UTF8, base64 and other encoding conversion
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encoding conversion (Photo credit: Wikipedia)[/caption]
A common way to represent binary files in ascii-only diplay is to use base64. This is also done a piece of software does not handle unicode: it manipulate its base64 representation.
6YCZ5YCL57ay56uZ5piv576O6bqX55qECg== and dGhpcyB3ZWJzaXRlIGlzIGJlYXV0aWZ1bAo=
- to text/unicode:
echo '6YCZ5YCL57ay56uZ5piv576O6bqX55qECg==' | base64 -d
echo 'dGhpcyB3ZWJzaXRlIGlzIGJlYXV0aWZ1bAo=' | base64 -d
- to text/unicode:
echo '6YCZ5YCL57ay56uZ5piv576O6bqX55qECg==' | base64 -d | xxd -p -i | sed -e's/, //g'
echo 'dGhpcyB3ZWJzaXRlIGlzIGJlYXV0aWZ1bAo=' | base64 -d | xxd -p -i | sed -e's/, //g'
- from hex:
echo 'e98099e5808be7b6b2e7ab99e698afe7be8ee9ba97e79a840a' | xxd -p -r
- mix hex and ascii to ascii:
echo -e 'this\x20website\x20is\x20bueatiful'
loop devices
Loop devices are used to acces any file as if it were a block
device such as a disk. On
GNU/linux, the canonical command to interact with loop devices is
losetup . To list the next
usable loop device :
losetup -f
disk image loop mount …
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udev, systemd, laptop, power management and backlight brightness
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Laptop problem (Photo credit: Wikipedia)[/caption]
My two problems with my laptop are the following:
- I want to control the backlight brihtness of my screen even if I don't start the graphical desktop (i.e. work with tty)
- I want to be …
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berry pie cooked with rasp: init
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Rasp (Photo credit: Wikipedia)[/caption]
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berry pie. (Photo credit: Wikipedia)[/caption]
I just bought the second cheapest computer in the world in 2014 (the cheapest being the raspberry pi model A). Here is my little experience with it …
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chroot pre/post requests
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changed roots (Photo credit: Wikipedia)[/caption]
The chroot command is quite simple but I almost always forget all the prerequest and post-chroot checks that should be done to have a fully operational chrooted environment.
The, chroot operation consist in changing the apparent root of …
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yacy installation
I have some troubleshoot installing one of my prefered web search
engine yacy . My
best advise would be to install in on a debian running computer. The
package is OK, the default configuration run well, and you just start is
as every other service
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One year onto an arch
Arch bridge (Photo credit: Wikipedia)
About one year ago, I decided to test
archlinux. Now, I think I made my mind about it.
I must precise that I previously used
Debian, and even previously I used
ubuntu. I migrated from ubuntu to debian in 2008 because it was too automated …
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encoding conversion (Photo credit: Wikipedia)[/caption]
