557
rated 0 times
[
557]
[
0]
/ answers: 1 / hits: 680722
/ 11 Months ago, wed, january 25, 2023, 5:01:54
I would like a brief explanation of the following command line:
grep -i 'abc' content 2>/dev/null
More From » command-line
I would like a brief explanation of the following command line:
grep -i 'abc' content 2>/dev/null
The >
operator redirects the output usually to a file but it can be to a device. You can also use >>
to append.
If you don't specify a number then the standard output stream is assumed, but you can also redirect errors:
> file
redirects stdout to file
1> file
redirects stdout to file
2> file
redirects stderr to file
&> file
redirects stdout and stderr to file
> file 2>&1
redirects stdout and stderr to file
/dev/null
is the null device it takes any input you want and throws it away. It can be used to suppress any output.
Note that > file 2>&1
is an older syntax which still works, &> file
is neater, but would not have worked on older systems.