Add to text file from command line via echo... possible to add to a particular line?[Scanned]

[Chris Bradford]

Hi guys,

I'm making a setup script for my Linux boxes that re-install Openldap 
and some other bits and bobs. I need to add some text to /etc/pam.d/gdm 
for example, and it needs to be on a particular line in this file, not 
at the bottom.

For example using the command:

echo 'session   required   pam_mkhomedir.so skel=/etc/skel umask=0077' 
 >> /etc/pam.d/gdm

Will only add this to the bottom of the file, can I get around this, it 
needs to be on the same position on all machines, ie line 8.

Cheers,

-Chris


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