What are similarities and differences between MS-DOS and UNIX?

Answer 1

Difference: Back in the days before Microsoft Windows dominated the PC market, operating system were controlled by commands. Prior to MS-Windows, PC users were required to learn these commands in order to perform routine tasks. During the 1980s, Microsoft DOS dominated the PC market while the early UNIX command systems were used on larger multi-processing servers. The main difference between UNIX and DOS is that DOS was originally designed for single-user systems, while UNIX was designed for systems with many users. While PC's have evolved into GUI interfaces such as Windows, UNIX systems have never evolved into GUI environments. Hence, The Oracle professional must master a bewildering number of cryptic UNIX commands in order to manage their Oracle databases, both on Windows NT and UNIX. One of the most confounding issues for the UNIX neophyte is being confronted with a complex UNIX command. The cryptic nature of UNIX is such that even the most seasoned UNIX professional may have trouble deciphering the purpose of the command. Because UNIX and MS-DOS were developed at the same time they share some common syntax, and the UNIX neophyte will be happy to find many common commands and concepts.

Similarities: Both has CLI option and both are quick.