Sed usage

treed · 03-21-2009, 10:50 PM

I am trying to change the following line in the ldap.conf file using sed:
pam_filter host=orbit

So far my sed script from command line looks like the following:
1. sed -n 's/pam_filter host=orbit/pam_filter host=aiso-basic/g' ldap.conf

2. sed -n 's/(pam_filter\ host\=orbit)/(pam_filter\ host\=aiso\-basic)/g'

What I really want to do is
sed -n 's/pam_filter host=orbit/pam_filter host=`echo hostname`/g' ldap.conf

I tried escaping the space between filter and host. As well as the equal sign.

Any ideas anyone

syg00 · 03-22-2009, 12:19 AM

Quote:

Originally Posted by treed

Any ideas anyone

Well 3 (at least) come to mind:
- if you want to update the file use "-i"
- You probably want `hostname` rather than `echo hostname` - $(hostname) is better
- use double quotes rather than single

ghostdog74 · 03-22-2009, 02:51 AM

awk

Code:

awk -F"=" '/pam_filter host/{$2="aiso-basic"}1' OFS="=" file

treed · 03-22-2009, 04:23 PM

I did the following in case anyone wants to know:
sed -i 's/pam_filter host=orbit/pam_filter host=aiso-basic/g' ldap.conf

Still working on echo hostname portion.

I tried the awk command but did not get that to work. I may have missed something there.

treed · 03-22-2009, 05:39 PM

sed -i 's/pam_filter host=someserver/pam_filter host='`hostname|cut -f1 -d'.'`'/g' filename

Please note those are single quotes and inside those single quotes are back ticks