UNIX for Dummies Questions & Answers

Hi,
OS: Unix, linux, hp-unix (all unix flavours)

Iam trying to change some string values, special characters or otherwise in a file. As of now, i go using vi <filename>, open the file and do the edit manually and save it.
Is it possible to write a shell script so that i just run the script which inturn opens this particular file and changes all the stuff needed and save the same.
The string values will be in any line in the file.

In file change.sh (I have to change three things as mentioned below)

** change database ****

From

Code:

connect to F750PAX

To

Code:

connect to F750PBX

*** Change of path ***

From

Code:

../jre/lpp/java/J1.4.2/bin/java com.telex.pt.environment.agent.Agent $1

To

Code:

/usr/lpp/java/IBM/J1.4.2/bin/java com.telex.pt.environment.agent.Agent $1

** Change of site name and port number ****

From

Code:

hubURL=http://clist.check.com:80/PSEMHUB/hub

To

Code:

hubURL=http://register.lagoon.com:8001/PSEMHUB/hub

I suppose its possible, but iam looking for some lead from you folks. Also i would like to replicate this in windows environment by writing bat scripts (It does the same job as in unix - by changing values in saving file). In windows there is some testing tool which can be used. But iam only looking into through bat scripts and not using any tools.

Anyway this forum is apart from windows. (Can anyone give me the windows bat script blog/forum link?).

So i would appreciate if anyone case get me on the unix enivronment.

thanks for your time.

Try...

Code:

perl -pi -e '
s|connect to F750PAX|connect to F750PBX|g;
s|../jre/lpp/java/J1.4.2/bin/java com.telex.pt.environment.agent.Agent $1|/usr/lpp/java/IBM/J1.4.2/bin/java com.telex.pt.environment.agent.Agent $1|g;
s|hubURL=http://clist.check.com:80/PSEMHUB/hub|hubURL=http://register.lagoon.com:8001/PSEMHUB/hub|g' filename

Oh. Thanks. Its as simple as that, which i dont know.
BTW, i understand you have used perl. I dont think i have perl installed in my box. How do i check if perl is installed?
Iam yet to know 'perl'.
Can i put this (your code) into my shell script and run the same?

thanks once again for your response.

Thanks.
I found out from another thread "how to check that perl is installed on the system". That's perl -v
and checking my box, i do see perl is installed.

Thanks once again. I put it in a shell script and its working perfectly.