{"id":22239,"date":"2016-05-26T03:01:28","date_gmt":"2016-05-25T17:01:28","guid":{"rendered":"http:\/\/www.rjmprogramming.com.au\/ITblog\/?p=22239"},"modified":"2016-06-19T21:04:45","modified_gmt":"2016-06-19T11:04:45","slug":"mac-os-x-users-and-groups-primer-tutorial","status":"publish","type":"post","link":"https:\/\/www.rjmprogramming.com.au\/ITblog\/mac-os-x-users-and-groups-primer-tutorial\/","title":{"rendered":"Mac OS X Users and Groups Primer Tutorial"},"content":{"rendered":"
\"Mac<\/a>

Mac OS X Users and Groups Primer Tutorial<\/p><\/div>\n

Underpinning a Mac OS X MacBook Pro laptop’s workings is a Linux or Unix-like BSD operating system. This operating system, like a lot of others, uses files that have permissions and ownership.<\/p>\n

If you have file permissions they are for …<\/p>\n

    \n
  1. read<\/li>\n
  2. write<\/li>\n
  3. execute<\/li>\n<\/ol>\n

    … with respect to the file access right categories …<\/p>\n

      \n
    1. system<\/li>\n
    2. owner<\/li>\n
    3. group<\/li>\n
    4. world<\/li>\n<\/ol>\n

      … and so you have command line commands …<\/p>\n

        \n

      1. \nNAME
        \n chown -- change file owner and group<\/p>\n

        SYNOPSIS
        \n chown [-fhv] [-R [-H | -L | -P]] owner[:group] file ...
        \n chown [-fhv] [-R [-H | -L | -P]] :group file ...
        \n<\/code><\/li>\n


      2. \nNAME
        \n chgrp -- change group<\/p>\n

        SYNOPSIS
        \n chgrp [-fhv] [-R [-H | -L | -P]] group file ...
        \n<\/code><\/li>\n


      3. \nNAME
        \n chmod -- change file modes or Access Control Lists<\/p>\n

        SYNOPSIS
        \n chmod [-fv] [-R [-H | -L | -P]] mode file ...
        \n chmod [-fv] [-R [-H | -L | -P]] [-a | +a | =a] ACE file ...
        \n chmod [-fhv] [-R [-H | -L | -P]] [-E] file ...
        \n chmod [-fhv] [-R [-H | -L | -P]] [-C] file ...
        \n chmod [-fhv] [-R [-H | -L | -P]] [-N] file ...
        \n<\/code><\/li>\n<\/ol>\n

        … to help control how files are accessed by users and their underlying group “membership”.<\/p>\n

        So, what about create Users and Groups in the first place with Mac OS X? Well, you can do it using the command line, but in this case we think to use the Mac OS X Apple -> System Preferences -> Users and Groups GUI interface, as much as anything, because you can visualize the relationships better in a GUI arrangement, for this.<\/p>\n

        So for today’s tutorial picture<\/a> example we, that being the administrator user ‘pgAgent’, create …<\/p>\n