May 2016
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How to Disable, Stop or Uninstall Apport Error Reporting

Apport is an Error Reporting Service provided by Ubuntu to intercept and analyze crashes and bugs as and when they occur. Crashes and Bugs may sound like bad things, but actually most operating systems will have several a day, and it doesn’t mean your computer is broken, nor does it necessarily stop working. As such, Apport can usually be safely disabled, as it doesn’t fix anything, it just tells developers that something went wrong.

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How do I reset a lost administrative password?

By default the first user’s account is an administrative account, so if the UI is prompting you for a password it’s probably that person’s user password. If the user doesn’t remember their password you need to reset it. To do this you need to boot into recovery mode.

Boot up the machine, and after the BIOS screen, hold down the left Shift key. You will then be prompted by a menu that looks something like this:

enter image description here

I’ve noticed on some systems that timing when to hit the left Shift key can be tricky, sometimes I miss it and need to try it again.

Hit the down arrow until you select the 2nd entry from the top (the one with the recovery mode in the description) and then hit Enter. Continue reading How do I reset a lost administrative password?

How can I test SD card speed?

To obtain the results , type the following lines at a command prompt

The dd command is the Linux block copy command. It reads from the if= file, in the first case a block of zeros, and writes to the of= file, in the first case the file named test.tmp in your HOME directory (the ~/ means your HOME directory). The bs= gives the size of the data, and the count= gives the number of times this is repeated. sync ensures that the filesystem cache is flushed to have more realistic data. Please run it multiple times, one sample is not scientific enough.

Write speed

sync; dd if=/dev/zero of=~/test.tmp bs=500K count=1024

Read speed

sync; echo 3 | sudo tee /proc/sys/vm/drop_caches
sync; time dd if=~/test.tmp of=/dev/null bs=500K count=1024

Delete the temporary file

rm ~/test.tmp

Source :

How To Set Up SSH Keys

Generating RSA Keys

The first step involves creating a set of RSA keys for use in authentication.

This should be done on the client.

To create your public and private SSH keys on the command-line:

mkdir ~/.ssh
chmod 700 ~/.ssh
ssh-keygen -t rsa

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Kodi 15.1 Debian package for Raspbian on RPi 2

This kodi package is an all in one package, that combines kodi and kodi.bin. To avoid conflicts with older versions from any repository these are deinstalled first.
To get and install kodi 15, run the following from a terminal or the command line:

tar -xzf kodi-15.tar.gz
cd kodi-15
sudo ./install

Continue reading Kodi 15.1 Debian package for Raspbian on RPi 2