Sorry for the off topic, but don't a better resource. I'm not great at scripting, but need a quick script to modify a file. I have a long file that has lines like this: some text some text2 CN=DATA.OU=XYZ.O=CO some text3 some text4 And this repeats, but XYZ changes. "DATA" is always called data. (it's being renamed basically) I need to change the middle line but leave the rest of the file as is like this: some text some text2 CN=XYZ_DATA.OU=XYZ.O=CO some text3 some text4 Anyone know a quick way to do this? Any help is appreciated. Thanks, James