How do I turn on line numbers permanently in IntelliJ 14? [duplicate]
Permanently (Ubuntu):
File > Settings > Editor > General > Appearance > Show Line Numbers
For just the current editor:View > Active Editor > Show Line Numbers
You can do it even faster, using the Search Everywhere tool (press Shift twice): type "Show Line Numbers" (or even "line") and the top hit is the switch for permanent line numbers.
There are 2 switches for line numbers, one that has a On/Off switch and works globally, and one without the switch - for the current file. And one more for the Active Editor (current file).
Go to Settings/Editor/General/Appearance and enable Show line numbers to permanently show line numbers for all editors.
The solution with View > Active Editor > Show Line Numbers seems to work only for the active editor (when you close the current tab or open a new file you have to enable it again).