Cat commands under linux connect files and print them to standard output devices

Preface

The cat command is used to connect files and print them to a standard output device (screen or > fileName to another file). The following article will describe this command in more detail.

Command classification: file management

Cat syntax format

Cat [parameter] [file name] cat [- AbeEnstTuv] [--help] [--version] fileName

Parameters.

-A,-- show-all is equivalent to-vET-b,-- number-nonblank for non-empty output line numbers-e is equivalent to-vE-E,-- show-ends displays $- n at the end of each line,-- number pairs for all output line numbers-s,-- squeeze-blank does not output multiline blank lines-t is equivalent to-vT-T,-- show-tabs displays jump characters as ^ Ilyu (ignored)-v -- show-nonprinting uses ^ and M-references Except for LFD and TAB-- help displays this help and leaves

Example

Display the entire file at once and add a line number

Cat-n config.js

Create a file from the keyboard (only files can be created, not edited)

Cat > newFile

Several files are merged into one file

Cat file1 file2 > newFile

Summary

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