Bash

• Missing ls or dir commands

  If you cannot run ls, dir, find nor grep to list files you can use

  echo *
  echo /any/path/*

• restricted bash (rbash) - GitHub Gist

  rbash is a shell with restriction features. Misconfigured rbash can be bypassed.

  # List available commands
  compgen -c
  
  # Run bash without profiles (when rbash is initialized in .bashrc)
  bash --noprofile
  
  # Read files
  mapfile -t  < /etc/passwd
  printf "$s\n" "${anything[@]}"

• shell from provided commands - Website

  Some commands/binaries allows to pop a shell. Use GTFOBins to find them. Here are the most common ones:

  Command	Description
  less	!/bin/sh
  vim	:!/bin/sh