Unix is portable, multi-tasking and multi-user operating system.
Portable: Runs in different hardware architectures.
Multi-Tasking: Several programs can be executed at the same time.
Multi-User: Several users can use the Unix machine at the same time.
Monday, July 6, 2009
Thursday, June 12, 2008
What do you mean by Sourcing in Shell Scripting
Executing commands in current shell without opening a new shell to execute the commands.
eg:
vjsujay@linuxdemon$source sample.sh
or
vjsujay@linuxdemon$. sample.sh #dot(.) should be separated by a space(s)
Two main objective of sourcing:
1.) Exporting the common variables file in the current shell, when required.
2.) Exporting the reusable functions file in the current shell, when required.
eg:
vjsujay@linuxdemon$source sample.sh
or
vjsujay@linuxdemon$. sample.sh #dot(.) should be separated by a space(s)
Two main objective of sourcing:
1.) Exporting the common variables file in the current shell, when required.
2.) Exporting the reusable functions file in the current shell, when required.
Wednesday, June 11, 2008
What is Shell Script
A shell script is a sequence of Unix/Linux command(s) in a file and then execute the file as a command.
Monday, April 16, 2007
Differences between Linux & Windows?
1.Linux is free, whereas Windows costs money.
2.Linux file formats are free(you can access them in many different ways), but it's not the case in Windows.
3.In Linux, zero risk in violating license agreements.But in windows, if you violate the license agreement, you will be called as pirate.
4. Linux do better than Windows in Security and Networking.
Differences between Unix & Linux?
The primary difference between the two is that, Unix is just another proprietary binary-only OS or IP-based OS.
1. Linux runs on many hardware platforms.In contrast, a typical Unix is proprietary-hardware -bonded(this hardware tends to be much more expensive than the normal PC clone)
2. Linux look and feel are very similar to Windows, but it is sturdier and richer.While a typical Unix account looks like a mainframe from the 70's.
3. Linux is free, while many Unices(this is supposed to be the plural of unix) are very expensive.But, now a days some unices also available as free.
4. Most of the Linux distribution are compatible with each other.But there are almost thirty different, largely incompatible versions of the Unix OS available today.
I hope the above information will suffice the title.
1. Linux runs on many hardware platforms.In contrast, a typical Unix is proprietary-hardware -bonded(this hardware tends to be much more expensive than the normal PC clone)
2. Linux look and feel are very similar to Windows, but it is sturdier and richer.While a typical Unix account looks like a mainframe from the 70's.
3. Linux is free, while many Unices(this is supposed to be the plural of unix) are very expensive.But, now a days some unices also available as free.
4. Most of the Linux distribution are compatible with each other.But there are almost thirty different, largely incompatible versions of the Unix OS available today.
I hope the above information will suffice the title.
Why do we need Linux?
Top 3 reasons:
1. No need to pay hefty amount to buy Linux, because it is available as free.
2. Forget about viruses, because more eyes make fewer security flaws.
3. Highly reliable system, because it can run for years without restarting it.
What is Linux?
Linux, also known as GNU/Linux, is a free operating system, that comes with the source code that can be copied, modified and redistributed.
GNU is a unix like operating system, but not unix. GNU stands for GNU not unix, it's an recursive acronym.
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