This article explains how to clean up /var and /var/log partitions before the upgrade via Junos space

It uses the Slax script to run the command "request system storage cleanup no-confirm" on multiple devices.

Here are the steps to achieve this:

1. Please click here to download the Slax script. 
2. and follow the below document to apply it:

• To upload the script:

^{Importing Scripts to Junos Space}

• To Stage the script on devices:

Staging Scripts on Devices

• To execute the script on devices:

Executing Scripts on Devices