Execstack is a great tool for learning and training on Linux. It is a program which sets, clears, or queries the executable stack flag of ELF binaries and shared libraries. When I was looking to install it I took me a bit to find which package to install it in.
You can install with :
Ubuntu
$ sudo apt-get install prelink
Arch Linux
$ sudo pacman -S prelink
By the way, the
apt-file
tool is great for finding the packages that contain specific files (like theexecstack
command).