
This error may occur if the Apt::Cache-Limit is reached. It is necessary to add an entry to the /etc/apt/apt.conf configuration file to override the default value.
APT::Cache-Limit "33554432";
E: Error occurred while processing xfmedia-dev (NewVersion1)
E: Problem with MergeList /var/lib/apt/lists/foobar
E: The package lists or status file could not be parsed or opened.
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?
A non-root user is trying to add or remove packages
This error may occur if a non-privileged (non-root) user attempts to add or install packages, or make a change to package status information within the package database.