I have Bash on Ubuntu on Windows.
The output of
lsb_release -a is the following.
No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.5 LTS Release: 14.04 Codename: trusty
Should I upgrade? Do I risk to break it?
Yes its possible and there are two options:
lxrunto install and uninstall
lxrun /uninstall lxrun /install
The second method might work according to the link given below, but that article is
2016 so this method might work.
Here is clip from Microsoft
Note: WSL will install Ubuntu version 16.04 (Xenial) instead of Ubuntu 14.04 (Trusty) in an upcoming release. This change will apply to Insiders installing new instances (lxrun.exe /install or first run of bash.exe). Existing instances with Trusty will not be upgraded automatically. Users can upgrade their Trusty image to Xenial using the do-release-upgrade command.