17th October, 2020
Welcome to Unix/Linux Tutorials by Linux Experts. The objective of these tutorials is to provide an in-depth understanding of the Linux Operating System. In these tutorials, we will cover topics such as Architecture, OS Commands, Vi Editor, and File Permissions. We will also cover advanced topics such as Scheduling Jobs, User Administration, Disk Partitioning, Package Management, and Troubleshooting of common issues.
In addition to the free Linux tutorials, we will also cover common interview questions, issues, and how to's of the Linux operating system.
Single user systems: Provides a platform for only one user at a time. They are popularly associated with the DeskTop Operating System which runs on standalone systems where no user accounts are required.
Multi-User Systems: More than one user can access the same system resources (CPU, applications, memory, printers ………etc) at the same time known as multiuse.
Example: UNIX, LINUX
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Multiuser: A multi-user Operating system allows more than one user to share the same computer system at the same time.
Multi-Tasking: More than one program can be run at a time. The main concept of multitasking is maximum utilizing CPU resources
Open System: The UNIX is open source code i.e Any user can modify Unix open-source code according to there ideas and requirements
Security: One of the most valued advantages of Linux over the other platforms lies with the high-security levels it ensures. Every Linux user is happy to work in a virus-Free environment and use the regular virus – prevention time needed when working with other operating systems for another more important task.
--> UNIX/LINUX has given two levels of securities.
Portability: Portability means Independent of hardware & processors
Communication: The main concept of communication facility Exchanging of information or files from one user account to another user account.
Programming Facility: UNIX o/s provides shell. Shell works like a programming language. It provides commands and keywords.
|Script Language||Programming Language|
|It is an interpreter based language.||Compiler based language|
|Interpreter Converts high level||The whole program is a single short into machine language.|
|Doesn’t create .exe files||Create .exe files|
|No need to compile the program.||Need to compile the program|
|It takes fewer lines of code||Takes numerous lines of code.|
|Reduces cost of maintenance||Increases the cost of maintenance.|
Help facility: It is a beautiful feature of UNIX/ LINUX Operating systems. Don’t know the information about the given command just go through the helpline.
#Man <command name>
#info <Command name>
#<command name> --help
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