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  OSS, Linux, BSD, Virtualization, other OSes🐧  
   for Windows and MacOS see at the respective headings:  
  Index 
  
   generic package search 
   distributions, distribution specific offers & package search, downloading 
   raw software search, git hoster 
   🗏 popular Open Source Software (with Windows & MacOS availability)  🖫 
   Linux forums & chat 
   Linux articles, resources & blogs, FSFE 
   Virtualization (Linux, Win, MacOS, BSD)   
   Configuration (DNS[SEC], NTP, mail)  
    more Operating Systems (BSD, Win, MacOS, DOS & more)   
   crossref:   Linux-Hardware  🛒 
    cross:  /oss 🐧 , /creat 🖌 , 
     /sci 🧪 , /dev 💻 , /tools 🛠 
     got to  main index 
   
   
  up 
  generic package search 
  
     rpmfind.net , including find/search for i586, i686 packages (IA32)
      direct: fedora buildsystem , opensuse package search  (including IA32 & the build systems)
      pkgs.org  many package formats including .rpm and .deb
      rpm.pbone.net  more packages but just for rpm
      python: pypi , perl: cpan , nodejs: npmjs , Cocoapods  (via Ruby)
      FlatHub ,
         AppImages , 
         snapcraft.io  (packages for snap ),
         docker.com/search : find docker containers
        // container-docs ↑💻 
      F-Droid , UptoDown , AppImageHub , UD: freely download Android , MacOS , Windows  packages, no registration required
    
  up 
  distributions, distribution specific offers & package search, downloading 
  
     Debian  (community distro, i.e. free & open):
      package search , 
      releases ,
      download:  stable  (https ), 
         testing  (https ), 
         firmware  (https ), 
      Atterer´s download tool   
         (+src/win+https ), 
      Mageia  (community distro), 
      package search 
      openSUSE  (sponsored by Novell):
      package search , 
      oS Build Service 
      more distros: Fedora  (sponsored by RedHat), Linux Mint  (community),   (non-community, no release media)
      Ubuntu  (from Canonical),
      Launchpad  
      You want to self-compile your own distro: Gentoo  (community), Linux From Scratch 
      Slackware  (non community) also suitable for very old PCs: Slackware 9 runs on i386, Slackware 11 on i486
      immutable Linux:  Fedora Silverblue ,
         Debian Endless OS , 
         openSUSE MicroOS  
      embedded devices, routers:  OpenWrt  ~ at Debienna , legacy NSLU: Wiki , repo: ipkg.nslu2-linux.org , Unslung Firmware , WayBack: slug-firmware.net  (no binary download), /dev/#hw ↑⌮ 
      System Rescue CD , Tom´s root boot : floppy that also boots on an i386 computer
      Security Distros ↑🗝 , not Linux, not OSS: Ultimate Boot CD 
    
  up 
  raw software search, git hoster 
  
     LinuxLinks , Links2Linux 
      linux-apps.com , apps.kde.org 
      sourceforge.net 
      /explore: github.com , gitlab.com 
    
  
  up 
  Linux forums & chat 
  
     LinuxQuestions.org , linux.org/forums ,
         knowledge.informatica.com , 
         StackXchg forums 
      German forums: linuxforen.de , linux-community.de , linux-web.de 
      Mailing Lists: Debian mailing lists , program specific mailing lists: search yourself
      IRC: netsplit.de : channel search, web.libera.chat  (OSS & Linux), webchat.oftc.net  (#qemu etc., #debian), IRC-howto ; libera/list 
      pasting code:  privatebin , dpaste , ix.io : curl-cmd, termbin.com : for nc & command line
    
  up 
  Linux articles, resources & blogs, FSFE 
  
     LinuxOpSys : first steps, Linux Basics, Linux for Beginners  (DigitalOcean) , docslib.org : Linux intro & more
      tech info: LinuxGuruz , CentOS HowTos , 
         ArchWiki: contents /search , 
         Mageia ,
         openSUSE ,
	 Debian Wiki +HwTs ; de: Referenz /Handbuch , 
         Ubuntu: manual ; de: users , 
         many: Linuxize , LinuxHandbook , linux.org 
      news: DebugPointNews ,
         TecMint , 
        UbuntuPit , 
        LinuxAndUbuntu ,
        TecAdmin , 
        de: LinuxUndIch 
      articles: Linux magazine , 
         LM in German , 
	 pro-linux.de ,
	 FS-magazine 
      fr: Lea-Linux , linuxfr ,
	TheGeekDiary  (SELinux, Apparmore, iptables) 
      howtos: OSTechnix , 
        LinuxTechi , 
        HowToForge ,
        2DayGeek , 
        XModulo  
      blog: LinuxUprising ,
        LinuxConfig , 
	NixCraft /CyberCity , 
        TheGeekStuff  
      books:  Linux-training.be ,
         news  about the Linux Kernel : LWN 
      The Linux Documentation Project:  TLDP /quick link:  HowTos   (may not be the newest)  
      howto: compile  the Linux kernel  - Hunt for 4K  (de ) + UHD graphics
      Free Software Foundation Europe 
    
  up 
  Virtualization (Linux, Win, MacOS, BSD)   
  
