OSX ja iOS kommerts UNIX-id LINUX-i distrod ( LINUX ise on ainult kernel) Sisaldavad: 1)Pre-compiled kernel, libraries and tools, ready to install from image 2)A set of ready-made and packaged software (editors, browsers, desktop software) in the initial installation package 3) An easy and configurable set of tools to install more software 4) A large set of pre-configured software packages the installation tool will pull from the net and install Important core distros: Debian: .deb packages, focus on fully free software , Ubuntu based on Debian RedHat: largest commercial Linux provider, .rpm packages Slackware: one of the earliest, focus on stability and simplicity Gentoo: software installed by building from source Arch: minimalist, geared towards expert hackers Paralleelprotsessid on illusioon. Tegelikult pannakse 1 programm kinni ja siis antakse aega teisele ja siis pannakse see kinni ja antakse aega uuesti esimesele. Protsessidevaheline suhtlus:
Oskab programme seisma panna Oskab anda programmidele parasjagu aega ja mälu Oskab programme vajadusel korraks peatada ja taaskäivitada Oskab kettale faile ja katalooge kirjutada ja sealt neid lugeda. Oskab välisseadmetega (printer, monitor jne) suhelda. Oskab võrguga suhelda. Oskab intelligentselt mälu ja cachega tegeleda Oskab suhelda graafikakaardiga 16 Popular linux distros: First distro still alive: slackware Most popular ones right now: Mint: based on Ubuntu, offers special versions of Gnome 2 and 3 desktop Mageia: a freeware version of commercial Mandriva (RedHat derivative) Ubuntu: based on Debian, offers Unity fork of Gnome desktop Fedora: a freeware version of commercial RedHat OpenSuse: freeware version of SuseLinux (Slackware derivative) Debian: conservative distro wildly popular on servers, base for many others Arch: original,
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