CODEWITHSUNDEEP
linuxbashshellunixcommand
Pranav S V
Pranav S V

Reputation: 9

Is it necessary to use '1>' while redirecting standard output in linux terminal?

Is it necessary to use 1> while redirecting standard output stream in Linux terminal? Here is the image..

This command is also working without using 1 while redirecting stdout in Linux. So my question is what is the difference between using and not using 1 while redirecting Standard Output in Linux terminal?

I tried with and without using 1 while redirecting Standard output stream in Linux. I got what I want all the time. But I need to know the difference between using and not using 1 while redirecting Standard output stream in Linux terminal.

Upvotes: 0

Views: 74

Answers (1)

tripleee
tripleee

Reputation: 189297

It is not necessary; the number is optional because it defaults to 1 when you omit it.

The general syntax is n> where n is the number of an open file descriptor. You can open new file descriptors e.g. with exec (so exec 3>&1 duplicates file descriptor 1 to file descriptor 3) or you can inherit open file descriptors from a parent process.

By default, the shell gives you standard input on file descriptor 0, standard output on 1, and standard error on 2, all connected to your terminal.

Upvotes: 2

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