First comes with the most important one — GNU coreutils,which contains the most essential commands like ls,cat and bla,bla…

brew install coreutils,and export PATH="$(brew --prefix)/opt/coreutils/libexec/gnubin:/usr/local/bin:$PATH",and add this alias to your .bashrc or .zshrc.

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alias man="a() { echo $1; man -M $(brew —prefix)/opt/coreutils/libexec/gnuman $1 1>/dev/null 2>&1;  if [ "$?" -eq 0 ]; then man -M $(brew —prefix)/opt/coreutils/libexec/gnuman $1; else man $1; fi }; a"

Next you may probably wanna install the following ones(for some of the packages,you need to run brew tap homebrew/dups first,the brew tap command allows you to add more GitHub repos to the list of formulae that brew tracks, updates and installs from.)

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brew install binutils
brew install diffutils
brew install ed —with-default-names
brew install findutils —with-default-names
brew install gawk
brew install gnu-indent —with-default-names
brew install gnu-sed —with-default-names
brew install gnu-tar —with-default-names
brew install gnu-which —with-default-names
brew install gnutls
brew install grep —with-default-names
brew install gzip
brew install screen
brew install watch
brew install wdiff —with-gettext
brew install wget
brew install vim —override-system-vi
brew install macvim —override-system-vim —custom-system-icons

Originally,the --with-default-names option was designed to prevent homebrew from prepending gs to the newly installed commands, thus we could use these commands as default ones over the ones shipped by OS X,but when I tried with this argument,it just didn’t work,lol.Alternatively, PATH tricks works.