Tag: Ubuntu

technology

Encrypt with LUKS an unencrypted LVM Ubuntu 22 Server without system reinstallation

Keep your data safe. Device loss or unauthorized access can be mitigated by encrypting drive in your server and workstation. So you may have a Ubuntu Linux installation on your bare metal or virtual machine. Does it have an encrypted drive? If the answer is no, then you could be in trouble when device is stolen or lost, or someone just gained unauthorized access to your hardware. In this short step-by-step article you can see what steps your should take to encrypt your unencrypted drives without need to reinstall the system. When speaking workstation, there is much less concern about

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Create own shorcut icon in Ubuntu 22 panel

If you want to run some curl on icon click from Ubuntu 22 panel, then you need to create file in ~/.local/share/applications: Then after few seconds, press special key (aka Windows key) and type your “application” name. You can grab and paste it onto application panel to be shown as a shortcut.

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Mounting SSD drive as swap in VM

First of all this SSD drive which I use is somehow faulty. It is a Goodram SSDPR-CX400-01T-G2 drive of 1TB. It have been working fine for few weeks until some construction worker made a electric short causing some abnormal frequences in wires resulting a faulty drives and memory sticks. One of victim was this drive: This drives for sure has some issues as at least one of tools shows that it as a problematic badblocks. Second of all in regular use it fails to run VM. It once switched into read-only mode in VM filesystem then after formatting it it

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Failed to load library libOpenCL.so.1

Today I came back to my OpenCL project (can be found here). I have had not tried it on my fresh Ubuntu 22 installation on my Dell g15 with RTX 3050 Ti. Altough I’ve got NVIDIA driver metapackage installed my program reported that there is some problem with shared library: You can check if the driver is selected in system About window. So there it is in my case, but nvidia-selector command reports that I have nvidia-driver-525 which is weird as drivers tab says I have installed driver 470. On the other hand, running nvidia-smi command says I have enable

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pg gem on Ubuntu 22

I thought that installing pg gem on my clean Ubuntu 22 will be easy, but no. I got some weird message: So I tried to force installation: After this: On this Ubuntu 22 release installing Ruby interpreter from packages you got 3.0.2p107. The problem might be because of pgadmin4 which I installed before, so it could break something.

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SMB shares on Ubuntu 22 server

SMB shares can be created either with UI on a desktop version or command line on a server installation. You can use this shares both on Linux stations and Windows boxes as well. We are going to create editors group and add current user to this group. Share location is under /data folder which is owner by editors group who’s participants can read and write to this shares folders. Now once again edit smb.conf file to add a share configuration: Restart smbd service: And the last thing is to map system users to SMB users:

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Reinstalling GRUB

In one of my previous posts I mentioned some troubles regarding reinstalling Ubuntu 22, loosing ability to select OS and to boot at all actually. I found that Ubuntu 20 recognizes properly my fresh Windows installation but Ubuntu 22 does not. So I stayed with version 20 however here was no OS selection, which translates to broken GRUB installation. After Ubuntu 20 installation finished it tried to put bootloader but failed to do this because of drives numbering. My first drive in Lenovo Thinkpad T420s is mSATA but computer and operating system thinks that this is my second drive. My

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Windows/Ubuntu dual boot issues

I have dual boot on my Lenovo Thinkpad T420s, Windows 10 and Ubuntu 22. Actually I had, because I tried to reinstall Ubuntu 22 and I’ve lost my dual boot and ability to boot at all. So I tried few things: reformat manually EFI and root partitions os-prober and update-grub setting root and prefix at grub rescue grub-install Windows installation troubleshooting Unfortunately it does not work. Something went terribly wrong. To bring back Windows first boot from installation media and go for command prompt: This way I was able to boot into Windows once again, but unable to do it

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Ubuntu resize LVM

During installation Ubuntu will create LVM with half of the space available. In order to expand it to whole space available you need to extend logical volume and expand file system as follow:s