How do I send all output to dev Null?
You can send output to /dev/null, by using command >/dev/null syntax. However, this will not work when command will use the standard error (FD # 2). So you need to modify >/dev/null as follows to redirect both output and errors to /dev/null.
What is dev Null in bash?
/dev/null is the bit-bucket: the place where you dump anything you don’t need. So, the STDOUT is redirected to the bit-bucket(trash) and the STDERR is redirected to where the STDOUT is located: the bit-bucket.
What does / dev / null mean in Bash?
What this means in simple terms: ignore error output from the command. For example, if kill cannot stop a process because it doesn’t exist, or because the current user doesn’t have the permission to do that, it would print messages on stderr. By redirecting stderr to /dev/null, you effectively suppress these messages.
How to send output to / dev / null?
You can send output to /dev/null, by using command >/dev/null syntax. However, this will not work when command will use the standard error (FD # 2). So you need to modify >/dev/null as follows to redirect both output and errors to /dev/null. Syntax to redirect error and output messages to /dev/null
How to redirect to / dev / null in shell script?
Enhancement 1 : You can replace 1> with just >. This is because 1 is the default stdout and you can ignore mentioning defaults. Enhancement 2 : You can replace the 2nd /dev/null with &1. This is because /dev/null is already pointed to by stdout 1.
What does the number mean in / dev / null?
By redirecting stderr to /dev/null, you effectively suppress these messages. A number in front of the > tells the shell which file descriptor to redirect into the file. If you leave the number off, it defaults to 1 – which is the same as standard output, stdout for short, which most commands write their output to.