How to make Fedora Linux not clean some files in /tmp/?

On my Fedora 20, I find that the system automatically clean up file under /tmp/. This is convenient. However, it cause some problems for some programs.

For example, HDFS puts its DataNode pid file under /tmp/ by default like After it is cleaned up, the script will consider there is no DataNode running.

How to make Fedora Linux not clean some files in /tmp/?

systemd has a systemd-tmpfiles tool that creates, deletes and cleans up volatile and temporary files and directories.

You can control the behavior of the systemd-tmpfiles by configuring its configuration file located at


Check the tmpfiles.d for the format of configuration.

For the purpose of excluding *.pid files, you can add one line as follows

x /tmp/*.pid

Eric Ma

Eric is a systems guy. Eric is interested in building high-performance and scalable distributed systems and related technologies. The views or opinions expressed here are solely Eric's own and do not necessarily represent those of any third parties.

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