Raspberry Pi Linux Shell

The LS command is used to display which files and folders are in the directory

Ls

Blue indicates folder White is file

Ls-r List the contents of all folders (R = recursive)

Ls-l View details including file permissions last modified time size (L for long)

Ls-a Viewing hidden files

-t sort by file last modified date

-s sort by file size

-R Reverses the result (-r-r meaning is completely different)

-H (human-readable human readable) is to convert file size to KB MB GB without calculation

File to view the type of a document

File

such as picture size type video audio information and so on

To switch directories:

[Email protected]:~ $ cd desktop/[email protected]:

File permissions

file type	owner	owning user group	other users
-	Rwx	r--	r--

File types have normal file (-) and directory (d)

Three different permissions for users

Readable r: Open file or use LS to view permissions under Directory

Writable W: Modify the contents of the file, create permission to delete the file

Executable x: Permission to run a file as a program or to enter a directory with a CD

(A directory only has the Execute permission to enter the read and write if it is not executed into the not go)

To change the file permissions of the relevant directives:

chmod     #修改权限 chown    #修改文件所属者 chgrp    #修改文件所属组

Quick Input Instructions:

/bo        /boot/

Command run output can be output as file redirection symbol (>)

ls >./ls. txt

You can see the Ls.txt file in the current directory.

#也可以做一个计算 then output to A.txt Echo $ ((5*5)) > A.txt

You can also output the current time and date to a file

Two >> means append text

Create a Directory

mkdir work    #创建一个目录 mkdir qwq College games    #创建多个目录

Create a directory you can use-V to see what happens when the command executes

mkdir -v testmkdir"test"

If you want to create a multi-level directory, use the-p option

mkdir -vp work/writing/booksmkdir"work"mkdir"  work/writing"mkdir"work/writing/books "

Delete File rm

RM -Option "file name"

As with mkdir, the-v option shows what happened when it was executed (what file was deleted)

#删除多个文件 rm file1 file2 file3

#使用通配符 Delete multiple files ? represents a single character * representing multiple characters [...] Denotes any character in parentheses [^...] In addition to the characters in parentheses [a-z]a to Z-range characters [0-9]0-9 of the number RM *. jpg # Delete all files in jpg format # delete img_8474.jpg  img_8475.jpg  img_8476.jpgrm img_*. jpg   RM Img_????. Jpg

Delete Directory

rmdir Book

If you want to delete a directory (and all of the contents) you need to add-RF option

RM -RF Books

copying and deleting files

CP copy_from copy_to    #复制 mv oldname newname      #移动

Update cache

sudo apt-get update

Find Packages

sudo apt-Cache Search game# If the search results are too long you can browse sudo less with less

Raspberry Pi Linux Shell