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Finding out which DNS servers are currently being used in Linux (Ubuntu)

Submitted by Druss on Tue, 2020-12-08 21:23

So, I've been facing some DNS issues with my Ubuntu box and needed to do some debugging. While I was certain that my router was assigning the Google DNS servers (8.8.8.8 and 8.8.4.4) via DHCP to my machine, I needed to make sure that they were actually being used. Usually, I would be able to tell by looking at the output of /etc/resolv.conf oslt. However what I found in resolv.conf was

Installing a legacy pear package in Xubuntu 20.04

Submitted by Druss on Sat, 2020-09-26 20:03

Trying to install a legacy pear package on a new version of Ubuntu is a bit of a chore as things are broken. For starters, using

$> sudo apt install php-pear

$> sudo pear install foo

results in errors such as

Notice: Trying to access array offset on value of type bool in PEAR/REST.php on line 187

and

Linux: Computer immediately restarts after shutdown

Submitted by Druss on Tue, 2020-07-21 02:53

So I have a Xubuntu box, an old PC that was running Windows previously. All is peachy with the Linux install bar one thing: every time I shutdown the system, it shuts down fine, but immediately restarts again. This wasn't happening with Windows and appeared to be an issue particular to Linux or Ubuntu.

Freeplane hangs in Kubuntu 18.04

Submitted by Druss on Mon, 2019-03-11 17:58

Freeplane, a fork of the mind-mapping program, Freemind, works really well. Except for the fact that in my (K)Ubuntu installation, it sometimes hangs in the middle of editing a node. Once it becomes non-responsive, the only fix is to kill the process and restart the program. The version of Freeplane in Ubuntu 18.04 is 1.6.13. However, the current version (March 2019) of Freeplane is 1.7.7. So, it's highly possible that upgrading Freeplane to the latest version will fix this issue.

Create a bootable Windows installation USB drive using Linux

Submitted by Druss on Sat, 2019-01-19 02:32

I needed to install Windows and downloaded the 4.7GB Windows 10 ISO from Microsoft's website. Since I only had Linux machines at my disposal (and no DVD drives), I had to look to install the ISO on a pen drive. While the purists advocated that I use dd to accomplish this, I found that getting the USB to be bootable was something of a chore. So I looked for a friendlier solution and this is what I found for Kubuntu:

Netflix Playback Error Code: F7701-1003

Submitted by Druss on Sat, 2018-11-24 01:56

So I tried playing a video on Netflix in Firefox and while everything worked including the previews while hovering over a title, the actual movie/TV episode failed to play and resulted in the following error:

Playback Error Code: F7701-1003

The main thing that needs to be done is to enabled DRM support in Firefox's preferences section. (Look for a checkbox titled "Play DRM-controlled content".)

Ubuntu: qt.network.ssl: QSslSocket: cannot call unresolved function SSLv23_client_method

Submitted by Druss on Thu, 2018-10-11 22:29

I ran into this error today while running a python program in Kubuntu 18.04 (upgraded from 17.10):

qt.network.ssl: QSslSocket: cannot call unresolved function SSLv23_client_method

followed by a bunch of other similar SSL-related errors. When I checked apt, I found that my openSSL install was fine. A generous guy on IRC informed me that I was very likely missing libraries that the app was looking for. S/he asked me to try installing libssl1.0-dev and voila, it worked.

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