2>&-

[Jerome Salyers]

hi,

i have the info on 2>&1 but this 2>&- is unclear to me... could someone please explain this to me, and maybe, if possible, explain (or point to) other examples of redirecting?

thanks

jerome

[Trond Haugen]

There is no difference. Bothe '1' and '-' means standard out.

Regards,
Trond

[Robert-Jan Goossens · Accepted solution]

Hi Jerome,

Take a look at man remsh

example

remsh otherhost . .profile 2>&- \; command

The 2>&- throws away error messages generated by executing .profile when stdin and stdout are not a terminal.

Robert-Jan.

[Andreas Voss]

Hi,

if you use 2>&1 then stderr is redirected to stdout.

if you use 2>&- then stderr will be closed which means that no stderr messages will be written out.

You can read about this in the manual of ksh in the section Input/Output:

man ksh


Regads

[Trond Haugen]

Sorry Jerome but I was too quick. '2>&-' means that the standard error is closed.

Regards,
Trond

[Yogeeraj_1]

hi jerome,

concerning "other examples of redirecting"

Please note that there is also the "tee" which is often used..

E.g.
L-9iAS: d05/9iAS>who |tee -a yd.txt
deg pts/ta Jan 29 07:58
jeanfr pts/tb Jan 29 15:34
glenda pts/tc Jan 29 12:16
L-9iAS: d05/9iAS>more yd.txt
deg pts/ta Jan 29 07:58
jeanfr pts/tb Jan 29 15:34
glenda pts/tc Jan 29 12:16
L-9iAS: d05/9iAS>

Write a list of users to the screen and also append the list to the file yd.txt

see man tee

Hope this helps!
Regards