I'd really love to understand how to do this as well. The supplied answers suggest .profile modifications but this only solves login initialization before the "real" shell is invoked (right?). I've been longing to port lots of my old 4Dos batch files to Perl but they won't affect my current shell environment. I don't want to write shell scripts. I'm just not a "fi" kinda guy. I have an script "mc" which takes one param and does a mkdir && a chdir on it which I find very useful... in 4Dos but Perl can't do it. Even if it's convoluted or compromises security or whatever, doesn't anybody know how to manipulate your parent process effectively from a Perl script? If I ever figure out on my own, I'll be sure to post it but all I've ever heard is it can't be done and I haven't had time to try to be underhanded myself yet. Hopefully somebody knows. TTFN & Shalom.
p.s. Byslexia is a Ditch!