Shell Programming and Scripting

Hi All,

I am trying to redirect output for every line in a korn shell script that is going to generate output and append it to a log file.

I have been doing this after EACH and every line that is going to produce output:

command 1 >> test.log
command 2 >> test.log
command 3 >> test.log

I would like to have both stderr and stdout appended to the log, and I know there is some easier way doing this than this repeition for every line.

You can use group command { ...; } and append output to file:

Code:

{ command 1; command 2; command 3; } >> test.log

OR

Code:

{
  command 1
  command 2
  command 3 
} >> test.log

>> test.log 2>&1 to also redirect stderr.

Or, at the top line of the script:

Code:

exec 1>logfile

This will send every line that anything prints into standard ouptut, into the logfile.

There is always the option of simply calling the script with the redirection in place:

Code:

script.sh >>test.log 2>&1

Regards,
Alister

And to send both stdout and stderr to logfile for all commands in the script that don't otherwise redirect their output, you can use:

Code:

exec >logfile 2>&1

and, of course if you want to append to an existing logfile instead of overwriting it, you can use:

Code:

exec >>logfile 2>&1