Bash dev null

Bash dev null is a commonly used term in Linux system programming. It refers to the null device file (/dev/null). The term is used to redirect the output of a command or a script to the null device file, which is a special file that discards all the output written to it.

Using bash dev null

To use bash dev null, simply redirect the output of a command or a script using the > operator followed by the null device file. For example:

$ command > /dev/null

In the above command, the output of the command will be redirected to /dev/null and discarded.

This is commonly used when you do not want to see any output on the screen or when you want to suppress errors or informational messages.

Example: Redirecting stdout and stderr to bash dev null

Here's an example of how to redirect both stdout and stderr to bash dev null:

$ command > /dev/null 2>&1

In the above command, the 2>&1 part redirects stderr to stdout, which is then redirected to the null device file.

Conclusion

Bash dev null is a powerful tool that programmers use to discard output from a command or a script. It is particularly useful when you want to suppress output you do not care about or when you want to make your scripts less verbose.