What is something *new* you have learned about Linux within the past 7 days?

////// · 01-13-2022, 07:22 PM

i tried first time rrdtool, it produces nice graphs of my network traffic

enigma9o7 · 01-13-2022, 10:54 PM

I just learned the reason why apt repos are http instead of https is cuz the packages are signed anyway so https would be redundant.

Turbocapitalist · 01-13-2022, 11:28 PM

It's more a hardware related means to run GNU/Linux, but I found out that it's dead simple to boot GNU/Linux on Raspberry Pi models 3B+ and 4B off of USB devices. That method occupies a USB port of course, but if all four are not needed it is a lot faster and more robust physically, not to mention more cost effective.

fatmac · 01-14-2022, 04:32 AM

Been USB booting RPi since I reprogrammed the 3B, must be a couple of years at least now.

But, beware that some chips in external drives & cables don't allow booting a RPi, whilst they are still OK as external storage.

What I've learned, is that the new KMS driver is faulty, or at least, it can't handle some EDID info from some monitors/TVs, & still needs some work.

clsgis · 01-15-2022, 01:36 AM

TIL the vim-tiny package has a little bug. If you invoke "vi" from a shell in an xterm, and it's the vi from vim-tiny, the program asks the terminal to alert it to focus changes. But when it's in vi compatibility mode, vim.tiny doesn't know what to do with those alerts. So it beeps and does a "stopInput" event. Jumps from input mode to edit mode if you move the mouse out of its terminal window.
That's because "set compatible" is NOT commented out, in /etc/vim/vimrc.tiny.

I hit this annoyance in Raspberry Pi OS Bullseye but they got it from upstream Debian due to their package choices. Armbian on Orange-Pi and Nvidia L4T on Jetson don't have the problem because they ship with vim-basic, not vim-tiny.

You can fix it by putting "set nocompatible" in your ~/.vimrc if you don't want to touch /etc/vim/vimrc.tiny

cjspizz · 01-15-2022, 08:58 AM

Quote:

Originally Posted by //////

i tried first time rrdtool, it produces nice graphs of my network traffic

What does the bash script in your signature do?

jgha · 01-17-2022, 05:58 PM

I've been installing Arch a lot lately (sole system on an old laptop, 2 bootable systems on a new desktop, plus another in VirtualBox). I like the idea of minimal desktops - Openbox, IceWM - so ran into plenty of challenges getting everything to hang together. Polkit authentication agents and Notification daemons were a whole new world for me. They would be included in a fully fledged desktop by default, but you have to install them yourself if you go down the 'minimal' route.

Installing Arch is a great way to learn new things about Linux, and the documentation available is excellent.

kabirbg · 01-17-2022, 06:44 PM

I learned that being on the bleeding edge of things isn't always a good idea. I updated my Artix system with `pacman -Syu` and updated the Linux kernel from 5.15.6 to 5.16.0; after the reboot for some reason an old kernel was booted up (like, 5.12!) even though 5.16 was installed. Still not quite sure why it happened, but I somehow managed to fix it... but there was that moment of quite literal 'kernel panic' --- not on my computer, but in my head!

adrian_stephens · 01-18-2022, 12:43 AM

I've been trying to find a way to replace Zoom + VoiceMeter Banana on Windows, in which a desktop with sound is shared and there are two usb headsets plugged into the local machine so that these two and remote participants can all hear each other and the desktop sound.

Using jack and pipewire (pulseaudio emulation) allowed me to mix & route audio between the headsets and zoom just fine.
But the zoom desktop sharing sound doesn't work with pipewire, even when it is emulating pulseaudio.

You can understand the problem from the zoom developers' point of view - which sound api should they support? And why?
But it does mean I have one more reason to keep a Windows machine live.

Reziac · 01-18-2022, 01:01 AM

I have learned that out of all the KDE-distros that even vaguely appeal, only OpenMandriva gets the settings right for a network printer. Well, at least once I had the right settings, I could copy 'em to the other systems... tho you'd think since they all use the same config utility, they'd all spit up the same results??! Nooo, that would be too easy!!

Uncleoilybag · 01-18-2022, 04:14 AM

I have learned that Qutebrowser is a fantastic browser for people like me who don't like /can't use a mouse. Combining this withkeynav makes life a lot easier.

pjorgefig · 01-18-2022, 04:24 AM

Hello

Since last week: iptables

Thanks

////// · 01-18-2022, 06:45 AM

Quote:

Originally Posted by cjspizz

What does the bash script in your signature do?

it is mp3 server that you can listen at 127.0.0.1:8020

MadeInGermany · 01-18-2022, 02:54 PM

@////// Missing a +1 ?
The following allows special characters in filenames,
and avoids playing a title twice in a row.

Code:

#!/bin/bash
PL=$( find /xxx/music -name "*.mp3" -type f )
NUM=$( echo "$PL" | wc -l )
{
while true; do
  until
    r=$(( RANDOM%NUM + 1 ))
    [ $r != $lastr ]
  do :
  done
  lastr=$r
  s=$( echo "$PL" | sed -n "${r}p" )
  echo "HTTP/1.0 200 OK\nContent-Type: audio/x-mp3stream\n\n"
  cat "$s"
done
} | nc -l -s address -p 8020

Trihexagonal · 01-18-2022, 04:56 PM

I taught myself to set up Bluetooth on Kali and pair up with another device.

I had never used Bluetooth before and after several unsuccessful attempts at pairing up to my tablet got out spooftooph. I watched it for a bit to get the hang of what it was doing and that was enough to get me going.