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LINUX
What is Linux
Linux is, in simplest terms, an operating system. It is the software on a computer that enables applications and the computer operator to access the devices on the computer to perform desired functions.Linux's kernel (the central part of the operating system) was developed by Linus Torvalds at the University of Helsinki in Finland.
Kernal
Each operating system uses a kernel. Without a kernel, you can’t have an operating system that actually works.
The kernel’s job is to talk to the hardware and software, and to manage the system’s resources as best as possible.
It talks to the hardware via the drivers that are included in the kernel
Architecture
Find Commands
alias l=lswgetfind . -name tecmint.txtfind /home -name tecmint.txtfind /home -iname tecmint.txtfind / -type d -name Tecmintfind . -type f -name tecmint.phpfind . -type f -name "*.php"
Permission
The Permission Groups used are:owner-ugroup-gall user-o or a
The Permission Types that are used are: r - Read=4 w - Write=2 x – Execute=1
chmod man chown(change the owner or group of the file ) sudo
commands
scpssh(securely login onto remote system)grepcdCd ..
commands
cpvimbashrcifconfig/etc/hosthostname
ps -eaf | grep javakill -9pwd (current Directory)passwd-for change passwordln -s (softlink)ln(hardlink)mkdirrmdir(remove empty directory)rm -rftar zip
How to change the default port of localhost in grails
-Dgrails.server.port.http=8090
Thank You