Latest Tutorials| Questions and Answers|Ask Questions?|Site Map



Login         

View Questions and Answers by Category

Advertisements


 
Have Programming Question? Ask it here!
 
 
 


N.SATHYANANDA
UNIX
1 Answer(s)      5 years and 4 months ago
Posted in : Java Beginners



Advertisement
View Answers

September 11, 2009 at 4:37 PM


Hi Friend,

Unix:

The UNIX operating system was developed at AT&T Bell Laboratories in Murray Hill, New Jersey in the late 1960's.Its major version is AT&T's UNIX System V.

It is having four basic components:
1) The kernel constitutes the nucleus of the operating system and
coordinates the internals such as allocating system resources.
2) The file system, which is part of the kernel, controls the storage and
access of data. It is similar to the VMS file system in that the structure is hierarchical.
3) Commands are programs that you request the computer to execute.
4) Programs (commands) called shells serve as command interpreters. They
act as links between the user and the computer, interpreting and executing
commands. They are also high-level interpretive programming languages.

Advantages of Unix:
1) Full multitasking with protected memory. Multiple users can run multiple
programs at the same time without interfering each other.
2) It is having Very efficient virtual memory, so many programs can run with a modest amount of physical memory.
3) It is secure and can access controls.All users must be authenticated by a valid account and password to use the system at all. All files are owned by particular accounts. The owner can decide whether others have read or write access to his files.
4) It provides the ability to string commands and utilities together in
unlimited ways to accomplish more complicated tasks.
5) It is portable.
6) It is optimized for program development, and thus for the unusual
circumstances that are the rule in research.
7) Unix is extremely powerful. User can customize their own shell easily, and can do pipes, shell scipts etc.

Disadvantages of Unix:

1) The traditional command line shell interface is user hostile designed
for the programmer, not the casual user.
2) Commands often have cryptic names and give very little response to tell
the user what they are doing.
3) There is a need to understand some of the main designs to use Unix well.
4) It makes the beginner confuse.

Thanks


Related Tutorials/Questions & Answers:
unix
unix  not able to download java into unix os
unix
unix  hai friends, I am new to to java with unix.can you any one tell me ho to work unix in windows xp.i search in net,it will show the aludra.usc.edu.how can i install this? thanks
Advertisements
The Unix error
The Unix error  var a=document.check.username.value; if(a=="" ) { alert("Enter a valid UserName"); return false; } if(!isNaN(a) ) { alert("Enter a valid UserName"); return
unix/ubuntu os
unix/ubuntu os  how to find jdk path in unix through terminal any command
unix programming - Development process
unix programming  write a c program that stimulates 'ls" command
unix program - UML
unix program  sorry there is no unix category i slected uml 1.write a c shell script on links? 2.write a c shell that stimulates the fork? 3.write a c shell that stimulates the umask? 4.write a c shell that stimulates
UNIX - Java Beginners
UNIX  Dear Sir, Kindly send some important points/notes in UNIX since I have taken the exam pertains to UNIX, so that it will be very helpful..., Unix: The UNIX operating system was developed at AT&T Bell Laboratories
JBoss Unix and Line Separator
JBoss Unix and Line Separator  Hi, I am trying to solve an critical problem. I have an application which write a batch file using the method println... separator from O.S. \n on unix, but I am trying to change to \r\n. I change
Connecting to Unix through Java - JavaMail
Connecting to Unix through Java  Could you please tell a sample code, where i connect to the unix server and run a script and write the results in a file and mail that file back to me
Unix Web Hosting
Unix Web Hosting Unix Web Hosting is the type hosting provided on the Unix Servers. Unix Web Hosting is very reliable hosting option. Unix Hosting.... UNIX web hosting and Linux web hosting are the most powerful and reliable hosting
Where i can use UNIX Operating System?
Where i can use UNIX Operating System?  Where i can use UNIX Operating System
Java code to run unix command - Java Beginners
Java code to run unix command  Hi, I need a java code to connect to a remote unix server and run a unix command. Please help. Regards, Pratyush
Unix and Perl Programmer
Unix and Perl Programmer       Position Vacant: Unix and Perl Programmer  Job Description  We are looking for Perl Programmers with Unix experience
in unix which command is used to create files
in unix which command is used to create files  in unix which command is used to create files   The cat command in UNIX can be used to create and display information from a file. Command to create a file % cat >
in unix which command is used to sort the lines of data in a file in reverse order
in unix which command is used to sort the lines of data in a file in reverse order  in unix which command is used to sort the lines of data in a file in reverse order   " sort -r " command in unix is used to sort
the commonly used unix commands like date ls cat etc. are stored in
the commonly used unix commands like date ls cat etc. are stored in  the commonly used unix commands like date ls cat etc. are stored
how to execute a unix shell script from a java program
how to execute a unix shell script from a java program  well , i am facing this problem.. i have tried a few sample codes but there isn't any solution . could anyone please give a sample code as of how to do this... what i am
What is difference between UNIX Hosting and Window Hosting
There are basically UNIX and Windows, two main types of operating system... in is primarily select the type of web hosting is needed. Stability: UNIX manage high server loads better than Windows and UNIX machines rarely require reboots
What is Linux?
What is Linux?                           Linux is an Unix based Complete
microtime()
PHP microtime() Function microtime() returns the current Unix timestamp with microseconds. microtime function is only available on operating systems...;microsec sec", where sec is the number of seconds since the Unix Epoch (0
date_timestamp_set
date_timestamp_set date_timsestamp_set alias DateTime::setTimestamp function is used for setting the date and time based on an Unix timestamp. Syntax... unixtimestamp - Unix timestamp representing the date. Return Values
date_timestamp_get
date_timestamp_get date_timestamp_get alias DateTime::getTimestamp function is used for getting the Unix timestamp.  Syntax public int DateTime.... Return Values Returns Unix timestamp representing the date
getdate()
containing the date information of Unix timestamp, or the current local time. ... is an integer Unix timestamp that defaults to the current local time if a timestamp... since the Unix Epoch, similar to the values returned by time() and used by date
mktime()
PHP mktime() Function The mktime() returns the Unix timestamp for a date that contains the number of seconds between the Unix Epoch (January 1 1970 00:00:00 GMT) and the time specified. The arguments may be left out in order from right
Linux Administrator
; We are looking for Linux Administrator to manage Linux and Unix servers.../Unix administration:  Installing and configuring Linux... with routers (Cisco preferably)  Knowledge of UNIX /Linux shell
strtotime()
PHP strtotime() Function The strtotime() parses a US English textual date or time into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 GMT). This function use the TZ environment variable (if available) to calculate
PHP Date and Time Date and time Tutorial
of seconds between the Unix Epoch (January 1 1970) and the time specified... arguments sequence is different from standart UNIX mktime function. Most
Perl Developer
; PERL and TCL TK  Unix/Shell/ scripts with Oracle and MySQL ... Years  Keywords: Perl, Developer, Unix Scripting, Linux Scripting, Shell
Open Source projects
Open Source projects Mono Open Source Project Mono provides the necessary software to develop and run .NET client and server applications on Linux, Solaris, Mac OS X, Windows, and Unix. Sponsored by Novell (http
 

 

 

DMCA.com