**clean Fedora** ====== /var/cache/PackageKit/ ====== sudo pkcon refresh force -c -1 [[http://unix.stackexchange.com/questions/265755/fedora-23-can-i-safely-delete-files-in-var-cache-packagekit-metadata-updates|Source]] ====== /var/log/journal/* ====== $ journalctl --disk-usage sudo gedit /etc/systemd/journald.conf => set following parameter: SystemMaxUse=50M $ sudo systemctl restart systemd-journald.service [[http://unix.stackexchange.com/questions/130786/can-i-remove-files-in-var-log-journal-and-var-cache-abrt-di-usr|Source]]