01-21-2007
I thought I'll just share some knowledge about Unix and Linux.
I used Unix many years ago and the main features I remember about it are
1) The command line interface
2) The Vi Editor
3) Shell scripting
4) Regular Expressions
Unix is a powerful text-based operating system, its commands are terse, have many options and have many capabilites.
Recently we installed Linux, and the differences I observed were that Linux came with a GUI interface. Among the similarities I noticed that Linux also has a command line interface, and most commands I remembered from Unix also worked. For example ls for listing a directory, mkdir for creating a directory and so on.
I'm guessing that Unix might also have a GUI interface, but I'm not sure.
There are some commands that will help you discover or reference all other commands, configure commands etc.
These commands are
1) apropos - allows one to look-up search for commands by keyword.
2) man - allows one to look up the details of a particular command, it's options etc.
3) alias - allows one to assign a different name to an existing command, or a command with options.
I don't know if the information I gave confused you more.
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LEARN ABOUT FREEBSD
introduction
INTRO(1) BSD General Commands Manual INTRO(1)
NAME
intro -- introduction to general commands (tools and utilities)
DESCRIPTION
Section one of the manual contains most of the commands which comprise the BSD user environment. Some of the commands included in section
one are text editors, command shell interpreters, searching and sorting tools, file manipulation commands, system status commands, remote
file copy commands, mail commands, compilers and compiler tools, formatted output tools, and line printer commands.
All commands set a status value upon exit which may be tested to see if the command completed normally. Traditionally, the value 0 signifies
successful completion of the command, while a value >0 indicates an error. Some commands attempt to describe the nature of the failure by
using exit codes as defined in sysexits(3), while others simply set the status to an arbitrary value >0 (typically 1).
SEE ALSO
apropos(1), man(1), intro(2), intro(3), sysexits(3), intro(4), intro(5), intro(6), intro(7), security(7), intro(8), intro(9)
Tutorials in the UNIX User's Manual Supplementary Documents.
HISTORY
The intro manual page appeared in Version 6 AT&T UNIX.
BSD
October 21, 2001 BSD