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meaning of &1

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# 1  
Old 03-04-2011
meaning of &1
All,
In the below mentioned line ---
Code:
$SCRIPT_FILES/wrapper_sleep.ksh > $MVXREFLOG 2>&1

what is the meaning of &1 here.


Regards
Oracle User
Last edited by Franklin52; 03-04-2011 at 03:05 AM.. Reason: Please use code tags
# 2  
Old 03-04-2011
0,1,2 are the file descriptor for STDIN, STDOUT and STDERR respectively.

0 -- STDIN - standard input , is by default keyboard.
1 -- STDOUT - standard output, is by default terminal
2 -- STDERR - standard error, is by default terminal

In your command, STDOUT is set to a file ( with redirection, 1 is optional here ) and STDERR is set to STDOUT ( wherever the STDOUT is set)

"&" is the syntax for that. So 2>&1 means standard error is being redirected to standard output which is finally set to a file. so both stdout and stderr will go to file.

just to make sure, its not $1
# 3  
Old 03-04-2011
thanks anchal.
Ohh yes! I typed it by misake.

Regards
Oracle User

Moderator's Comments:
Mod Comment Changed subject from "... $1" to "... &1"
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