Linux Directory and file management

Directory Management

1.mkdir Create empty directory

-P automatically creates a path directory when the path does not exist when creating the directory

-V Details to display the creation process

Create multiple /a/b/{c,d/e} curly braces at the same time expand

{A,b}_{c,d} = = A_c, A_d, B_d, B_c

2.Tree View file or directory number

3.rmdir Delete empty directory

-P

4.Touch Modify file timestamp

Created when the file does not exist

-C does not create any files

-A Change access time

-M Change modification time

-T specify time

Touch a B builds two files a and b

Touch ' a B ' Create a file of a b

Generally do not use a space for the file name made

5.stat view file information

6. Creating a file can also use a text editor

Nano

Ctrl+o Save

Ctrl+x Exit

7. RM Delete file

-I interaction

Administrator default -i command alias

\RM using the command itself, without using aliases

-F reject prompt

-R Delete Directories recursively delete all files under directory and directory

File Management

1. cp file copy

-R Recursive copy directory

-F forced override

-P Save the original group permissions and timestamp of the file (not specified who copied the file belongs to WHO)

-P Keep the link

-L Copy the file that the link points to

-A archive replication

2.mv moving files

3. Install copy file

4. file Content type View

To view text:

Cat, TAC, more, less, head, tail

5.Cat

-N Display line number

-e display line terminator

the line terminator for the Linux text file is $

the line terminator of the Window file is $ plus carriage return

6.theTAC Displays the text in turn

7.Ctrl + C termination signal

8,shift+page up turn graphic shift+page down graphic

9, more single screen query file

Ten, less like man . View text, forward and backward, find and more

One,head can see the first few lines ( no option default )

Tail can view the following lines ( no option default )

-F do not exit wait for display text up to date append content

Text Processing:

Cut, join, SED, awk,

Cut

-D Specify delimiter (default is a space)

- f Specifies the number of fields 1,3 1 and 3 fields 1-3 1 to 3 A field

Example:cut-d:-f1/etc/passwd

text sort: sort Simply sorts the display without affecting the contents of the source file

Sort by default by Ascoll code
-N Sort by numeric size

-R Reverse

-T field delimiter

-K to make the first few fields prevail

-U Remove Duplicates

-F ignores case

Example:sort-t:-k3-n/etc/passwd

uniq adjacent repeating rows

Remove duplicate rows By default

-D Show duplicate rows

-C shows the number of repetitions per line

text Statistics WC (word count)

Show sequential number of lines Word book bytes

-L Display number of rows

-W display number of words

-M display number of characters

-L the longest line contains the number of characters

+tr replacement and deletion

TR AB-AB

TR A-Z A-B lowercase are converted to size

-D Delete all characters in the character set

tr-d ' AB '

File name wildcard

*: Any number of characters

? : an arbitrary character

[]: Any single letter in the specified range

[^]: Specifies any single character other than this range

[: Space:]: white space character

[:p Unot:]: punctuation

[: Lower:]: lowercase letters

[: Upper:]: size Letter

[: Alpha:]: uppercase and lowercase letters

[:d igit:]: number

[: Alnum:]: numbers and uppercase and lowercase letters

Man 7 glob view all wildcard characters

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Linux Directory and file management