[bash] edit lines in a file
 

Hello,

Normally I solve all my problems in C++. However, few thinks can be solved easily with bash programming.
Now I have the following problem.
I have a file like:

[DebugMode]
Mode=0
StandAlone = 1

Now I want to change this to Mode=1 or Mode = 1
and StandAlone = 0

I have also a file where I want to comment out a line with # and insert a new line with text.
Like:

remote 10.22.22.1 2201

I want to comment this and insert a new line like:

#remote 10.22.22.1 2201
remote mail.google.com 2201

This should not be so hard.

thanks,

Peter

Now I want to / This should not be so hard.
OK, since you didn't ask for us to do your work for you, show us what you got.

You probably need sed, (read 'man sed'). The most interesting switches are -i and -e, and you need s command.

Ok sorry,

I did not proceed with my problem until today.
I read a good site

http://www.grymoire.com/Unix/Sed.html#uh-0

now I have this and it works.
openvpn.conf looks like:
#remote 10.0.0.1 1941
remote mail.google.com 1900
#remote mail.google.com 1912
#remote mail.google.com 2301

It deletes old lines with the context google and insert a new one.
Also some duplicate lines are removed.

#!/bin/bash
sed -e '/^remote/s/remote/#remote/g
/remote.*google/d' openvpn.conf |uniq > tmp.txt
sed -e '/remote/a\
remote mail.google.com 2201
' tmp.txt > tmp1.txt
mv tmp1.txt openvpn.conf
rm tmp.txt

And I have a script to change ini file variables
for 0 to 1 like:

#!/bin/bash

sed -e'/Mode.*=/s/1/0/g
/StandAlone.*=/s/1/0/g
/PreSave.*=/s/1/0/g' Prog.ini > Prog.new
mv Prog.new Prog.ini

Maybe these scrips can be modified. However, have fun with it.

Thanks,

Peter

or, in one go:

perl -pi.bak -e '/Mode/ and s/1/0/g' file