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

This article focuses on "how to use Shell script echo instructions", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to use Shell script echo instructions.

Echo is an internal instruction of Shell that prints a specified string on the screen. Command format:

The code is as follows:

Echo arg

You can use echo for more complex output format control.

Show escape characters

The code is as follows:

Echo "\" It is a test\ ""

The result will be:

"It is a test"

Double quotation marks can also be omitted.

Display variable

The code is as follows:

Name= "OK"

Echo "$name It is a test"

The result will be:

OK It is a test

Double quotation marks can also be omitted.

If the variable is connected to other characters, use curly braces ({}):

The code is as follows:

Mouth=8

Echo "${mouth}-1-2009"

The result will be:

8-1-2009

Show line feeds

The code is as follows:

Echo "OK!\ n"

Echo "It is a test"

Output:

OK!

It is a test

Show no line wrapping

The code is as follows:

Echo "OK!\ c"

Echo "It is a test"

Output:

OK!It si a test

Display results directed to file

The code is as follows:

Echo "It is a test" > myfile

Output string as is

If you need to output the string as is (without escape), use single quotes. For example:

The code is as follows:

Echo'$name\ "'

Display the result of command execution

The code is as follows:

Echo `date`

The result will show the current date

As can be seen from the above, double quotes are optional, and single quotes are mainly used in the original output.

At this point, I believe you have a deeper understanding of "how to use Shell script echo instructions". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.