load without any analysis (file header at offset 0x0): r2 -n /path/to/file

• analyze all: aa
• list functions: afl
• seek to function: s sym.main

• open project: Po <name>
• save project: Ps <name>
• edit project notes: Pn -

• show basic block disassembly: pdb
• show function disassembly: pdf
• show function arguments: afa
• show function variables: afv
• rename function variable: afvn
• set function variable type: afvt
• add/analyze function: af

by default, these get displayed in disassembly listings to the right of a line. disable them in V visual mode using ' (single quote).

multiline comments are not rendered handled well. they don't look pretty.

• add comment (using editor): CC!
  • note: multiline comments are not formatted nicely
• append comment: CC <text>
• overwrite comment: CCu <text>
• show comment: CC.
• show comment in this function: CCf

• enter visual mode: V
• quick command/seek: _ <search string>
  • apparently, you can update the list of commands shown here by changing $R2HOME/hud. doesn't seem to work though.
  • ref: http://radare.today/posts/visual-mode/
• show cursor: c
• add comment: ;
  • add multiline comment: ;!
  • remove comment: ;-
• set function name: dr

"flag" means give something a type. like function or symbol.

• enter graph modes: VV

• cycle types of graphs:

  • forward: p
  • backwards: P

• types of graphs:

  • graph view
  • graph view + opcode bytes
  • esil
  • esil + comments
  • overview

• seek to function: g<identifier>

• undo seek: u

• show comments: '

• add comment: /

• select bb: ???

• seek to next bb: tab

• seek to previous bb: TAB

• if bb has conditional branch:

  • seek to True target: t
  • seek to False target: f