Categories
Linux Mastering Development Ubuntu

Unable to switch Linux boot order via SSH

I have to Linux dist installed on two separate HDDs, currently I’ m working from home so sometimes need to switch OS back and forth. I tried all these steps from this link: Set “older” kernel as default grub entry but nothing works for me. Each time Debian 9 Stretch being loaded. How can I […]

Categories
Linux Mastering Development Ubuntu

arrow/exclamation symbol on top bar

A red explosion symbol with an exclamation mark appearred on the top bar and then this amber explosion with an arrow, which is shown in the screenshot. I can’t find out what they are for or signifying. Help welcome.

Categories
Linux Mastering Development Ubuntu

Some normal updates killed my sound device

I am a plain vanilla pulseaudio user. No special settings. Been using kubuntu 18.04 with good audio on this notebook for years. A month or two ago, a kernel update broke my audio, so I reverted to the previous kernel until the next one came out which worked again. I just installed some normal updates […]

Categories
Linux Mastering Development Ubuntu

libsnmp-perl 20.04 can not install

I can not install package libsnmp-perl. I hope that the text I pasted is helpful. Distributor ID: Ubuntu Description: Ubuntu 20.04 LTS Release: 20.04 Codename: focal Using sudo apt-get install libsnmp-perl gives the following error: Reading package lists… Done Building dependency tree Reading state information… Done Some packages could not be installed. This may mean […]

Categories
Linux Mastering Development Ubuntu

Upgrade 18.04 to 20.04 hangs after “Adding boot menu entry for EFI firmware configuration”

These are the last lines I see. There does not seem to be an error message, but after 20 minutes the picture is the same. When I interrupt the update and restart the laptop I receive a kernel panic. Luckily, by booting into a live system and merging the lvm snapshot I am back at […]

Categories
Linux Mastering Development Ubuntu

Kicked to initramfs after rebooting for no reason

I’m running Ubuntu 16.04 on an HP T620 Thin Client. Since a few days ago I’ve been struggling with this new issue. I started up my PC normally, everything looked just fine, but Psensor indicator displayed only CPU usage (that caught my attention because I had configured GPU indication as well). I thought "OK fine, […]

Categories
Linux Mastering Development Ubuntu

SFTP with Active Directory authentication (RealmD and SSSD)

What it should look like: My Ubuntu VM is connected through SSSD to my Active Directory Server. I want an SFTP Server that jails incomming Users that have a specific AD Group (USR-SFTP@domain) assigned and only SFTP and not SSH. My Admin Users with the their Group assigned (Domain-Admins@domain) should still be able to log […]

Categories
Linux Mastering Development Ubuntu

Kicked to initramfs after rebooting for no reason

I’m running Ubuntu 16.04 on an HP T620 Thin Client. Since a few days ago I’ve been struggling with this new issue. I started up my PC normally, everything looked just fine, but Psensor indicator displayed only CPU usage (that caught my attention because I had configured GPU indication as well). I thought "OK fine, […]

Categories
Linux Mastering Development Ubuntu

Unbuntu 20.04 freezes when booting not connected to thunderbolt device

When I try to boot into Ubuntu and my laptop (Dell Latitude 7400) is disconnected to thunderbolt dock (Dell WD19TB) it just freezes and a black screen shows up. after a few seconds the fan will work heavily and the only thing that I can do is powering off using power button. When I turn […]

Categories
Linux Mastering Development Ubuntu

How to solve the “Error Mounting…” error dialog in LXDE / PCManFM

I’m getting the following dialog from time to time when playing music from my external HD (Seagate Expansion+ 2TB): Whenever that happens, my music player (cmus) skips to the next track. This happens with any music player I use, it doesn’t happen all the time though. If not solving the issue, I’d like to no […]