The One with the Thoughts of Frans

It’s quite simple to do but surprisingly hard to find. Mixed files and folders confuse me. They seem disorganized.

To resolve the weird “ERROR: Missing required OpenGL extensions,” set the environment variable force_s3tc_enable=true.

force_s3tc_enable=true ./start.sh

An alternative, more permanent solution consists of isntalling libtxc-dxtn-s2tc:

sudo apt install libtxc-dxtn-s2tc

Thanks to the game’s forum.

It’s quite simple. Open Settings → Window Manager → Keyboard. Then find the various “Tile window to the…” options. Finally, pick your desired keys.

You can’t make it function quite as smoothly as in Windows 10, but it certainly helps.

Of course you can also just drag the window against the side of the screen with the mouse. But sometimes the keyboard is faster.

Thanks to gnome-keyring you won’t get a useful error message. If you uninstall it, you’ll get the real culprit right where it matters, but in retrospect ssh-add gives you the same error message:

$ git pull upstream master 
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0644 for '/home/frans/.ssh/id_rsa' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
Load key "/home/frans/.ssh/id_rsa": bad permissions
git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

That means something like this, or maybe just read:

So much for the GitHub help. 🙂

It’s in the docs, but I’m always losing it. So here’s a quick overview of some of the ones that are more important to me.

Android version	API level
Android 8.1	27
Android 8.0	26
Android 6.0	23
Android 5.0	21
Android 4.1	16
Android 4.0.3, 4.0.4	15
Android 4.0, 4.0.1, 4.0.2	14
Android 2.3	9

https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels

Half a decade ago I neglected to jot this down, so I had to figure it out again. Just in case someone landed here searching for the most basic R problem, you start the program using uppercase R, not lowercase r. Anyway, to work with a package in a git repository or some such the easiest method is the devtools package.

install.packages('devtools')
library(devtools)
load_all()

Without any parameters, the load_all() function from devtools loads the current directory without installing. You could effect the same with more keystrokes using load_all('./'), and of course you can pass any path instead of relying on the current working directory. But in combination with git I find it easiest to just stick with that. After you’ve made some changes in the source, just run load_all() again.

Wait, what? You heard me. On Windows you can set sample rates per sound card. It looks like this.

In PulseAudio you’re limited to a primary and secondary sample rate. I’ve actually been using pasuspender more, also because its AC3 passthrough never seemed to work.

I have plenty of RAM and a UHD monitor, but Evince sees it fit to limit zoom to under 200% in many a newspaper-sized document.

# get current cache size (defaults to 50?)
$ gsettings get org.gnome.Evince page-cache-size
uint32 50
# set it to something more reasonable like 500
$ gsettings set org.gnome.Evince page-cache-size 500

In smaller documents this makes pretty much the entire document exist in RAM, which eliminates loading nonsense while going back and forth in a document. Overall, a much smoother experience.

I understand the reason for the hard-coded default limit, but I have to wonder if there isn’t a more dynamic way of handling this. Say, either 50 MB or 2% of total memory.

Thunar is one of the best graphical file managers I’ve used, and I say that even while I own a Directory Opus license for Windows. I have some minor quibbles like very sparsely populated default actions on files and folders, but the biggest flaw is doubtless that the breadcrumb navigation doesn’t feature all of the regular folder interactions. In any case, in this blog post I intend to show how I improve on both Thunar and GNOME Search in one fell swoop.

I’ll start with a screenshot of the desired end result. You right click on a folder, and you’re presented with the option to search for files in it.

In order to add this custom action, you’ll have to configure custom actions.

Then you click + to add a new one, or you can edit an existing action.

You can type the name that will show up in the context menu, a little description for yourself, choose a fancy icon, and under appearance conditions you can choose whether this custom action applies to a specific type of files or folders. Unfortunately this dialog can’t be resized, but since you can copy and paste it’s not too bad.

gnome-search-tool --path=%f --contains=

Finally, here is the result. Note that since I started gnome-search-tool with --contains=, the option to search for files containing specific text will show by default.

You can perform similar tricks with any of these other options.

$ gnome-search-tool --help
Usage:
  gnome-search-tool [OPTION...] - the GNOME Search Tool

Help Options:
  -h, --help                      Show help options
  --help-all                      Show all help options
  --help-gtk                      Show GTK+ Options
  --help-sm-client                Show session management options

Application Options:
  --version                       Show version of the application
  --named=STRING                  Set the text of "Name contains" search option
  --path=PATH                     Set the tet of "Look in folder" search option
  --sortby=VALUE                  Sort files by one of the following: name, folder, size, type, or date
  --descending                    Set sort order to descending, the default is ascending
  --start                         Automatically start a search
  --contains=STRING               Select and set the "Contains the text" search option
  --mtimeless=DAYS                Select and set the "Date modified less than" search option
  --mtimemore=DAYS                Select and set the "Date modified more than" search option
  --sizemore=KILOBYTES            Select and set the "Size at least" search option
  --sizeless=KILOBYTES            Select and set the "Size at most" search option
  --empty                         Select the "File is empty" search option
  --user=USER                     Select and set the "Owned by user" search option
  --group=GROUP                   Select and set the "Owned by group" search option
  --nouser                        Select the "Owner is unrecognized" search option
  --notnamed=STRING               Select and set the "Name does not contain" search option
  --regex=PATTERN                 Select and set the "Name matches regular expression" search option
  --hidden                        Select the "Show hidden and backup files" search option
  --follow                        Select the "Follow symbolic links" search option
  --mounts                        Select the "Exclude other filesystems" search option
  --display=DISPLAY               X display to use

Also see Finding Files on the Ubuntu wiki.

As another addendum to my notes on image optimization, here is how to cut a piece of audio or video as losslessly as possible with just ffmpeg on the commandline.

In this example we want the piece of audio from 1:30 to 2:00.

fmpeg -ss "1:30" -i audio-full.m4a -c copy -t "2:00" audio-cut.m4a