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2.6 SEVEN UNIX COMMANDS YOU CAN'T LIVE WITHOUT:
If you connect to the Net through a Unix system, eventually you'll have to come to terms with Unix. For better or worse, most Unix systems do NOT shield you from their inner workings — if you want to copy a Usenet posting to a file, for example, you'll have to use some Unix commands if you ever want to do anything with that file. Like MS-DOS, Unix is an operating system - it tells the computer how to do things. Now while Unix may have a reputation as being even more complex than MS-DOS, in most cases, a few basic, and simple, commands should be all you'll ever need. If your own computer uses MS-DOS or PC-DOS, the basic concepts will seem very familiar — but watch out for the cd command, which works differently enough from the similarly named DOS command that it will drive you crazy. Also, unlike MS-DOS, Unix is case sensitive — if you type commands or directory names in the wrong case, you'll get an error message. If you're used to working on a Mac, you'll have to remember that Unix stores files in "directories" rather than "folders." Unix directories are organized like branches on a tree. At the bottom is the "root" directory, with sub-directories branching off that (and sub-directories in turn can have sub-directories). The Mac equivalent of a Unix sub-directory is a folder within another folder.
cat Equivalent to the MS-DOS "type" command. To pause a file every screen, type
cat file |more