I have a NAS running Open Media Vault (OMV) and this week it decided to not display the web front end. When browsing to http://omvIPaddress I received the below error: OMV\Exception: Failed to read file ‘/var/cache/openmediavault/cache.omv\controlpanel\login_js.json’ (size=0). in /usr/share/php/openmediavault/json/file.inc:207 To resolve the issue I connected to the NAS using secure shell: ssh root@ipaddressOfYourNAS and supplied the root passwordAfter authenticating and connecting I ran omv-aptclean and rebooted the server for good measure. I was able to access the web front end again after running omv-aptclean as per above.
In this video I show the steps on how to install PyQt 4 on Elementary OS which should work on all Ubuntu based Linux distributions. I already had PyQt 5 installed but my study guide requires PyQt 4 so I decided to install and run both on my system. Here’s the steps: Open a terminal and run the below to install PyQt 4 sudo apt-get install python3-pyqt4 sudo apt-get install libqt4-dev sudo apt-get install python-qt4 qt4-dev-tools python-qt4-dev pyqt4-dev-tools Here’s a video if that’s more to your liking: