> For the complete documentation index, see [llms.txt](https://knowledge.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.illumina.com/software/dragen/software-dragen-troubleshooting-list/000008620.md).

# Instructions to back up DRAGEN license files when upgrading the operating system on a DRAGEN server

These instruction are applied when the operating system (OS) is upgraded on a DRAGEN server. When the user is updating the OS, all the DRAGEN license files are deleted. During an OS upgrade users should save the pre-existing license files and store them off the system. After the OS upgrade is complete, the license files can be placed back onto the system and users can resume using them as expected. Users can use the instructions below to backup the license files and re-apply as a default:

1. Backup License files using the command: $ tar -cvpf licenses.tar /var/lib/edico
2. Restore the DRAGEN license files: $ tar -xvf license.tar -C /

(-C option: send your extract files to other locations, followed by target location)

Resources:

[DRAGEN Bio IT Platform v3 Oracle 8 upgrade instructions - Illumina Knowledge](https://knowledge.illumina.com/software/dragen/software-dragen-reference_material-list/000007438)

[DRAGEN license information and installation - Illumina Knowledge](https://knowledge.illumina.com/software/on-premises-software/software-on-premises-software-troubleshooting-list/000003834)

[DRAGEN Bio IT Platform v4 Oracle 8 upgrade instructions - Illumina Knowledge](https://knowledge.illumina.com/software/dragen/software-dragen-reference_material-list/000007439)

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #8620), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000008620%20-%20Software%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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