Linux Basic Commands for Beginners

basic_linux_commandLinux Basic Commands and Examples of them

Commands: A instruction  for a computer or device to perform a specific task know as ‘Command’. It give through terminal as input (by user), so also we can say that command is an interpreter.

[gaurav@gauravx ~]$____

Command line:  A command line is a text-based interface which can be use to input instruction to a computer system. A Linux command line is provided by a program called “The Shell“.  So in previous post shell are covered, where or as all know there are many Shells have been developed.  So The default shell for users in Linux is the BASH Shell (Borne Again shell) and also it is in MAC OSx.

Instruction: Open terminal ( ctrl+shift t ) it displays a string like “ [user@hostname~]$ _ or  [root@hostname~]$#_” mean of this, it is waiting for a command from the user  ‘it is called Shell prompt’.

So command entered at the shell prompt have three basic parts Continue reading

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Linux Boot Process- How it executes

run_levelLinux Boot Process 

Basically “Boot Process A CPU gets its instructions from memory. The CPU reads instruction from the BIOS and searches for the hard disks, CD drives and other hardware. The BIOS program looks at the first sector for boot code.

The boot process for Linux goes through several stages. Different systems follows different stage here in Linux  have 6 stages of Boot.

 

  • BIOS   ( Basic Input/Output System )   Boot
  • MBR    ( Master boot Record )
  • GRUB  ( Grand Unified Boot Loader )
  • Kernel
  • init
  • run level init 0 – init 6 )

Continue reading

System Administration

system_adminSystem Administration

System Administration, The Administration is designed for the IT Professional. There are various category of Administration like,

  • Network Administrator
  • Project Administrator
  • IT Administrator
  • Linux System Administrator
  • Data Base Administrator etc

The person who is responsible for setting up and maintaining the system or server is called as the system administrator. System administrators may be members of an information technology department.

System administration is the field of work in which someone manages one or more systems, software, hardware, servers or workstations.A system administrator, or sysadmin, is a person responsible to maintain and operate a computer system or network for a company or other organization. System administrators are often members of an information technology department.  Its goal is ensuring the systems are running efficiently and effectively. Continue reading