Category Archives: Sys Admin

Material related to systems administration.

Remove Boot Text On The Raspberry Pi For Noobs

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Today I read Remove Boot Text On The Raspberry Pi For Noobs:

vim /boot/cmdline.txt

You will see a single line with all the boot options. Scroll along and change the following making sure not to add any linebreaks:

  • Replace console=tty1 to console=tty3 to redirect boot messages to the third console.
  • Add loglevel=3 to disable non-critical kernel log messages.
  • Add logo.nologo to the end of the line to remove the Raspberry PI logos from displaying
vim /boot/config.txt
  • add disable_splash=1 at the end of the file.

DRI3

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Today I was reading How to Install The Latest AMD Radeon Drivers on Ubuntu 18.04 Bionic Beaver Linux wherein I read that “[enabling] DRI3 will increase graphical performance with the AMDGPU drivers”. You can read about DRI3 but the bottom line was to add the following to your /etc/X11/xorg.conf file:

Section "Device"
  Identifier "AMDGPU"
  Driver "amdgpu"
  Option "AccelMethod" "glamor"
  Option "DRI" "3"
EndSection

How to Customize Firefox’s User Interface With userChrome.css

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Today I read How to Customize Firefox’s User Interface With userChrome.css. You may need to enable with e.g. Firefox 69: userChrome.css and userContent.css disabled by default. If you change userContent.css you need to open your page in a new tab to force an update. I would guess that if you change userChrome.css you will need to restart Firefox (I don’t know I’ve only been using userContent.css).

I should be clear: there are two files: userChrome.css (which affects Firefox features like toolbars and tabs etc) and userContent.css (which affects web pages loaded in Firefox).

I’ve been using userContent.css to fixup CSS on various websites. You can limit your changes to a particular domain in this way:

/* 2020-07-01 jj5 - SEE: https://exploringjs.com/impatient-js/toc.html */
@-moz-document domain(exploringjs.com) {
  a:visited { color: purple !important; }
}

Konsole column width

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So after having read this I was trying to configure Konsole by editing my config files under

~/.local/share/konsole

and I couldn’t get my column width config to apply.

The problem was that I was configuring column width with the TerminalCols setting, but the correct setting is actually TerminalColumns, which was difficult to figure out! Not sure how I managed to get that wrong in the first place, but it’s fixed now.

My new Konsole dimension settings are:

TerminalColumns=100
TerminalRows=42