Everyone uses digital maps these days, I assume. At least I do. Since I’ve been using them more often lately, I checked if there are any apps for Linux and especially Ubuntu. The search returned 4 apps.
is a map application for GMONE. Its use is slick and fast. It is supposed to be simplistic
Search and directions is functional (based on MapQuest if I’m not mistaken) but geolocation isn’t. Moreover, the satellite imagery is not available at high resolution.
I recently faced a problem opening some JPG images that I have downloaded somewhere over the internet, probably Twitter. So I though I’d share the problem and the simple solution.
When I tried opening an image I got the following error
Error interpreting JPEG image file (Not a JPEG file: starts with 0x89 0x50)
As the error states I was trying to open an image with a JPEG extension but which was not actually a JPEG image. To further verify this and know the actually format I ran this command in the terminal:
file file_name.jpg
which will give you something like this:
PNG image data, 346 x 480, 8-bit/color RGB, non-interlaced
The solution was to imply replace .jpg or .jpeg with the appropriate format, .png in this case.
I can’t open .jpg files, what to do?, Ask Ubuntu
Why am I getting the error: “Not a JPEG file: starts with 0x89 0x50”, StackOverflow
The following is how I configured my R workspace (and Rstudio) and this was first shared on a Coursera’s “Getting and Cleaning Data” course forums.
First make sure that R is version 3+. If not update it according to this stackoverflow question.
Install Java (needed for rJava) first from a terminal:
sudo apt-get install openjdk-6-jre
which will install openjdk-6-jdk.
If this doesn’t work install all its packages:
sudo apt-get install openjdk-6-*
OR you might prefer openjdk-7-jdk
sudo apt-get install openjdk-7-*
You should find that it is installed using this command:
Here’s a couple of interesting videos I’ve watched recently:
If you liked this video, I suggest you read the book “Turing’s Cathedral”. Check the review.
cd ~/.config/
gedit redshift.config
;This is a configuration file for the screen color temperature adjuster Redshift.
;Copy this file to your ~/.config/ directory for redshift to use.
;All lines starting with a semicolon areignored (e.g, adjustment-method).
;To change your location, edit the lat & lon numbers. If these two lines are set to be ignored, redshift will fetch your location using the internet.
; Global settings
[redshift]
temp-day=5700
temp-night=3500
transition=1
gamma=0.8:0.7:0.8
location-provider=manual
;adjustment-method=
; The location provider and adjustment method settings are in their own sections.
[manual]
lat=-22.871114
lon=-43.202591
Thanks for reading
Ibrahim El Merehbi 