So you have a USB Camera plugged in to your Ubuntu box. You then notice that your camera’s led is on (could also be true for an integrated web camera on a lap top). This could be because you left a camera app running and forgot to turn it off (exit). The app Cheese for example or worse yet you closed all camera apps but you have been hacked. I won’t go into how to clean your PC here but if you want to disable your USB/integrated camera here are two very useful lines”
- exit cheese or your camera app
- sudo modprobe -r uvcvideo <– to disable the camera
- restart cheese no LED or camera image
- exit cheese
- sudo modprobe uvcvideo <—- to enable the camera
- restart cheese LED and image
Now this will not be preserved across reboot so the following might prove equally useful:
sudo vi /etc/modprobe.d/blacklist.conf
add the following two lines at the end of the file
toggle “cheese” to see if you can view webcam contents or reboot
remove those two lines to restore webcam usage.
This took me quite a while to get it working. Everything I read and that which was suggested did not work. Then I found one write up that gave me hope and now i will pass that on to you. See this link to see how.
I updated my webserver with Ubuntu 18. Then I decided to upgrade to Ubuntu 19. But first I needed a backup of WordPress. I decided on “UpdraftPlus“. I backed up my WordPress data and moved it to a thumb drive. Then for the move to Ubuntu 19. It failed. After about 1.5 hours the process just hung. I did a hard reset and that was it. I should also point out that I had no power to the PC internals – MB, disks so I am assuming that shortly after I started the upgrade the Power supply failed. Can’t complain: 10 years x 24 hours a day. Took me 4 days to rebuild the box. I had good Readme.files but many of the commands in them were no longer valid because mysql, apache2 had changed their syntax for their commands/statements. Lots of Googling. Anyway once I got the box configured to support WordPress and got WP downloaded and installed I once again downloaded the UpdraftPlus plugin for backups/restore. I moved the backup files from the thumb drive to “wp-content/updraft” on the newly build PC and using UpdraftPlus restored the data. PERFECT!!! About 2 minutes and my WordPress blog was recovered vs. 4 days of rebuilding a PC. UpdraftPlus is definitely a winner.
I recently received a new PTZ camera (works with the Yoosee video application) I ordered the camera from AliExpress. I got the video side working fairly easily with the Blue Iris camera app, but had some real difficulty getting the camera to pan/tilt/zoom. In an associated page I will show you what I did. It is quite easy actually. You can read the details here .
After a gateway swap out that AT&T promised would be simple the website is finally back online. Much of the problem was me finding the time. But here we are!!! Tah Dah!!!
Got an IP camera to livestream to Youtube using Blue Iris as the video streaming application. There were a few bumps, for example why does my stream run for several hours/days then suddenly quit? The answer to that question is here
Yesterday I bought a new “cruncher”: a Dell AMD Ryzen 7 1700 with an AMD Radeon RX 580. As soon as I got home I removed Windows 10 and installed Ubuntu 16 (tried 17 on this node but had issues). This PC required the installation of new AMD GPU PRO driver support because Einstein@Home did not recognize the onboard GPU. There were errors in the AMD procedure which I will address later in a more detailed page on this website. Now for the “bad news” Once the drivers were successfully installed Einstein@Home is reporting the GPU as being a 480 and not a 580. I will have to look into this and depending on what I find contact the store to see what is going on.
Had to evacuate to avoid Hurricane Matthew. Had planned on a 2 day outage but fortunately for me a 1000s more Matthew spared us so down time was only ~24 hours.