linux[Basic]-07-text file operation [01]

Text File Editor commands

1. Cat: Used to view plain text files (shorter)

Format: Cat [Options] [file]

Parameters	Role
-N	Show line Numbers
-B	Show line numbers (blank lines are not shown)
-A	Displays the not visible " a symbol, such as a Space tab

1. MORE: For viewing plain text files (longer)

Format: more [options] [file]

Parameters	Role
- Digital	How many rows are displayed in advance
-D	Show message and error content

1. Head: Used to view the first n rows of a plain text file

Format: Head [options] [file]

Parameters	Role
-N	View Top N Line
-n-10	View all but do not show after Line

1. Tail: Used to view the following n lines of a plain text file

Format: tail [options] [file]

Parameters	Role
-N	show the post N of a file Line
-F	Refresh the displayed content continuously

Usage: Tail–n 3 last.txt is to view the following 3 lines of the Last.txt file

1. Od: For viewing files in special formats

Format: OD [options] [file]

Parameters	Role
-ta	Show default formatting
-tc	Show ASCII Coding
-to	Show octal
-td	Show decimal
-tx	Display hexadecimal
-tf	Show floating-point numbers

1. Tr: Used to convert characters in a text file

Format: TR [source character] [target character]

[Email protected] lab1]# more Tr.txt

A b c d e F g h i j k l m n o p q R S t u v w x y Z

[Email protected] lab1]# more Tr.txt |tr [A-z] [a-z]

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

1. Wc: The number of lines, characters, and bytes used to count text files

Format: WC [parametric] File

Parameters	Role
-L	Number of rows displayed
-W	Displays the number of characters
-C	Number of bytes displayed

linux[Basic]-07-text file operation [01]