dev-null – Tarik Billa

Will printf still have a cost even if I redirect output to /dev/null?

March 20, 2023 by Tarik

Pretty much. When you redirect the stdout of the program to /dev/null, any call to printf(3) will still evaluate all the arguments, and the string formatting process will still take place before calling write(2), which writes the full formatted string to the standard output of the process. It’s at the kernel level that the data … Read more

How can I redirect all output to /dev/null?

February 14, 2023 by Tarik

Redirection operators are evaluated left-to-right. You wrongly put 2>&1 first, which points 2 to the same place, as 1 currently is pointed to which is the local terminal screen, because you have not redirected 1 yet. You need to do either of the following: 2>/dev/null 1>/dev/null google-chrome & Or 2>/dev/null 1>&2 google-chrome & The placement … Read more