As a self-taught server maintainer, often times I have to set up a server for my websites. During my early years, I have a difficulty on determining which file/folder permission to use on particular files. At first, using root account to manage web server files was what crossed my mind, but then I g...

Stars are born within the clouds of dust and scattered throughout most galaxies. A familiar example of such as a dust cloud is the Orion Nebula. Turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attrac...