RASPBERRY PI LINUX LESSON: From 1st to 15th

 

Lesson1:  Intro

 

http://www.toptechboy.com/raspberry-pi/raspberry-pi-linux-lesson-1-introduction-to-the-pi/

 

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Lesson2: Formatting SD Card and Installing Operating System

 

1, insert sd card into adapter and then PC; use sdFormatter to clear the sd card

2, System download. https://raspberrypi.org/downloads/

Downloads NOOBS

move all files into SD card, and reinsert SD card into Rasp

 

3, Plug keyboard and mouse into USB mounts of Rasp, connect Rasp with a monitor, and start system with power on

4,Insatll

     

 

booting up

 

Enable boot to 

 

 

boot in console

 

 

reboot

 

 

 

user name pi

passwords raspberry

 

5, ready to start working

 

 

 6, shut down (kill it): sudo halt

 

 7, learn how to back up:

 win32 disk imager

 

 

 

         

 

 reinsert SD card to PC

create a new folder for backup

 

 

 

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Lesson3:  

 

1, where am I in file system?

 

 

 

 2, navigating:

 

ls

cd ..

cd python_games

 

 

 3, What's in the root? What's in some folder ?without navigating

 

ls /

 

 

ls /home/pi/python_games

 

 

 

 

 

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Lesson 4: Creating and Editing Files with Nano Command

 

1, operating folders : three types:

•  current,
• ".." for higher level
• /home/pi/??? for absolute path

 mkdir ????

rmdir ???

 

 

 

 

 

 

 

 2, operating files

 

nano ???.txt and type documents

 

 

 

 

 

 

 

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LESSON 5: Naming Files and Folders

 

 

don't use space in your file name!

 

Case-sensitive in Linux

 

• underline to replace spaces

 

• bumpy text: Use upper case first letter starting from the seconde words

 

 

•  Dash to replace spaces

 

 

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 LESSON 6: Moving, Copying and Deleting Files and Folders

 

 mv ??/xxx.txt  ss/xxx.txt

 mv ??/xxx.txt  ss/yyy.txt (rename at the same time)

 

 

 cp ??/xxx.txt ss (copy, so we don't need a new name)

 cp ??/xxx.txt  ss/yyy.txt (but we can still rename the file)

 

 

 in nano: ctrl+o and yes to save, and ctrl+x to leave

 

 

 delete one folder, we have to first remove all the files in it, BUUUUUUUT?

 

 

 But , we can still do it by add -r

 

 

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LESSON 7: Using the Wildcard

 

 

have several files here.

 

move all dog?.txt to another parallel folder

 

 

 move every file to another folder

 

 

 

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 LESSON 8: Sending Linux Command Output to Files

 

 

 

 one > will overwrite the content of the file

 

 

 double > will be write after the former content

 

 

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 LESSON 9: Using the Linux Sort Command

 

•  File1

 

sort the file

 

-r means reverse sort

sort and rewrite to other files

 

 

•  File2

 

 

without -n, linux doesnt know you want it to sort by number values

 

 

-n -r: number and reverse

 

 

•  File3

 

 

-M: means the month sort. Even tolerate a small typo...

 

 

 

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 LESSON 10: Safely Shutting Down the Raspberry Pi

 

 http://www.toptechboy.com/raspberry-pi/raspberry-pi-linux-lesson-10-properly-and-safely-shutting-down-the-raspberry-pi/

 

The simplest way to shutdown the pi is with the command:

$ sudo halt

Instead, if you want to shutdown and then reboot, you can use:

$ sudo reboot

These two commands will take care of things most of the time. If for some reason sudo halt does not work, you can try the following:

$ sudo shutdown -h now

 

 

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 LESSON 11: Fixing Problem with Keyboards in US

 

 

 make sure here's a lowercase "us"

 

 

 

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 LESSON 12: More on Linux Path Names

 

"/" means 

 

 

 

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 LESSON 13: Using the Linux Pipe Command

 

 

 

  

 

 

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 LESSON 14: Using Linux Tee Command

 

 print result using pipe,

we can write results to files with ">" and ">>"

but what if we would like to both screen print and write results to a file?

 

examine file content by "cat"

 

 

 

 

 

get them both!

 

 

another example:

 

 

 

but this operation will overwrite files, what if we want not to overwrite? APPEND!

 

    

 

 

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 LESSON 15: Using the Linux Find Command

 

 

find .　　　　　　-> 　　search current folder

-name　　　　　 ->　　search by name

"xxx.ttt"　　　　   ->　　

 

 

 search with wildcard under /home/pi/ : 

use "~"