The use of the echo command for Linux __linux

The echo command of Linux, which is very commonly used in shell programming, is often used when printing variable value under a terminal, so it is necessary to understand the use of the following Echo

The function of the echo command is to display a piece of text on the monitor, which generally acts as a hint.

The general format for this command is: Echo [-n] String

where option n means that the output text does not wrap, and the string can be enclosed in quotes or without quotes. Output a quoted string with the Echo command, outputting the string as it is, and using the echo command to output a string without quotes, each word in the string is output as a string, separated by a space between the strings.

Function Description: Display text.

Syntax: Echo [-ne][string] or echo [--help][--version]

Supplemental Note: Echo will send the input string to standard output. The output string is separated by a white space character and the last line number is added.

Parameters:-n do not wrap at the last line

-E If the following characters appear in the string, it is handled in particular, not as a general

Text output:

\a issued a warning sound;

\b Deletes the previous character;

\c finally does not add line symbol;

\f the line but the cursor still stays in the original position;

\ n Wraps and the cursor moves to the beginning of the line;

\ r The cursor moves to the beginning of the line, but does not wrap;

\ t Insert tab;

\v and \f are the same;

\ \ insert \ character;

\NNN inserts the ASCII character represented by the NNN (octal);

–HELP Display Help

–version Display version Information