May 4, 2011 · Recently, I had to shut up powershell on a Linux host, this wasn't that obvious to figure out. After back and forth I found out that wrapping a command in $( ) and adding a explicit redirection after the wrapper works.

May 25, 2019 · /dev/null is the null device it takes any input you want and throws it away. It can be used to suppress any output. 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.

Jul 10, 2014 · The first part > /dev/null redirects the stdout, that is curl's output to /dev/null (more on this ahead) and 2>&1 redirects the stderr to the stdout (which was just redirected to /dev/null so everything will be sent to /dev/null). The left side of 2>&1 tells you what will be redirected, and the right side tells you where to. The & is used on ...

May 9, 2012 · instead of using >/dev/null 2>&1 Could you use : wget -O /dev/null -o /dev/null example.com what i can see on the other forum it says. "Here -O sends the downloaded file to /dev/null and -o logs to /dev/null instead of stderr.

Feb 22, 2012 · You probably want >/dev/null 2>&1. 1 In the context of a file redirect -- when it is the next token immediately after a > or < . In other contexts it means something else.

In Windows, nul is a null device, which means the output is just flushed and you don't see it. Thus, in this case, all output is being flushed. Thus, in this case, all output is being flushed. – lurker

@dbr cmd 2>&1 >>file does not redirect stderr to the file, but cmd >> file 2>&1 does. Order matters. In the first case, stderr is redirected to the stdout of the shell (possibly a tty if the command is entered interactively), and then stdout is directed to the file.

Oct 25, 2013 · Also: 1>nul 2>nul ping /n 2 ::1 is the equivilant of "ping -n 2 -w 1000 127.1 >nul" but stupidly harder to understand. Also: %~1 means to get the 1st arg %1 and trim quotes (if any) I could go on and on but you should just research it yourself.

A constant expression of type int with the value 0, or an expression of this type, cast to type void * is a null pointer constant, which if converted to a pointer becomes a null pointer. It is guaranteed by the standard to compare unequal to any pointer to any object or function. NULL is a macro, defined in as a null pointer constant.

Jun 8, 2013 · I'm reading up on redirecting data to /dev/null and so I tried a simple test: ping a.b.c # which results in an address not found If I try this: ping a.b.c &gt; /dev/null # prints the same error