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Linux Certification course study notes: Unit 1: Introduction to Linux


History of Linux:
In 1962 Bell wanted to define a new OS. There were 2 Scientists Dennis Ritchie and Ken Thompson.
They made use of B language for the project of multix. It had a disadvantage of not having portability. So they made use of C language for UNIXos in 1970. Because it is open source, it got different flavours of Linux.

Kernel:
It is the part of Linux interfaces with hardware, mainly works with device drivers.
Example for Kernel: vmlinuz

Shell:
Shell is the user interface to make requests of make commands. It makes suet the command syntax is correct.
Example for shell: Bash shell, C-shell (csh), Basic Shell (sh)
Bash shell and C shell are multi user shells.

Bash shell: it has an automatic command completion feature. Also it has a history feature.

Linux Graphical Environment
1) GNOME - Designed in C language
2) KDE - Designed in C++ language, is more user friendly.

go to Unit 2: 

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