












A hollow, usually spherical or cylindrical projectile fired from a siege mortar or a smoothbore cannon. It contains an explosive substance designed to be ignited by a fuse or by percussion at the target site so that it will burst and scattered at high velocity its contents and fragments. Formerly called a bomb.























An operating system software user interface, whose primary purpose is to launch other programs and control their interactions; the user's command interpreter. Shell is a way to separate the internal complexity of the implementation of the command from the user. The internals can change while the user experience/interface remains the same.
"Bash"라는 이름은 "Bourne-again shell"의 약자이며, 이는 Stephen Bourne이 설계한 이전 Unix 셸인 "Bourne shell"의 이름과 기독교적 개념인 "다시 태어남"을 이용한 말장난입니다.














