Linux file Management system-file operations

To create a file:

Touch

• Role

Modifies the file timestamp. If the file does not exist, a new file is created.

Access time: Read the contents of this file once, this time will be updated.

Modification time: The last time the file content was modified.

Change time: The last time the Inode node of the file was modified.

• Options

-C: Do not create a new file.

--no-create: Do not create a new file.

-a:access, modify the file access time.

-m:modify, modify the file modification time.

-T: Modifies the specified time at the specified time (in the format [[CC]YY]MMDDHHMM[.SS]).

Touch–t 201409132040–m Test

• Parameters

File name to be modified.

Install

• Role

Copy the file and set its properties.

• Options

-D: Create a directory.

Rm:remove

• Role

Delete the file.

• Options

-i:interactive, Interactive.

-f:force, force Delete.

-r:recursive, recursive delete.

• Parameters

The file name to be deleted.

Cp:copy

• Role

Copy files and directories. Copy one file to another file or copy multiple files to another directory.

• Options

-R:

-R:

--recursive:

Recursive replication.

-F:

--force:

Forced replication overwrites the source file.

-I: interactive operation.

-A: Archive replication, often used for backups.

-P: Copies files as originally defined (permission information, ownership information, timestamp).

-L: Establish a hard link for the file.

-D: Copy as Symbolic link.

-P:

--no-dereference:

Copy as Soft link.

-L:

--deference

Copy to file.

• Parameters

The name of the file to be copied.

Mv:move

• Role

Move or rename the file.

• Options

-F:

--force:

Forces the file to move.

• Parameters

The file name to be moved.

Stat:state

• Role

View information such as file or file system status.

• Options

-C: Displays file information in the specified format.

--format: Displays file information in the specified format.

• Parameters

File information to view.

File

• Role

View the file content type.

• Parameters

The name of the file to view.

Cat:concatenate

• Role

Connect and display the file. When the file is connected, the results are all output. It is not recommended to use this command if the content is too long.

• Options

-N: Displays the line number.

-E: Displays the line terminator $.

-T: Displays tabs.

-V: Displays additional nonprinting characters.

• Parameters

File name to be merged.

Tac

• Role

Displays the file information in reverse, starting at the last line.

• Shortcut keys

Shift+pgup/pgdown: Command line display page.

CTRL + C: Abort command execution, start command input from new.

• Parameters

The name of the file to view.

More

• Role

Page view file information, support page backward. Shortcut keys are basically the same as man, and do not support K shortcuts. When you turn to the last page, you exit.

• Parameters

The name of the file to view.

Less

• Role

is basically the same as man's usage.

• Parameters

The name of the file to view.

Head

• Role

Displays the contents of the front row of the file.

• Options

-N: The number of rows displayed, which defaults to 10.

• Parameters

The name of the file to view.

Tail

• Role

Displays the number of rows following the file.

• Options

-N: The number of rows displayed, which defaults to 10.

-F: Monitor file contents. Look at the end of the file, do not exit, wait for the new content appended to this file to be displayed later.

• Parameters

The name of the file to view.

Linux file Management system-file operations