Using git diff, how can I get added and modified lines numbers?

Question

Assuming I have a text file

alex
bob
matrix
will be removed
git repo

and I have updated it to be

alex
new line here
another         


        

Answer 1

Configure an external diff tool which will show you the line numbers. For example, this is what I have in my git global config:

diff.guitool=kdiff3
difftool.kdiff3.path=c:/Program Files (x86)/KDiff3/kdiff3.exe
difftool.kdiff3.cmd="c:/Program Files (x86)/KDiff3/kdiff3.exe" "$LOCAL" "$REMOTE"

See this answer for more details: https://stackoverflow.com/q/949242/526535