Master Information Platform : Linux is a free to use and free dissemination of Unix-like operating system, it is based on POSIX and Unix multi-user, multi-tasking, multi-threading and multi-CPU support for the operating system. It can run major Unix tools, applications, and network protocols. It supports 32-bit and 64-bit hardware. Linux has inherited the Unix design idea to the network as the core, is a stable performance multi-user network operating system.
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And a command option
command: input in the command line, it is called instruction.
If the input command appeared in command not found // command not found
a complete instruction standard format: Linux common format # directive body [options] [Operation Object] [] representation can not happen
☆ a directive can contain multiple options
☆ operating object can be more
example: let Xue Bin domain downstairs canteen to buy a bottle to help the farmer spring breeze and napkins
in this directive
command topic: shopping operation object: to buy water and napkins options: Nongfu spring and breeze
two basic instruction.
1.ls command
meaning: ls (list) uppercase lowercase li lI
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usage 1: #ls meaning: lists all files in the current working directory / file the name of the folder
usage 2: #ls path meaning: lists all files in the specified path name / folder
on a path (important):
relative path: relative first have a reference (in general is the current working directory);
wording : './' represents the current directory '... /' indicates a directory on
the absolute path: no reference from the root "/" corresponding to a direct path to start looking #ls / path
usage 3 : #Ls options path
meaning: file listed in the path / folder name, and displays the specified format
# ls-l path
# ls-la route
options explained
-l: representation list, expressed as a detailed list of form on display
-a: displays all files / folders (including hidden) all the hidden files are based on point (*) at the beginning
The first column represents the document type character "-" indicates that the document file type "d" indicates that the document is a folder
1
Usage 4: # ls-lh path
meaning: lists all files in the specified path name / folder to form of a list and displayed in the form of a high readability of the display size of the document when
2.pwd instruction
usage: #pwd (print working directory) to print the current working directory
3.cd command
#cd change the current working directory is used to switch directory
syntax: #cd path
added: there is a special symbol "~" in linux, it represents the current user's home directory.
The switchover: # cd ~
4.mkdir instruction
means creating a directory
#mkdir path
Note: Results Color Description ls lists, where blue represents the name of the folder, the file indicates black, green its authority to have all privileges .
Here today to fight another day tomorrow.
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Original link: https: //blog.csdn.net/weixin_45488131/article/details/103245971