Single quote behave normally but double quote is replacing the "$$" character with pid of open shell and "$<some text >" would not print anything as if it acting as a comment. Basically the problem is that double is parsing some of special character which it should not. In the attachment you would see hash having "$" in between then and is being parsed as mentioned above and hence does not write anything in file. Thanks and Regards.
- bug#68501: Misbehaving of text inside double quotes" &qu... LitHack
