What does >/dev null do?
/dev/null in Linux is a null device file. This will discard anything written to it, and will return EOF on reading. This is a command-line hack that acts as a vacuum, that sucks anything thrown to it. Let's take a look at understanding what it means, and what we can do with this file.
What is 1 >/ dev null?
1. >> /dev/null redirects standard output ( stdout ) to /dev/null , which discards it.
What means 2 >/ dev null?
The intent with 2>/dev/null is to hide errors produced by grep by redirect any diagnostic messages to /dev/null (a special device file that discards the data written to it). The /etc/passwd file is generally readable by all users, so I don't quite understand why redirecting the error stream is needed.
What is find f 2 >/ dev null?
Specifying 2>/dev/null will filter out the errors so that they will not be output to your console. In more detail: 2 represents the error descriptor, which is where errors are written to. By default they are printed out on the console. /dev/null is the standard Linux device where you send output that you want ignored.
>/dev/null redirects the command standard output to the null device, which is a special device which discards the information written to it.
/dev/null — це файл віртуального пристрою, який при записі до нього все відправляє в порожнечу, а при читанні з нього зчитує нуль. Справжній потенціал /dev/null …
/dev/null – це нульовий пристрій, який відкидає будь-які дані, що на нього записуються. Однак, він повідомляє, що операція запису пройшла …