Cygwin's default person interface is definitely the bash shell running in the mintty terminal emulator.[25] The DLL also implements pseudo terminal (pty) devices, and Cygwin ships with a number of terminal emulators which are according to them, which includes rxvt/urxvt and xterm. The Edition of GCC that comes with Cygwin https://gunnerwwwwv.blogchaat.com/37300140/little-known-facts-about-acgwin