List of the most popular configuration files and
brief description
Configuration File Description
/boot
/boot/grub GRUB bootloader file
/boot/grub/menu.list boot menu
/boot/System.map Linux kernel map
/boot/vmlinuz Linux kernel
/etc
/etc/apache2/httpd.conf Apache web server configuration file
(Debian)
/etc/apt/sources.list lists the sources from which the APT obtains
packages(Debian & Ubuntu)
/etc/at.allow users allowed to use the at command to
schedule jobs
/etc/at.deny users forbidden to use the at command
/etc/bashrc functions and aliases for bash shell
(Fedora)
/etc/bash.bashrc functions and aliases for bash shell
(Debian, SUSE & Ubuntu)
/etc/cups/cupsd.conf The CPUS scheduler
/etc/fonts/local.conf font configuration file
/etc/fstab Information about the various file system and mount
/etc/group Information about groups
/etc/grub.conf GRUB bootloader
(Fedora& SUSE)
/etc/hosts IP address and their hostnames
/etc/hosts.allow Hosts allowed to access internet service
/etc/hosss.deny hosts forbidden to access internet services
/etc/httpd/conf/httpd.conf Apache web server configuration file
(Fedora)
/etc/init.d Directory with scripts to start and stop various servers
/etc/init.d/rcS Linux initialization script
(Debian, SUSE & Ubuntu)
/etc/inittab The init process that starts all the other processes
/etc/issue Distribution name and the version number
/etc/lilo.conf Linux Loader(LILO) configuration file
/etc/login.defs Default information for creating user accounts
/etc/modules.conf Configuration file for loadable kernel module
(Debian)
/etc/mtab Information about the currently mounted file systems
/etc/passwd Information about all user accounts
/etc/profile Systemwide environment and startup file for the bash sell
/etc/profile.d Directory containing file that the /etc/profile script executes
/etc/rc.d/rc.sysinit Linux initialization script
(Fedora)
/etc/shadow Secure file with encrypted passwords for all user accounts
/etc/shells List of all the shells on the system that the user can use
/etc/skel Directory that holds .bash_logout, .bash_profile, .bashrc files
/etc/sysconfig Linux configuration files
(Fedora & SUSE)
/etc/sysctl.conf Configuration file with kernel parameters
/etc/termcap Database of terminal capabilities and options
(Fedora & SUSE)
/etc/udev Directory containing configuration files for udev
/etc/X11 Directory with configuration files for X Window
System
/etc/X11/xorg.conf Configuration file for X.Org X11 the X Window System
(Fedora, Ubuntu & SUSE)
/etc/xinetd.conf Configuration for the xinetd daemon that starts internet
service on demand
/etc/yum.conf Configuration for the Yum package updater and installer
(Fedora)
/var
/var/log/apache2 Web-server access and error logs
(Debian)
/var/log/cron Log file with messages from the cron process that runs
scheduled jobs
/var/log/boot.msg File with boot messages(SUSE)
/var/log/dmesg File with boot messages
(Debian, Fedora & Ubuntu)
/var/log/httpd Web-server access and error logs(Fedora)
/var/log/message System log
APT - Advanced Packaging Tool
CPUS - Common Unix Printing System
Configuration File Description
/boot
/boot/grub GRUB bootloader file
/boot/grub/menu.list boot menu
/boot/System.map Linux kernel map
/boot/vmlinuz Linux kernel
/etc
/etc/apache2/httpd.conf Apache web server configuration file
(Debian)
/etc/apt/sources.list lists the sources from which the APT obtains
packages(Debian & Ubuntu)
/etc/at.allow users allowed to use the at command to
schedule jobs
/etc/at.deny users forbidden to use the at command
/etc/bashrc functions and aliases for bash shell
(Fedora)
/etc/bash.bashrc functions and aliases for bash shell
(Debian, SUSE & Ubuntu)
/etc/cups/cupsd.conf The CPUS scheduler
/etc/fonts/local.conf font configuration file
/etc/fstab Information about the various file system and mount
/etc/group Information about groups
/etc/grub.conf GRUB bootloader
(Fedora& SUSE)
/etc/hosts IP address and their hostnames
/etc/hosts.allow Hosts allowed to access internet service
/etc/hosss.deny hosts forbidden to access internet services
/etc/httpd/conf/httpd.conf Apache web server configuration file
(Fedora)
/etc/init.d Directory with scripts to start and stop various servers
/etc/init.d/rcS Linux initialization script
(Debian, SUSE & Ubuntu)
/etc/inittab The init process that starts all the other processes
/etc/issue Distribution name and the version number
/etc/lilo.conf Linux Loader(LILO) configuration file
/etc/login.defs Default information for creating user accounts
/etc/modules.conf Configuration file for loadable kernel module
(Debian)
/etc/mtab Information about the currently mounted file systems
/etc/passwd Information about all user accounts
/etc/profile Systemwide environment and startup file for the bash sell
/etc/profile.d Directory containing file that the /etc/profile script executes
/etc/rc.d/rc.sysinit Linux initialization script
(Fedora)
/etc/shadow Secure file with encrypted passwords for all user accounts
/etc/shells List of all the shells on the system that the user can use
/etc/skel Directory that holds .bash_logout, .bash_profile, .bashrc files
/etc/sysconfig Linux configuration files
(Fedora & SUSE)
/etc/sysctl.conf Configuration file with kernel parameters
/etc/termcap Database of terminal capabilities and options
(Fedora & SUSE)
/etc/udev Directory containing configuration files for udev
/etc/X11 Directory with configuration files for X Window
System
/etc/X11/xorg.conf Configuration file for X.Org X11 the X Window System
(Fedora, Ubuntu & SUSE)
/etc/xinetd.conf Configuration for the xinetd daemon that starts internet
service on demand
/etc/yum.conf Configuration for the Yum package updater and installer
(Fedora)
/var
/var/log/apache2 Web-server access and error logs
(Debian)
/var/log/cron Log file with messages from the cron process that runs
scheduled jobs
/var/log/boot.msg File with boot messages(SUSE)
/var/log/dmesg File with boot messages
(Debian, Fedora & Ubuntu)
/var/log/httpd Web-server access and error logs(Fedora)
/var/log/message System log
APT - Advanced Packaging Tool
CPUS - Common Unix Printing System
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