All Unix, Linux and other Unix-like operating systems are families of computer operating systems derived from the original Unix System from AT&T Bell Laboratories. Today, the largest Unix descendent directly certified as UNIX is macOS by Apple. The original commercial Unix derivatives included HP-UX, AIX and SunOS, to name a few. The diversity and perceived incompatibility between various Unix systems led to the creation of interoperability standards including the Portable Operating System Interface (POSIX). We provide free Linux and UNIX shell scripting, system administration and other programming help.

• unix.com Page Speed

• unix.com Resources used by the page
  Unique hosts referenced by the page	25
  HTTP resources loaded by the page	120
  Static (i.e. cacheable) resources on the page	45
  CSS resources referenced by the page	5
  JavaScript resources referenced by the page	35

• unix.com Resource Breakdown in Bytes
  Main HTML document and all iframes on the page	170,880
  Text resources not covered by other statistics (i.e non-HTML, non-script, non-CSS resources) on the page	301,574
  CSS resources on the page	260,551
  Image resources on the page	355,798
  JS resources on the page	1,510,475
  Other resources on the page	206,378
  Total size of all request bytes sent by the page	36,817

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Mobile Version

• unix.com Resources used by the page
  Unique hosts referenced by the page	23
  HTTP resources loaded by the page	109
  Static (i.e. cacheable) resources on the page	91
  CSS resources referenced by the page	2
  JavaScript resources referenced by the page	24

• unix.com Resource Breakdown in Bytes
  Main HTML document and all iframes on the page	309,332
  CSS resources on the page	682,997
  Image resources on the page	434,598
  JS resources on the page	2,977,439
  Other resources on the page	118,924
  Total size of all request bytes sent by the page	16,243

• unix.com Mobile Page Speed

• unix.com Mobile-Usability

Alexa Rank Chart

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