[SOLVED] re-direction into a file

Miles Anthes · 03-10-2016, 12:35 PM

Under MS-DOS, when requesting a directory callout (dir) [ls] the answer can be redirected from the screen into a file (dir a > file)and the resulting ls output will be in the file on the hard drive (or disk). What is the manner to do this in Linux?

suicidaleggroll · 03-10-2016, 12:38 PM

It's the same

Code:

ls a > file

rtmistler · 03-10-2016, 12:58 PM

Quote:

Originally Posted by suicidaleggroll

It's the same

Code:

ls a > file

Yes.

And I always have to look this up, but my $0.02 are that you also can get stderr piped to that file by changing it to:

Code:

ls a &> file

Now someone chime in and tell me that I looked it up wrong

suicidaleggroll · 03-10-2016, 01:01 PM

Yes that'll work. It's simply a shortcut for

Code:

ls a > file 2>&1

which redirects stdout to file and redirects stderr to stdout

hydrurga · 03-10-2016, 01:04 PM

Quote:

Originally Posted by rtmistler

You also can get stderr piped to that file by changing it to:

Code:

ls a &> file

As far as I am aware, that's not a portable solution (it's not in POSIX), but is accepted by many shells.

ls a > file - stdout (create new file)

ls a 1> file - stdout (create new file)

ls a >> file - stdout (append to existing file)

ls a 2> file - stderr

ls a >file 2>&1 - both stdout and stderr (as suicidaleggroll correctly points out)

If you want to silence either stream, redirect them to /dev/null