Appendix A Administrative
Appendix B add-ons
Appendix C facilities
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UNIX, an introduction and Commands
| Unix
was created in the late 1960s, in an effort to provide a multi-user, multitasking
system for use by programmers. The philosophy behind the design of Unix
was to provide simple, yet powerful utilities that could be pieced together
in a flexible manner to perform a wide variety of tasks.
Unix is an operating system. The job of an operating system
is to orchestrate the various parts of the computer -- the processor, the
on-board memory, the disk drives, keyboards, video monitors, etc. -- to
perform useful tasks. The operating system is the master controller of
the computer, the glue that holds together all the components of the system,
including the administrators, programmers, and users. When you want the
computer to do something for you, like start a program, copy a file, or
display the contents of a directory, it is the operating system that must
perform those tasks for you. |
Your ROCKCI DIY Virtual Server allows you to enter commands from the command prompt when you shell in using your TELNET client. The following is a summary of command to get you started. To try any of the following commands, type the command then Enter
| command | Description |
| man | Can be thought of as the HELP for Unix commands command
. Most Unix systems contain a manual (or help) system to get information
about commands. Your ROCKCI DIY Virtual Server is equipped with a manual
on using the system commands. For more information about any
UNIX command, type man at the command prompt , followed by the command
you would like more information about. For example, Typing the command
man cd will bring up the manual page for changing directory.
CD(1) FreeBSD General Commands Manual CD(1) NAME cd - change working directory SYNOPSIS cd directory DESCRIPTION
ENVIRONMENT
CDPATH
If the directory operand does not begin with a slash (/) charac-
|
| cd | change working directory |
| pd | return working directory name (lets you know what directory you are in now) |
| mkdir | make directories |
| rmdir | remove directories |
| ls | list directory contents |
| ls -l | list directory contents, List in long format showing permissions |
| chmod | change file modes (also known as changing file / directory permissions) |
| cp | copy files |
| mv | move files |
| rm | delete file |
| rm -d | delete directory (if the directory contains no files) |
| rm -r | delete files and directories Careful its dangerous |
| pico | Starts the pico text file editor program to let you edit
files on your ROCKCI DIY Virtual Server. By entering pico filename
, you can edit the desired file.
Some pico Commands: Ctrl+G Take the pico tutorial Ctrl+V View next page Ctrl+Y View previous page Ctrl+A Go to the beginning of a line Ctrl+E Go to the end of a line Ctrl+C Display the line number that you are currently on Ctrl+W Search for a word or phrase Ctrl+O Save (write-out) the file Ctrl+X Exit the pico editor |
| grep | Grep searches the named input files (or standard input if no files are named, or the file name - is given) for lines containing a match to the given pattern. |
| passwd | Change your password ! |
| du ~yourlogin | Check your disk space usage |
There are many sources of information regarding learning Unix and the above is by no means complete.
Here are some great Unix tutorials:
UNIXhelp for Users
What Is UNIX
Introduction to Unix
FreeBSD Tutorials
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