Getting info from wtmpx files

Anyone know how to code a shell script that will get the userid and last login from wtmpx files of that system and compare it with another wtmpx file FTPed from another system?? Any kinda help is greatly appreaciated!!! thnx in adv

last -f <path to wtmpx file> <user>


what exactly do you want to compare between the output of different files?

I just want to compare the user ids between the two files. I want to extract out users in FTPed wtmpx file that are not in the system wtmpx file.....is there any code to do it? thnx

Can't you just do a for loop of all the unique id's in one and grep for that id in the other?

I'm not familiar with the wtmpx file, but you can do something like the following:

cat <file> | tr "<tab>" " " | tr -s " " | cut -d " " -f <field user id is in>

to get the ids

then a

sort -u

to get the unique id's

using that list

for id in <list>
do
if [ -z "`grep ${id} <other file>`" ]
then
echo ${id} is not in <other file>
fi
done