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1.)What is the difference between bash and zsh? Bash and Zsh are both shells for your terminals. Bash or the Bourne-Again SHell, is the default on most systems due to backward compatibility reasons with  sh  which was pretty much the only shell in its time.  Before I begin elaborating on the differences, there should come the most important item, the direct quote from the ZSH Documentation: 2.5: Similarities with bash The Bourne-Again Shell, bash, is another enhanced Bourne-like shell; the most obvious  difference from zsh is that it does not attempt to emulate the Korn shell. Since both  shells are under active development it is probably not sensible to be too specific  here. Broadly, bash has paid more attention to standards compliancy (i.e. POSIX) for  longer, and has so far avoided the more abstruse interactive features (programmable  completion, etc.) that zsh has. Now that the documentation is out of the way, let me begin discussing th...