Most UNIX users are familiar with "the shell"; it is where you input commands and get output on your screen. Often, the only contact users have with the shell is logging in and immediately starting some application. Some administrators, however, have modified the system to the point where users never even see the shell, or in extreme cases, have eliminated the shell completely for the users.
Because the Linux GUI has become so easy to use, it is possible that you can go for quite a long time without having to input commands at a shell prompt. If your only interaction with the operating system is logging into the GUI and starting applications, most of this entire site can only serve to satisfy your curiosity. Obviously, if all you ever do is start a graphical application, then understanding about shell is not all that important. However, if you are like most Linux users, understanding the basic workings of the shell will do wonders to improve your ability to use the system to its fullest extent.
Up to this point, we have referred to the shell as an abstract entity. In fact, in most texts, it is usually referred to as simply "the shell", although there are many different shells that you can use, and there is always a program that must be started before you can interact with "the shell". Each has its own characteristics (or even quirks), but all behave in the same general fashion. Because the basic concepts are the same, I will avoid talking about specific shells until later.
In this chapter, we are going to cover the basic aspects of the shell. We'll talk about how to issue commands and how the system responds. Along with that, we'll cover how commands can be made to interact with each other to provide you with the ability to make your own commands. We'll also talk about the different kinds of shells, what each has to offer, and some details of how particular shells behave.
Saturday, December 5, 2009
Subscribe to:
Post Comments (Atom)
Privacy policy
At http://linux4fresher.blogspot.com/, the privacy of our visitors is of extreme importance to us. This privacy policy document outlines the types of personal information is received and collected by http://linux4fresher.blogspot.com/ and how it is used.
Log Files
Like many other Web sites, http://linux4fresher.blogspot.com/ makes use of log files. The information inside the log files includes internet protocol ( IP ) addresses, type of browser, Internet Service Provider ( ISP ), date/time stamp, referring/exit pages, and number of clicks to analyze trends, administer the site, track user’s movement around the site, and gather demographic information. IP addresses, and other such information are not linked to any information that is personally identifiable.
Cookies and Web Beacons
http://linux4fresher.blogspot.com/ does use cookies to store information about visitors preferences, record user-specific information on which pages the user access or visit, customize Web page content based on visitors browser type or other information that the visitor sends via their browser.
DoubleClick DART Cookie
Google, as a third party vendor, uses cookies to serve ads on http://linux4fresher.blogspot.com/.
Google's use of the DART cookie enables it to serve ads to users based on their visit to http://linux4fresher.blogspot.com/ and other sites on the Internet.
Users may opt out of the use of the DART cookie by visiting the Google ad and content network privacy policy at the following URL - http://www.google.com/privacy_ads.html
Some of our advertising partners may use cookies and web beacons on our site. Our advertising partners include ....
Google Adsense
These third-party ad servers or ad networks use technology to the advertisements and links that appear on http://linux4fresher.blogspot.com/ send directly to your browsers. They automatically receive your IP address when this occurs. Other technologies ( such as cookies, JavaScript, or Web Beacons ) may also be used by the third-party ad networks to measure the effectiveness of their advertisements and / or to personalize the advertising content that you see.
http://linux4fresher.blogspot.com/ has no access to or control over these cookies that are used by third-party advertisers.
You should consult the respective privacy policies of these third-party ad servers for more detailed information on their practices as well as for instructions about how to opt-out of certain practices. http://linux4fresher.blogspot.com/'s privacy policy does not apply to, and we cannot control the activities of, such other advertisers or web sites.
If you wish to disable cookies, you may do so through your individual browser options. More detailed information about cookie management with specific web browsers can be found at the browsers' respective websites.
Disclaimer :
All the pictures and material on this blog are assumed to be taken from public domain. The copyright (if any) of these pictures and articles belongs to their orginal publisher / photographer / copyright holder as the case may be. We claim no ownership to them. If anybody has reservations / objection on the use of these material/images or find any copy-righted material on this site, then please e-mail us with the details of copy right etc. In case, the objections is found to be appropriate, the offensive material / pictures will be removed from this site immediately.
No comments:
Post a Comment