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Full Discussion: Is UNIX an open source OS ?
Operating Systems Linux Fedora Is UNIX an open source OS ? Post 302910075 by sreyan32 on Tuesday 22nd of July 2014 09:36:54 AM
Old 07-22-2014
Is UNIX an open source OS ?

Hi everyone,
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.

Ok onto business, my questions are-:

  1. Was/Is UNIX ever an open source operating system ?
  2. If UNIX was closed source (as Wikipedia states as "historically closed source") then is LINUX a reverse engineered version of UNIX ?
    I mean if UNIX was closed source how did Linus Torvalds create a "UNIX-like" OS called LINUX without having access to the source code of a closed source OS. The only possible explanation seems reverse engineering UNIX just like ReactOS is a reversed engineered binary compatible version of Windows.
  3. Now this seems a little odd to ask. Is LINUX actually an OS ? Or is Linux just a kernel ? I am asking this because the Debian OS which I use can work on Linux, FreeBSD and I think the GNU Hurd kernel (I have no idea what it is by the way). Wikipedia defines Linux as an OS while I have never used an OS called Linux but I have used distros like "Fedora", "Debian", etc.

Okay that's about it for now. Please don't flame me, I am really confused between the basics here.

Thanks in advance.
 

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history(n)					       Provides a history for Entry widgets						history(n)

__________________________________________________________________________________________________________________________________________________

NAME
history - Provides a history for Entry widgets SYNOPSIS
package require Tcl 8.4 package require Tk 8.4 package require history ?0.1? ::history::init pathName ?length? ::history::remove pathName ::history::add pathName text ::history::get pathName ::history::clear pathName ::history::configure pathName option ?value? bell _________________________________________________________________ DESCRIPTION
This package provides a convenient history mechanism for Entry widgets. The history may be accessed with the up and down arrow keys. ::history::init pathName ?length? Arranges to remember the history of the named Entry widget. An optional length determines the number of history entries to keep. This may be changed later with ::history::configure. History entries must be added with the ::history::add command before they can be seen. ::history::remove pathName Forgets all history entries for the Entry pathName and removes the history bindings. ::history::add pathName text This command is used to add history entries to an Entry that has previously had ::history::init called on it. This command should be called from your Entry handler with the contents of the entry (or whatever you wish to add to the history). ::history::get pathName This command returns a list containing the history entries for the Entry pathName ::history::clear pathName This command clears the history list for the named Entry. ::history::configure pathName option ?value? This command queries or sets configuration options. Currently the options recognized are length and alert. Setting the length deter- mines the number of history entries to keep for the named Entry. Alert specifies the command to run when the user reaches the end of the history, it defaults to bell entry .e bind .e <Return> [list ProcessEntry %W] ::history::init .e pack .e proc ProcessEntry {w} { set text [$w get] if {$text == ""} { return } ::history::add $w $text puts $text $w delete 0 end } KEYWORDS
entry, history history 0.1 history(n)
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