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62 posts are tagged "linux"

Setting up a ThinkPad x250 with Linux

Two chapters in this article are Debian-specific, the rest is more or less Archlinux-specific. It never grew into the device-specific alround tutorial I envisioned and has been partially superseded by this article. The ThinkPad itself is in daily use. No regrets there! BIOS Update The latest BIOS .....

Getting email off my web server with msmtp (and PHP)

Sometimes I want to get a message from my server, e.g. diagnostic stuff from services (SMART daemon, fail2ban), or if someone tries to contact me on my website, and I want it sent to one of my email addresses which is not maintained on that server. I used to use sSMTP for this, but it seems to stop .....

Time not synced

I noticed that my server's (Debian stable) datetime was way off. Years. Strange, because I was sure I had enabled systemd-timesyncd (but apparently never gave it a second thought after that). Looking at systemctl status systemd-timesyncd I found this cryptic message: ● systemd-timesyncd.service - Ne.....

Encrypt any block device

Goal A hard drive or a USB stick set up in this way is recognised by common filemanagers (e.g. Thunar, PCManFM) - it shows up as an encrypted device in the side bar, a password dialog pops up, and the twofold decrypt/mount process happens in one click. Device encryption, performance considerations W.....

Disable the Linux kernel watchdog

journalctl -b | grep watchdog; sudo dmesg | grep watchdog Both commands return something like NMI watchdog: Enabled. Permanently consumes one hw-PMU counter. I have no use for this watchdog on a desktop computer. This link already contains all the information required to disable it, but here's the m.....

Record system audio output with ALSA

This was written & tested on an Archlinux system, but I believe it applies to most Linux/ALSA systems. ALSA loopback device We assume a single run-of-the-mill Intel sound card, mapped as card 0. We will create a virtual loopback card 1. #> modprobe snd-aloop aplay -l The loopback device works.....

Disable a USB port and the connected hard drive

And enable it when required. Also see this related article. Premise & problem I have a USB hard drive used only for weekly automated backups. It is always connected to the same port and never gets removed. At all other times I want this drive to be unmounted, off, invisible, powered down. I wa.....