05-24-2010
Helpful hints:
Always have a working backup of your boot volume,
Learn basics about navigation (cd, pwd,..),
Know your directory structure (ls -al /),
Learn about posix permissions (user, group, other [aka world]),
Learn how to change ownership and permissions (chown, chmod) and most importantly - the ramifications of making such changes,
There is no undo in unix. Pay attention to the possible effects of the command/s you might issue,
Also, there are Mac specific commands that you will become familiar with over time, but you will need to ask lots of questions along your journey.
Oooo. Beginners should be very careful about any "recursive" commands.
chown or chmod a single file or folder and it's easily undone. chown or chmod recursively can cause a world of hurt. Remember the first hint!
This site has stuff "for dummies" and up, so don't be afraid to try some of the non-system related stuff on test files and folders. See hints 2 and 3.
Good hunting!
This User Gave Thanks to [MA]Flying_Meat For This Post:
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LEARN ABOUT PHP
logindevperm
logindevperm(4) File Formats logindevperm(4)
NAME
logindevperm, fbtab - login-based device permissions
SYNOPSIS
/etc/logindevperm
DESCRIPTION
The /etc/logindevperm file contains information that is used by login(1) and ttymon(1M) to change the owner, group, and permissions of
devices upon logging into or out of a console device. By default, this file contains lines for the keyboard, mouse, audio, and frame buffer
devices.
The owner of the devices listed in /etc/logindevperm is set to the owner of the console by login(1). The group of the devices is set to the
owner's group specified in /etc/passwd. The permissions are set as specified in /etc/logindevperm.
Fields are separated by TAB and/or SPACE characters. Blank lines and comments can appear anywhere in the file; comments start with a hash-
mark, ` # ', and continue to the end of the line.
The first field specifies the name of a console device (for example, /dev/console). The second field specifies the permissions to which the
devices in the device_list field (third field) will be set. These permissions must be expressed in octal format. For example, O774. A
device_list is a colon-separated list of device names. Note that a device name must be a /dev link. A device entry that is a directory
name and ends with "/*" specifies all entries in the directory (except "." and ".."). For example, "/dev/fbs/*" specifies all frame buffer
devices.
Once the devices are owned by the user, their permissions and ownership can be changed using chmod(1) and chown(1), as with any other user-
owned file.
Upon logout the owner and group of these devices will be reset by ttymon(1M) to owner root and root's group as specified in /etc/passwd
(typically other). The permissions are set as specified in the /etc/logindevperm file.
FILES
/etc/passwd File that contains user group information.
SEE ALSO
chmod(1), chown(1), login(1), ttymon(1M), passwd(4)
NOTES
/etc/logindevperm provides a superset of the functionality provided by /etc/fbtab in SunOS 4.x releases.
SunOS 5.10 22 Oct 2003 logindevperm(4)