Always "Excution failed" to run "httpd".

[blp330]

Hi,

I am trying to use monit to run /usr/sbin/httpd.worker. I wrote a script to
run it:

=======================================================
#!/bin/sh

#httpd.worker -h > $HOME/webapps/unicorn/apache2/bin/b.log

/usr/sbin/httpd.worker -f $HOME/webapps/unicorn/apache2/conf/httpd.conf -E
$HOME/webapps/unicorn/apache2/bin/error.log -k start
=======================================================

My start script can be run even under:
=======================================================
sudo su
env -i PATH=/bin:/usr/bin:/sbin:/usr/sbin /bin/sh
export HOME=/home/nuwa
/home/nuwa/webapps/unicorn/apache2/bin/start
=======================================================

But I always got "Excution failed", my monit.conf:
=======================================================
check process unicorn with pidfile
/root/webapps/unicorn/apache2/logs/httpd.pid
    start program = "/usr/bin/env HOME=/home/nuwa
/home/nuwa/webapps/unicorn/apache2/bin/start" with timeout 60 seconds
    stop program  = "/usr/bin/env HOME=/home/nuwa
/home/nuwa/webapps/unicorn/apache2/bin/stop"
=======================================================

There are no any output to error.log, and even I wrote only this code in my
start script:
=======================================================
/usr/sbin/httpd.worker -h > $HOME/webapps/unicorn/apache2/bin/b.log
/usr/sbin/httpd.worker -h 2> $HOME/webapps/unicorn/apache2/bin/c.log
=======================================================

There are still no any output to b.log and c.log. It seems like httpd.worker
failed to run.
I have no idea to debug this situation,
 
How can I make it work or debug this?

Thanks.
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