Pi-Help

Raspberry-Pi : Help

Change your Desktop Environment 

$ sudo tasksel

  (Cinnamon resembles Windows, reboot for change to take effect)

To scan for WiFi networks, use the command

pi@raspberrypi: ~$ sudo iwlist wlan0 scan|grep "ESSID"

example output:

ESSID:"darkroom"

ESSID:"mynetwork"

ESSID:"bluetuna"

Dosbox keyboard messed up?

Happens when running Dosbox from a Pi started in CLI

$ sudo nano /home/pi/.dosbox/dosbox-0.74.conf

  usescancodes=false

Install software

If you're not sure what you're looking for or just wish to browse through what's available, you can alternatively use the CLI (Command Line Interface) tool Aptitude:

$ sudo apt

Then use apt-cache to search for the package that you want to install, in this case,

$ apt-cache search APPNAME

You can pipe the output to a text file for later reading

$ apt-cache search APPNAME > test.txt

Remove unwanted programs

$ sudo apt-get --purge remove APPNAME

   (minecraft-pi, claws-mail)

  or run aptitude by itself

If your Raspberry Pi just seems realy flakey.

Get a bigger power supply!

You think the SD card is corrupt? You would like to do a "Chkdisk"?

Force  the system to check the volumes on boot up

$ sudo touch /forcefsck

Then reboot

(better!! add "touch /forcefsck" to /etc/rc.local (before "exit 0")

  to check file system at every boot!)

Network Wha???

Route               View IP route table

iwconfig            View Wireless devices

ifconfig            View IP info of all interfaces

Using Google Chrome with Secure SSH to access the Pi

and you see this....

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@                                              @

@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @

@                                              @

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

in Google Chrome - "Ctrl+Shift+J"

make sure "Console" is highlighted on the menu bar, paste the following and try again

term_.command.removeAllKnownHosts();

I thought I saw something during boot up

~ $ dmesg    (view the boot logs, scroll back if needed)

I see a prompt - but where am i in the directory tree?

$ pwd              Print Working Directory

$ arch             Display hardware architecture

$ sudo nano filename   edit text file on the screen

$ ls               List files

$ cd directory     Change to directory

$ cd ..            Change directory up(back) one level

$ mkdir directory  Make directory

$ clear            clear screen

$ more filename    display text file on the screen

$ head filename   \

    or   display the first or last 10 lines of a file

$ tail filename   /

$ sudo mv filename directory

  move a file to a different directory

$ cp filename newfile   new copy (duplicate a file)

$ rm filename     remove (delete) filename (might need sudo)

$ touch filename Create filename

$ man command     an interface to the on-line reference manuals

                        (try $ man man )

$ alias           used to set up alternative names for commands

                      $ alias up='cd ..'

$ Help           for a command list

If it seems an installation is missing stuff,

  append      --fix-missing to the apt-get command

$ sudo apt-get install xbmc --fix-missing

Been adding & removing left & right?

Probably have snippets and parts of apps here and there?

Remove dead unconnected packages..

$ sudo apt-get autoremove

What kind of CPU do I have?

$ cat /proc/cpuinfo

$ cat /proc/meminfo    displays details about the Raspberry Pi’s memory

$ cat /proc/partitions reveals the partitions on your SD card or HDD

$ cat /proc/version    shows you which version of the Pi you are using.

$ vcgencmd measure_temp  CPU temperature

$ vcgencmd commands      for the list

If you get message during an installation similar to

  Failed to fetch http://mirrordirector.raspbian.org/

Check the file /etc/resolv.conf

and make sure you have an entry to an outside DNS provider like google

nameserver 8.8.8.8