How can I permanently enable line numbers in IntelliJ?

Question

How can I permanently enable line numbers in IntelliJ IDEA?

Answer 1

IntelliJ 14 (Ubuntu):

See: how-do-i-turn-on-line-numbers-permanently-in-intellij-14

Permanently:

File > Settings > Editor > General > Appearance > show line numbers

For current Editor:

View > Active Editor > Show Line Numbers