qubes-doc/UserDoc/ConfigFiles.md

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Qubes specific VM config files

Those files are placed in /rw, which survives VM restart, so can be used to customize single VM (not all VMs based on the same template).

• /rw/config/rc.local - script run at VM startup. Good place to change some service settings, replace config files with its copy stored in /rw/config etc. Example usage:

  # Store bluetooth keys in /rw to keep them across VM restarts
  rm -rf /var/lib/bluetooth 
  ln -s /rw/config/var-lib-bluetooth /var/lib/bluetooth
  

• /rw/config/qubes-ip-change-hook - script run in NetVM after external IP change (or connection to the network)

• /rw/config/qubes-firewall-user-script - script run in ProxyVM after firewall update. Good place to write own custom firewall rules

Note that scripts need to be executable (chmod +x) to be used.