Use the true command of linux to redirect and empty the contents of the file

This article mainly introduces the use of linux true command redirect empty file content, the article is very detailed, has a certain reference value, interested friends must read it!

The purpose of the true command is to purge the contents of a file without deleting it.

In some shell and bash, true is a built-in command, and only set the exit code to 0.

Syntax format: true [file]

Reference example

Clear the contents of the specified file:

[root@linuxcool ~] # true > linuxcool.log

True under bush is a command demonstration:

[root@linuxcool ~] # type-a truetrue is a shell builtintrue is / bin/true

Output a return value:

[root@linuxcool ~] # true; echo $? 0 or more is redirected to empty all the contents of the file using linux's true command. Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!