systemd Documentation Brandon Philips brandon@ifup.org tmpfiles.d 5 tmpfiles.d Configuration for creation, deletion and cleaning of volatile and temporary files /etc/tmpfiles.d/*.conf systemd-tmpfiles uses the configuration files in /etc/tmpfiles.d/ to describe the creation, cleaning and removal of volatile and temporary files and directories which usually reside in directories such as /run or /tmp. Each configuration file is named in the style of /etc/tmpfiles.d/<program>.conf. The configuration format is one line per path containing action, mode, ownership and age fields: Type Path Mode UID GID Age d /run/user 0755 root root 10d f Create a file if it doesn't exist yet F Create or truncate a file d Create a directory if it doesn't exist yet D Create or empty a directory x Ignore a path during cleaning. Use this type to exclude paths from clean-up as controlled with the Age parameter. Note that lines of this type do not influence the effect of r or R lines. Lines of this type accept shell-style globs in place of of normal path names. r Remove a file or directory if it exists. This may not be used to remove non-empty directories, use R for that. Lines of this type accept shell-style globs in place of normal path names. R Recursively remove a path and all its subdirectories (if it is a directory). Lines of this type accept shell-style globs in place of normal path names. The file access mode to use when creating this file or directory. If omitted or when set to - the default is used: 0755 for directories, 0644 for files. This parameter is ignored for x, r, R lines. The user and group to use for this file or directory. This may either be a numeric user/group ID or a user or group name. If omitted or when set to - the default 0 (root) is used. . These parameters are ignored for x, r, R lines. The date field, when set, is used to decide what files to delete when cleaning. If a file or directory is older than the current time minus the age field it is deleted. The field format is a series of integers each followed by one of the following postfixes for the respective time units: s min h d w ms m us If multiple integers and units are specified the time values are summed up. The age field only applies to lines starting with d, D and x. If omitted or set to - no automatic clean-up is done. screen needs two directories created at boot with specific modes and ownership. d /var/run/screens 1777 root root 10d d /var/run/uscreens 0755 root root 10d12h systemd1, systemd-tmpfiles8