If there is docker image for what you need, use docker image.

If not I would recommend systemd-nspawn, it’s chroot but can run systemd init, with efforts you can run GUI applications from it too., wiping that is just sudo rm -rf.

On Ubuntu 22.04 based distro, you can try install HWE (hardware enablement) kernels but you need a phone that can share WIFI/mobile connection through USB cable.

sudo apt update; sudo apt install linux-generic-hwe-22.04

Try posting output of lspci command here, gives us more information about your laptop hardware.

nano by default puts a new line character at the end of file, can you use stat command to check if file size is off by 1 byte?

I think thunderbird always delay major version upgrade until <version>.2.

If you observe their changelog:

115.0: only offer binary download, not as upgrade

102.0: only offer binary download, not as upgrade

102.1.2: only offer binary download, not as upgrade

102.2: no such disclaimer

They also has the same disclaimer for 91.x, that’s how Thunderbird decided to distribute update.

Maybe your BitTorrent software eats all the bandwidth so other networking programs shows bad performance?

Have you tried pacman without running your BitTorrent software?

Less likely to break when you perform kernel upgrade. (new major version)

I know Micron Storage Executive can run in Ubuntu Live USB, too bad Micron/Crucial doesn’t have attractive offering where I live.

Ubuntu freezes package version number (with only few exceptions like browsers) when they release a new version.

You will either need to wait for a new version (most likely 23.10) or use 3rd party maintained PPAs.

You probably need to do this with a live system (not using a system that is on the partition you want to rename)

I tried port scanning part on 127.0.0.1, there was no output until I supplied -v.

Command I used with success: nc -z 127.0.0.1 1-65535 -v 2>&1 | grep succeeded

Edit: I installed openbsd version of netcat