A viral Reddit post about the behavioral changes cats can experience after being neutered has sparked widespread discussion online, earning 23,000 upvotes. The post, shared by Reddit user Prior-Wealth ... cat countryInfo.txt | grep -v "^#" >countryInfo-n.txt After some research i found that cat is for concatenation and grep is for regular exp search (don't know if i am right) but what will the above command result in (since both are combined together) ?

Understanding the Context

Thanks in Advance. EDIT: I am asking this as i dont have linux installed. Else, i could test it.