UNIX for Dummies Questions & Answers

Right idea, wrong syntax. The order of redirections matter. The redirections have to come before the ampersand that terminates the command. You don't want both scripts writing dates to the same file or you won't know which dates came from which commands (assuming you used >> instead of >; using > may cause you to just get one date from one script and one date from the other script and you won't know which date came from either script).

The following probably does what you want:

Code:

nohup x1.sh 2>&1 >x1.out&
nohup x2.sh 2>&2 >x2.out&

Also note that in your scripts:

Code:

#!//bin/ksh

will use /bin/ksh to interpret the script on some systems and will try to use/ksh from a machine on your network with hostname bin on other systems. Use:

Code:

#!/bin/ksh

instead.

And, in both cases, I'm assuming that the 2nd line you show in the scripts:

Code:

x1.sh
 and
x2.sh

is the name of the file containing the other lines in the script; not a line of code to be executed.

Hi,

BTW, I tried as below

Create the following shell scripts.

data.ksh:

Code:

#!/bin/ksh

date
timex cp -pr /copy/data /db/devdb
date

index.ksh:

Code:

#!/bin/ksh

date
timex cp -pr /copy/index /db/devdb
date

Then I created a script called x.ksh as below:

Code:

#!/bin/ksh
nohup data.ksh  & 1>data.ksh.out  2>&1
nohup index.ksh & 1>index.ksh.out 2>&1

Then I run x.ksh
I am hoping to get some output from the .out file but I got nothing

I tried running the nohup manually from the command line. Same result, i.e. blank .out files.

Or do I simply have the first & in the wrong place

As I said before; you simply have every redirection and the ampersand in the wrong place. Try:

Code:

#!/bin/ksh
nohup data.ksh 2>&1 >data.ksh.out&
nohup index.ksh 2>&1 >index.ksh.out&

First, redirect the standard error output from the script to the same file descriptor that gets standard output from the script (2>&1). Then redirect the standard output from the script to a file for that script (>filename). Then run the command in the background (&).