Global keywords and keyword/value Pairs
Global keywords and value pairs used in
image=/boot/vmlinuz-2.2.14-1.0: The kernel image to boot
label=linux: The label for a kernel image displayed at the LILO prompt
append="aha152x=0x340,11,7,1": Additional parameters to pass to LILO
root=/dev/hda6: The location of the root filesystem
other=/dev/hdb1: The location of an alternate operating system
Blank lines and comments beginning with a pound sign (#) are ignored. All other lines contain keyword/value pairs.
For example, the keyword MAIL_DIR is followed by some white space and the value
This tells useradd that the initial user e-mail mailbox is created in that directory. Following that are lines that enable you to customize the valid range of automatically assigned user ID numbers or group ID numbers. A comment section that explains that keyword's purpose precedes each keyword. Altering a default value is as simple as editing the value associated with that keyword and then saving the login.defs file. If you want to view the defaults, type the useradd command with the -D option as follows.
# useradd -D