Shulou(Shulou.com)06/03 Report--

1. File name and its specification

1) File name length: segment file name system: 14 length: 512

2) available characters for file name: case, number, underscore (_), decimal point (.)

. The initial file is a hidden file

The suffix in the file name does not represent the file type

2 、 touch

1) format: touch 123

2) function:

(1) create a file (the file does not exist)

(2) modify the file access time (the file exists and is updated to the current time)

3 、 cp

1) cp source destination

2) function: copy files

3) option

-I: target file exists, request confirmation

-r: copy the directory to the new directory

Cp Source 1 Source 2 mesh (multiple sources, the destination must be a directory)

4 、 mv

1) mv source destination

2) function: move files, rename

3) description: the number of files remains unchanged

Mv 1.exe / home/npp/1.txt move and rename

5. Ln link file

1) ln file1 file2

2) establish a link

3) after the link, the link owner and permissions remain unchanged

6 、 cat

1) cat file1 file2

2) display the contents of the file: you can only see the last 23 lines

3) ctrl+s is suspended and ctrl+q resumes

4) will be locked by garbled codes.

7. More (pg)

1) display the contents of the file on a split screen

8 、 rm

1) rm file

2) Delete files

3) option

-I: give a confirmation before deletion

-r: delete the entire directory structure

-f: forcibly delete without prompting

9. Lp print file

1) lp file1

2) print

3) option

-d specify to print lp-d lp2 file1 on the printer

-m send an email notification to the user after the printing is completed

-n printed copies: lp-N2 file1

-s cancel the on-screen prompt

-t prints the specified title on the cover of the document

-w display the prompt message on the terminal after the printing is completed

4) lpstat: displays the print request and printer status in the printing system

5) cancel

Cancel printer3-1522 undo the printing of the specified request number

Cancel printer3 revokes all requests on the specified printer

6) pr file formatted output file

10. Cut cut the contents of the file

1)-f specify the location of the field

2)-c specify the location of the column

3)-d specifies the field delimiter. Default is tab.

Student1 tty03 Sep 04 08:36

Student2 tty06 Sep 04 09:36

Student3 tty02 Sep 04 10:36

Cut-F1 user_list displays all the contents of the file

Cut-d ""-f 1J 2 user_list displays the user name and terminal number

Cut-c 26-30 user_list display time

11. Paste connection file

1) paste

2)-d: specify the delimiter. Default: tabs

3) paste-d:file1 file2

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