How to manage temporary files in the Debian system

Detailed explanation of temporary file management in Debian system

The Debian system uses a variety of mechanisms to efficiently manage temporary files to ensure that the system runs smoothly and keeps it clean. This article introduces the temporary file management strategy of the Debian system in detail.

Temporary file storage location

The Debian system mainly uses the following directories to store temporary files:

• /tmp : Store temporary files that are automatically cleared after system restart.
• /var/tmp : Store temporary files that need to be retained for a long time. Debian 13 version has added an automatic cleaning mechanism, and files that exceed 30 days will be automatically deleted.

Debian 13 Temporary File Management Improvements

Debian version 13 has made the following improvements to temporary file management:

• Migrate the /tmp directory to tmpfs storage: leverages volatile memory storage /tmp directory files to improve performance and reduce storage media wear.
• systemd timed cleaning service: Introduce the systemd service to clean files in the /var/tmp directory for more than 30 days.
• /tmp directory file retention period shortened: the default retention period is adjusted to 10 days to accommodate more frequent file updates.

Temporary file creation and deletion

To create a temporary file, you can use the following command:

• tempfile command: For example, tempfile /tmp/fileR5dt6r
• mktemp command: For example, mktemp /tmp/tmp.ojEfvMaJEp

To delete temporary files in /tmp directory, you can use the following command:

• rm -rf /tmp/* (Use with caution, this command will delete all files in the /tmp directory)

Important Tips

The above information is based on the latest information, but as the Debian version is updated, specific details may be adjusted. It is recommended to consult Debian official documents and update logs for the latest information.

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