📄 linux tutorial-1.htm
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<P align=center><I><B><A
href="http://www.cs.ncl.ac.uk/modules/2003-04/csc842/LinuxTut/index.htm">Home</A>
- <A
href="http://www.cs.ncl.ac.uk/modules/2003-04/csc842/LinuxTut/linux1.htm">(1)
Shells</A> - <A
href="http://www.cs.ncl.ac.uk/modules/2003-04/csc842/LinuxTut/linux2.htm">(2)
Files & Directories</A> - <A
href="http://www.cs.ncl.ac.uk/modules/2003-04/csc842/LinuxTut/linux3.htm">(3)
Processes</A> - <A
href="http://www.cs.ncl.ac.uk/modules/2003-04/csc842/LinuxTut/linux4.htm">(4)Shell
scripting</A> - <A
href="http://www.cs.ncl.ac.uk/modules/2003-04/csc842/LinuxTut/linux5.htm">(5)Makefiles</A></B></I></P></TD></TR>
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<TD width=580><FONT face="Times New Roman" size=5>Linux Tutorial - User's
view (1)</FONT>
<P><FONT face="Times New Roman" size=5>Shells (what are they and how do I
use them?)</FONT></P>
<P>A shell is the command line interface. The shell accepts commands.
After verifying that the commands are valid, the shell sends them to
another part of the environment to be executed. <FONT
face="Times New Roman">The shell takes commands written in text (as
opposed to binary - computer language), allowing the user to interact in a
manner more easily understood by a human. </FONT></P>
<P>UNIX systems offer a choice between several different shells, the most
popular being the <B>Cshell</B>, the <B>Bourne</B> shell, and the
<B>Korn</B> shell. Each offers a somewhat different command language. The
multitude of shells may make interfacing with the system difficult as each
one may have slightly different ways of doing some tasks. However, with
experience users usually become competent in the use of a number of shells
and usually decide upon a shell to use most frequently. The use of a shell
is a personal preference.</P>
<P>To use a shell you simply type commands. You may often find graphical
interfaces with UNIX systems. However, for the experienced computing
person the shell is commonly the preferred interface due to its
flexibility and directness (mouse clicks and graphical navigation can be
quite slow compared to typing).</P>
<P>As soon as you log into a system you will be provided with either a
window environment that allows you to instantiate a window for interfacing
via a shell or directly into a shell
interface.</P></TD></TR></TBODY></TABLE></BODY></HTML>
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