Linux! NULL Command (:)
Ever wondered about the mysterious colon in Bash? It's actually a powerful command called the null command and is often referred to as the no operation command. It is a built-in shell command that essentially does nothing and always returns a successful exit status zero. Despite doing "nothing," it has various practical uses in shell scripting and command-line operations.
Common usage are as follows:
Placeholder in functions, loops and conditionals
Initializing variables to the empty
Creating empty files
Infinite loop
As a function name
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