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Representative list of Linux files

Table below is by no means intended to be an exhaustive list of Linux system files; however, it is a good representation to give some insight into the inner workings of Linux.




The Linux kernel file.  File naming conventions may include release information


Device file for the first floppy disk drive on the system


Device driver for the first floppy drive in high density mode, commonly invoked when formatting a floppy diskette for that density


Device file for the first IDE hard drive on the system


Commonly, the IDE CDROM drive device file which often is a symbolic link called to /dev/cdrom, the real CDROM driver file.


A dummy device which contains nothing.  It is sometimes useful to send output to this device to make it go away forever.


Contains aliases used by sendmail and other mail transport agents. Whenever this file is changed, the newaliases utility must be run to notify sendmail of the changes


Contains global defaults and aliases used by the bash shell


A parent shell script to run commands periodically.  It invokes hourly, daily, weekly, and monthly scripts.


Contains a list of filesystems which may be made available to other systems on the network via NFS.


The file system table contains the description of what disk devices are available at what mount points.


Holds information regarding security group definitions.


The grub boot loader configuration file


Contains host names and their corresponding IP addresses used for name resolution whenever a DNS server is unavailable


Contains a list of hosts allowed to access services on this computer.


Contains a list of hosts forbidden to access services on this computer.


Describes how the INIT process should set up the system in various runlevels


Contains the pre-login message, often overwritten by the /etc/rc.d/rc.local script in Red Hat and some other rpm-based Linux distributions


The lilo boot loader configuration file


Holds options for configurable system modules


This is the ”message of the day” file which is printed upon login. It can be overwritten by /etc/rc.d/rc.local Red Hat on startup.


Status information for currently mounted devices and partitions


Contains information regarding registered system users. Passwords are typically kept in a shadow file for better security.


Holds printer setup information


Contains global defaults for the bash shell


A list of domain name servers (DNS) used by the local machine


This file contains a list of terminals where root can login


An extensive ASCII text file defining the properties of consoles, terminals, and printers


Contains CPU related information


Holds information regarding filesystems that are currently in use


Stores the interrupts that are currently being used


A list of the I/O addresses used by devices connected to the server


Contains memory usage information for both physical memory and swap


Lists currently loaded kernel modules


Displays currently mounted file systems


Contains various statistics about the system, such as the number of page faults since the system was last booted


Holds swap file utilization information


Contains Linux version information


Stores information about the last boot process


Contains messages produced by the syslog daemon during the boot process


A binary data file holding login time and duration for each user currently on the system

Category: Unix/Linux | Added by: Gaby (2008-10-27) | Author: gaby weeb
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