Linux Beginner's Note four: The Linux file Management class command is detailed! (Video serial number: 03_1)

Commands to learn in this section:Cat (TAC), More,less,head,tail,cut,sort,uniq,wc,tr

Skills learned in this section: Directory Management

File Management

Date Time

View text

Split screen Display

Text Processing

Summary of File management commands:

Directory Management :

LS, CD, pwd, mkdir, rmdir, tree

File Management :

Touch, stat, file, RM, CP, MV, Nano

Date Time :

Date, clock, Hwclock, Cal

To view text :

Cat, TAC, more, less, head, tail

　　Cat: Connect and display

-N: Numbering each line when displayed

-E: Displays the line terminator for each line

(TheTAC command displays the text in turn)

split screen display :

More, less

　　MORE: Support Backward, (disadvantage: Turn to the end of the file to exit)

　　Less: Same as using the Man command (because the file is opened with less when using the man command)

　　head: View Top N rows ("n" defaults to 10)

　　tail: View after n rows

-N: Show first few lines

Tail-f: Look at the end of the file, do not exit, wait to display the subsequent append to this file new content;

Text Processing :

Cut, join, SED, awk

　　cut: Cut files

-D: Specifies the field delimiter, which is the default space

-F: Specify the fields to display

-F 1, 3: Show First and three fields

-F 1-3: Show first to third field

　　Sort: Text sort (default is sorted by ASCII code in ascending order)

-N: Sort by numeric size

-r: Sort by ASCII code descending

-T: Field delimiter

-K: Which field to sort the keywords for (sort-t:-K3/ETC/PASSWD)

-U: The same row is only displayed once after sorting

-F: Ignore character capitalization when sorting

　　uniq: report which row has duplicate content (adjacent)

-C: Shows the number of rows in a file that repeats

-D: Show only duplicate rows

　　WC (Word count): Text statistics (you can count how many lines, how many words, how many bytes in a file)

-L: Show only the number of rows

-W: Displays only the number of words

-c: Show only bytes of characters

-L: Shows how many characters are on the longest line

　　TR: Character processing commands (converting or deleting characters)

TR [OPTION] ... SET1 [SET2]

-D: Delete all characters that appear in the character set

Linux Beginner's Note four: The Linux file Management class command is detailed! (Video serial number: 03_1)