HowToUnix: Problem in file removal -sh: /bin/rm: Argument list too long

Error:-
Was getting -sh: /bin/rm: Argument list too long error while trying to delete more than 60K files.

Resolution:-
find . -name "*.abc" -exec rm {} \;
Which will remove all files ending with 'abc'.
Check the following link
Argument list too long

HowToUnix: Problem in file moving -sh: /bin/mv: Argument list too long

Error:-
Was getting that error while trying to move more than 60K files.

Resolution:-
find [abc]* -depth | cpio -pdumav /your/target/directory

Informatica 7.1.5:How to replace the old connection with a new one

How to replace the existing connection with a new
one without redefining all source/target/lookup connections in every
session?

All connections whichsover you will create will be stored into INfa meta.And thus any any changes in connection will make sessions invalid.
In that case after creating your new relational connection,replace the old one with new one.You can do that from the menu CONNECTION.