My Radare2 Cheat Sheet

Renaming

# rename a function
s <function_flag>
afvn [new_name]

# List local function variables
afv
# Rename variable
afvn [old_name] [new_name]

Telescoping stack view

pxr @ esp

Find symbols in libc

dmi libc system

Search for strings

/ /bin/sh @ <address>

Some GDB Debugging tricks as well

Inspect the stack

x/100b $esp
x/100s $esp
x/100x $esp

Disassemble some code:

disassemble main

Set a breakpoint:

break *0xcafebabe

Go to debug mode:

ctrl^x ctrl^a
layout asm 
layout regs

An out of place Strace Command

To trace only file access:
strace -e trace=file ./utumno1.out testtest

Similarly for network, process, ipc or memory:
strace -e trace=network ./utumno1.out testtest

strace -e trace=process ./utumno1.out testtest

strace -e trace=ipc ./utumno1.out testtest

strace -e trace=memory ./utumno1.out testtest

This is very useful for reversing what a binary is doing when there’s no symbols and the debugger is failing us.