Linux File Formats/etc/crontab
The syntax of each line in this file is: minute, hour, day of month, Month, day of week, (user name), command.
/etc/fstab
Columns are: device file to mount, directory to mount on, filesystem type, options, backup frequency, and fsck pass number (To specify the order in which filesystems should be checked on boot; 0 means no check.) The noauto option stops this mount from being done automatically on boot.
/etc/hosts
Sets up host address information for local use. The format is: IPaddress name1 name2...
/etc/inittab
Sets the init configuration. An entry in the inittab file has the following format: id: runlevels: action: process
/etc/passwd
The file has one line per username, and is divided into seven colondelimited fields:
1. Username.
2. Password, in an encrypted form.
3. Numeric user id.
4. Numeric group id.
5. Full name or other description of account. This is called gecos.
6. The user's home directory.
7. The user's login shell (program to run at login).
/usr/X11R6/lib/X11/XF86Config
The main XFree86 configuration file.
