VirtualBox – Failed to acquire the VirtualBox COM object.

VirtualBox failed to acquire the VirtualBox COM object.

Under the Details it was complaining about VirtualBox.xml

Looking in Windows Explorer in the .VirtualBox folder

C:\Users\Username\.VirtualBox

it shows that the VirtualBox.xml file being empty. Delete the file. Reinstall VirtualBox. Now go to your VM’s in

C:\Users\Username\VirtualBox VMs

Open up the VM folder and double click on the “Virtual Machine Definition” file to “reimport” them into VirtualBox.

Error Starting Peertube “no such file or directory, open ‘/var/www/peertube/storage/tmp/plugins-global.css”

systemctl status peertube shows the following error.

Error: ENOENT: no such file or directory, open ‘/var/www/peertube/storage/tmp/plugins-global.css’

Looks like an error because the global.css file is not there. You can temporarily fix the issue by creating the file.

su peertube
touch /var/www/peertube/storage/tmp/plugins-global.css

Probably an issue with a plugin being installed or something of the sort.

Sketch uses 444 bytes (1%) of program storage space. Maximum is 32256 bytes.

Sketch uses 444 bytes (1%) of program storage space. Maximum is 32256 bytes.

Arduino upload error

Looks like this can randomly happen. Things to try to resolve the problem

  1. Unplug USB cable for a little bit
  2. Restart Arduino IDE
  3. Reboot computer

More information here

https://arduino.stackexchange.com/questions/23620/problem-uploading-to-arduino-uno

LibreNMS ./validate.sh – Some folders have incorrect file permissions, this may cause issues.

Helpful article here. https://wifitechtalk.com/librenms-permissions-error/

When running the following command,

sudo /opt/librenms/validate.sh

I’ve been getting the following errors.

[FAIL]  Some folders have incorrect file permissions, this may cause issues.
    [FIX]: 
    sudo chown -R librenms:librenms /opt/librenms
    sudo setfacl -d -m g::rwx /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/
    sudo chmod -R ug=rwX /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/
    Files:
     /opt/librenms/storage/framework/views/adc52b677409cdba8d8e89dc

You can run the commands and fix the problem, but they pop up later and it does the same thing.

Create Script to fix permissions

Work around is to have a script run these commands every few minutes.

vi /root/librenms_fix_permissions.sh

Add the following

#!/bin/bash 
sudo chown -R librenms:librenms /opt/librenms 
sudo setfacl -d -m g::rwx /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/ 
sudo chmod -R ug=rwX /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/

Make the script executable

sudo chmod +x librenms_fix_permissions.sh

Add to Crontab

sudo crontab -e 

Add the following entry to Cron to run every 30 minutes

*/30 * * * * /root/librenms_fix_permissions.sh

Unity not loading scene levels

Problem: Game would finish level, but would not load next one.

The issue was that all the levels were not included in the build scene, (File -> Build Settings -> Scenes In Build) so even though the level was correct in PlayMaker, it would not load the level in the Game window while testing.

To add scene to build, open the scene up in the editor, then open the Build Settings from File -> Build Settings… or Ctrl+Shift+B and Add Open Scenes