Is there such a device on the PI?

[lerner]

A long time ago, on another machine:

If you wanted to do a command quietly, or weren't interested in output from a command, you would put

> NIL:
or
> NUL: at the end of the line.

This would send the results to either NIL or NUL.

What is the equivalent on the PI?

As I don't know what they are called, it is difficult to search for them in the forums.

[jbeale]

To avoid seeing the normal output you might try

Code: Select all

> /dev/null

or if you don't want to see any error messages either, you can redirect both stdout and stderr streams with

Code: Select all

> /dev/null 2>&1 

See also: http://askubuntu.com/questions/12098/wh ... sh-scripts

[lerner]

Thanks very much.

[jahboater]

Or

Code: Select all

&> /dev/null

(alternative for the very common >xxx 2>&1)

[scruss]

lerner, it might save you (and forum members) a bunch of time and questions if you read The Linux Command Line by William E. Shotts, Jr.. It's free online, or available as a regular book from No Starch Press.

Yeah, AmigaDOS was a bit like Unix. Not quite, though; it didn't have Unix's flat filesystem and device tree, but had separate devices like S: (≅ /etc), ENV: (where environment variables lived as files) and DH0. AmigaDOS also pretty much ignored case of file names; Linux doesn't.

If you want to run a command really quietly in the background and disconnect all IO from the current shell so you can exit it and keep the command running, you could do:

Code: Select all

nohup command 2>&1 > /dev/null &

[lerner]

Scruss,

Wow! Top marks for getting it was Amiga's Workbench. Not many people would remember that.

I was pretty good with that, but mine kinda died back in the late 90's.

Thanks too for the link. Shall get and read it.

I have a UNIX book somewhere, but with all the other books, it becomes "one of many" which I am reading.
And it is a bit dated: Like 1980's dated.

[scruss]

Wow! Top marks for getting it was Amiga's Workbench. Not many people would remember that.

Was a dedicated ARexx and Wshell user back in the day. Used to write for a bunch of Amiga magazines, too.

[lerner]

Yeah, memories.....

I was really starting to get the jist of AREXX and scripts on the Amiga, and it died.
I am sure had it been working, I would be a lot better with my programming skills, but alas it s not, so I shall try to not dwell too much on the "ifs" and try to concentrate on the here and now.

But, hey, its good to meet another Amiga follower.

[wildfire]

Yeah, memories.....
But, hey, its good to meet another Amiga follower.

You can add me to that list.

And my 1200 is still working :p