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What is /dev/null in Unix?

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Training Professional

/dev/null is the null file Is is a special file which contains nothing.

Linux Admin Trainer

/dev/null is a file. if we want to nullify something we can redirect the output to this file. Ex: find / -name linux >> /dev/null


Its a file which stands for the null file or if i comoare it with windows OS,we can call it as a permanently deleting the file by pressing Shift+del key .

Linux Administration Certification and UNIX Shell Scripting

It is a bit bucket in Unix where you dump things you don't need. When you need to discard output from your command , you can redirect it to /dev/null. In Unix, an external device is treated as a file. All such devices are found as files in /dev directory. It is a Null device . Suppose you need to...
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It is a bit bucket in Unix where you dump things you don't need. When you need to discard output from your command , you can redirect it to /dev/null. In Unix, an external device is treated as a file. All such devices are found as files in /dev directory. It is a Null device . Suppose you need to search for a pattern, but do not need it to be displayed to the console, but need the exit code of the command, we can do grep pattern filename > /dev/null # search without displaying it to console. echo $? # exit code You can also redirect your standard error messages from a command to /dev/null as $cmd 2> /dev/null Here 2> represents standard error. /dev/null is the bit-bucket: the place where you dump anything you don't need. /dev/null is a special file-system object that throws away everything written into it. Redirecting a stream into it means hiding an output. read less

IT Professional Trainer with 13 Years of Experience

its an black hole you can send any junk data.

Programming Tutor

it is used to dispose off unwanted files or devices in Unix. it is a special file, not a directory, therefore, one cannot use mv command to move files in /dev/null.

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