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script doesn't perform the same as task done by hand

Good Morning,

I've written a script to enable console access through the serial port for a RHEL 5 installation. Everything works fine except for changing what systty points to. If I run the script, systty doesn't change. If I do the tasks by hand, it works. Any ideas?

Here is the portion of the script:

Code:

#!/bin/sh

DATE=`/bin/date +'%d%b%y'`

cd /etc/makedev.d

FIL=`grep systty * | cut -d: -f1`

sed -i.${DATE} 's/^\(ls*systty\s*\)0$/\1S0/' ${FIL}

cd /dev

rm systty

./MAKEDEV systty

The file is changed as expected, but systty doesn't point to ttyS0.

Add full pathnames to everything and try the script again.

It does. I just didn't type them all in. The file in /etc/makedev.d gets edited and looks fine. But when I run /dev/MAKEDEV systty it doesn't point to ttyS0. Just a tad frustrating. :)

When I do a diff on the file I see:

diff 01linux-2.6.x 01linux-2.6.x.30Mar09
< l systty ttyS0
---
> l systty tty0