1. Some basic common
1) View the version of operating system
cat /proc/version
2) View the version of mainboard
cat /proc/cpuinfo
3) View the remaining space of the SD card.
df -h
4) View IP address
ifconfig
5)Condense：tar –zcvf filename.tar.gz dirname
Decompress：tar –zxvf filename.tar.gz
6) apt(Advanced Package Tool)is used to install software.
sudo apt-get install xxx install xxx software.
sudo apt-get update update software.
sudo apt-get upgrade Update the installed software.
sudo apt-get remove xxx remove xxx software.
Some tutorial for linux commands:http://www.runoob.com/linux/linux-command-manual.html
2. Introduction and configuration of the vim editor
Linux comes with editors nano and vi. Vim editor is an upgraded version of the vi editor,which has a better experience.
The following steps will teach you how to install and configure vim editor in the Raspberry Pi system
1)You need to input: sudo apt-get update
2)You need to input: sudo apt-get install vim
You will see the following interface:
3)You need to input: su and input the password for the your root account.
4)You need to input: sudo tar xvf vimconfig.tar.gz
5)You need to input: cd vimconfig
You need to input:./config.sh
You may see the interface shown below.
6)You need to input: touch /root/.vim /root/.vimrc
7)You need to input: apt-get install ctags
After the above steps is completed, the vim editor becomes will become as shown below.
The editor possess 3 modes:Enter mode, Command mode, Low line mode.
Enter mode:In this mode, you can enter characters, and pressing ESC will return to command mode.
Command mode: You can move the cursor, delete characters, and so on.
Low line mode: You can save files, exit editor, set editor, find,etc.(low line mode be regarded as in command mode)
①These instructions are used in Command mode:
vi filename/vim filename //Open the filename file
:w //Save file
:q //Exit editor(The file has not been modified)
:q! //Exit editor without save
:wq //Exit editor and save
②These instructions are used in Command mode.After these commands are executed, you can enter the Enter mode. (pressing ESC will return to command mode)
a //Add text to the right of the current cursor position
i //Add text to the left of the current cursor position
A //Add text at the end of the current line
I //Add text at the beginning of the current line (the beginning of a line that is not a null character)
O //Create a new line above the current line
o //Create a new line below the current line
R //Replace (overwrite) the current cursor position and several texts that follow
③These instructions are used in Command mode:
x //Delete current character
nx //Delete n characters from the cursor
dd //Delete current line
u //Undo the previous step
U //Undo all operations on the current line
④These instructions are used in Command mode:
yy //Copy the current line to the buffer
yw //Copy the characters from the cursor to the end of the word
y^ //Copy the content from the cursor to the beginning of the line
y$ //Copy the content from the cursor to the end of the line
p //Paste the contents of the clipboard behind the cursor
P //Paste the contents of the clipboard in front of the cursor
⑤These instructions are used in Command mode:
:set nu //Display the number of line
:set nonu //Undisplay the number of line