85 lines
3.5 KiB
Plaintext
85 lines
3.5 KiB
Plaintext
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PC User's Guide To Unix
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If you are a PC user, the transition to Unix will be easier for
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you because of the similarities between DOS and Unix.
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One similarity is the hierarchical file system. As in DOS, Unix
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provides you with the ability to create directories so that you
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can organize your file system as you prefer. However, since Unix
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is a multi-user system, you will only have permission to create,
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modify, and delete files in the part of the file "tree" allocated
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to you. You can move around in the entire file system, for the
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most part, looking at and even copying files that are accessible,
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but you can only write files in your own area.
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File names on the HP-Unix system can typically be much longer
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than under DOS. The maximum length for file names is 255
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characters. File extensions can be longer than three characters;
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in fact, you can include more than one period (.) in a filename
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(for example, car.engine.block). Path names (complete file name
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and all directories associated with it) can not be longer than
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1,023 characters.
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Another similarity is in the command names; many basic Unix
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commands will be familiar to the DOS user. You will notice that
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a number of Unix commands are only two letters, contributing to
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the reputation that Unix is too cryptic. Once you've become
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accustomed to these terse commands, however, you will probably
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appreciate the few keystrokes required. Also, if you prefer
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names for commands other than what is provided by default, Unix
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systems provide the capability to ''alias'' a command (including
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your favorite options) to any name you prefer. The information
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on how to create command aliases is found online by typing man
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ksh (for the Korn shell) or man csh (for the C shell).
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A DOS/Unix table of commands is shown below. See the online man
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page for documentation on each Unix command by typing man command
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once you are logged on to any Unix system.
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DOS Command Unix Command Meaning
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=============================================================
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cd pathname or chdir cd pathname Change directory to
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pathname
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copy cp Make a copy of a file
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cls clear Clear the screen
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del or erase rm Delete (remove) a file
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dir ls List the contents of current
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directory
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md or mkdir mkdir Make a new directory
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PAGE 2
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ren or rename mv Rename a file (or move it
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in Unix)
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rd or rmdir rmdir Remove a directory
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type cat Display file on screen
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type file | more more file Display file a screenful at
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a time
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\ / Separator in a pathname to
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a file or directory
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(Copied by permission from the University of Virginia's Academic
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Computing Center Academic Computing Newsletter, June-August 1991
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issue, article by Dee Irwin.)
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