     Qemu : Virtualization, multiple OS, in Linux kernel; i.e. most easy to use for Linux (download)
      VirtualBox : GUI-Virtualization, multiple OS (download)
      VMware Workstation Player : restricted, you can not create own images (download)
      Microsoft Windows , Oracle Solaris : development environments for VirtualBox and more formats
      free VirtualBox Images : get an image without the need to install from scratch
      converting image files  - quick guide
      drvtools  (Linux) - boot a dual boot OS from same hard disk with Qemu (limits other parts to read only), burn sparse raw images on blue ray 
      systemd-container  (Linux)
      Xen Beginner´s Guide (wiki)  (Linux)
      xchroot  (Linux) - how to create a chroot environment, GUI programs incl. dekstop link out of chroot, GUI sessions out of chroot & more
    
  up 
  Configuration  
  
     DNS (/etc/resolv.conf ):  lifewire list , opennic , opendns , dismail.de , uncensoreddns  (test a few times: dig @208.67.222.123  index2web.com | grep "Query time" ) 
      dns[sec] /bind9 configuration: IANA Root Files  (dnssec : put  ". 86400 IN DNSKEY 257 3 8 AwEAAaz…"  into  /usr/share/dns/root.key , from Root Zone File )
     NTP (network time protocol) : intro & config , pool.ntp , dismail.de  (/etc/ntp.conf, systemctl status ntpd)
      linode: Firewalls , SELinux & more, netfilter howtos  + FAQ : fitlering & NAT  # linuxguruz networking  
      e-mail:  mutt , NeoMutt: guide /man , mailx  (s-nail )
         # ssh:  gpg-key for ssh 
      printer:  cups/localhost , drivers , cups -onlineDocs , Ghostscript-docs 
      
  up 
   more Operating Systems  
   BSD Unix-variants (all open source like Linux!)  
  
     FreeBSD  (most widespread)
      OpenBSD : on reddit , puffy.cafe   (they contend for secure networking, authors of openssh)
      DragonFly BSD  (you may try this for old seldom hardware, features like virtual kernels)
      NetBSD 
    
   BSD systems have a license that does not exclude commercial use: MacOS is built on top of BSD; BSDs also have chroot-jails, chroot as a security feature  
   Windows, MacOS, DOS & OS/2  
  
     win→tux:  Cygwin : Linux environment
      for Windows, CoLinux  Linux under
      Windows, install WSL  (Windows System on Linux), 
      tux→win:  Wine , WineTricks, PlayOnLinux : Windows on Linux (Debian: contrib) 
     MacOS:  Homebrew , MacPorts , Fink , needs gcc for OSX/MacOS , otherwise you need the proprietary Xcode  (or: newest ) monstrosity
      Mac-add-dev: RubyGems  +other MacDevSetup, Cocoapods 
     de:  Einführung in Windows & HTML: EDV-Lehrgang 
      Ecomstation , Arca Noae : OS/2 for i586 (OS/2 also has a good DOS-Emulation)
      IBM OS/2:  OS/2 Warp installation and update manual , works on i486, i386 and i286 computers, protected mode (80286 is 16bit protected mode)
      DOSBox-X : cross-platform DOS emulation, Win 3.x and Win 9x supported; more and better features compared to DOSBox.
      FreeDOS  real mode, can address no more than 1MB RAM, still used for BIOS updates and legacy sw; you may try DOSBox-X instead of Qemu or VirtualBox-ing FreeDOS
      Δsoft GEM : ancient IDE upon DOS, dominant before Windows 3 on 8086 computers
    
  Windows 3.1 was originally booted on top of DOS. Windows 95 & 98 are own OSes, running a DOS extender on real mode, Windows NT and XP the first protected mode 32bit OSes 
  alternative OSes 
  
     Haiku OS , Qubes OS , GNU Hurd , MenuetOS 
    
  
  
   
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