vim

Vi IMproved, a programmer's text editor.

Open a file with cursor at the given line number:

vim {{file}} +{{linenumber}}

Open multiple files at once, each file in it's own tab page:

vim -p {{file1}} {{file2}} {{file3}}

Open a file in read-only mode:

view {{file}}

Exit vim:

[Esc] (to switch to normal mode), then :q