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Appendix B. Principal Linux Files

Appendix B. Principal Linux Files

Table B-1 describes the principal Linux files. You can use it, for example, to help you locate configuration files quickly.

Table B-1. Principal Linux files
File(s) Description
/boot/grub/grub.conf GRUB configuration file
/boot/module-info-* Module information for the Linux kernel
/boot/System.map-* Map of the Linux kernel
/boot/vmlinuz-* Linux kernel
/etc/aliases Mail aliases
/etc/at.deny User IDs of users forbidden to use the at command
/etc/auto.master Configuration file for the autofs daemon, which automatically mounts filesystems
/etc/auto.misc Automounter map file
/etc/bashrc Systemwide functions and aliases for the bash shell
/etc/cron.daily/* Daily cron jobs
/etc/cron.hourly/* Hourly cron jobs
/etc/cron.monthly/* Monthly cron jobs
/etc/cron.weekly/* Weekly cron jobs
/etc/crontab System cron file
/etc/cups/* Printer configuration files
/etc/default/useradd Defaults for the useradd command
/etc/DIR_COLORS Directory listing colors
/etc/exports NFS exported directories
/etc/filesystems Supported filesystem types
/etc/fstab Filesystems mounted or available for mounting
/etc/group System group definitions
/etc/host.conf Resolver configuration file
/etc/hosts Map of IP numbers to hostnames
/etc/hosts.allow Hosts allowed to access Internet services
/etc/hosts.deny Hosts forbidden to access Internet services
/etc/httpd/conf/* Apache configuration files
/etc/httpd/httpd.conf Main Apache configuration file
/etc/init.d/* SysV initialization scripts
/etc/initlog.conf Logging configuration file
/etc/inittab Configuration for the init daemon, which controls executing processes
/etc/issue Linux kernel and distribution version (local users)
/etc/issue/net Linux kernel and distribution version (remote users)
/etc/ld.so.conf Shared library configuration file
/etc/login.defs Options for useradd and related commands
/etc/logrotate.conf Log rotation configuration file
/etc/logrotate.d/* Scripts to rotate logs
/etc/mail/* Mail server configuration files
/etc/mailcap metamail MIME information
/etc/man.config man configuration file
/etc/mime.types MIME types
/etc/mime-magic* Magic numbers for MIME data
/etc/minicom.users User IDs allowed to use minicom
/etc/modules.conf Aliases and options for loadable kernel modules
/etc/motd Message of the day
/etc/mtab Mounted filesystems
/etc/nsswitch.conf Resolver configuration file
/etc/openldap/* Open LDAP configuration files
/etc/pam.d/* PAM configuration files
/etc/paper.config Paper sizes
/etc/passwd User account information
/etc/ppp/* PPP configuration
/etc/printcap Printer options and capabilities
/etc/profile Default environment for users of the bash shell
/etc/profile.d/* Shell initialization
/etc/protocols Protocol names and numbers
/etc/pwdb.conf pwdb library configuration
/etc/rc Scripts for system and process startup and shutdown
/etc/rc.local Local startup script
/etc/rc.sysinit System initialization file
/etc/rc?.d/* Service start/stop scripts
/etc/rpc RPC program number database
/etc/rpm/* RPM database and configuration files
/etc/samba/* Samba configuration files
/etc/securetty Secure tty configuration
/etc/security/* PAM configuration files
/etc/sensors.conf libsensors configuration file
/etc/services Standard service names and numbers
/etc/shadow Secure user account information
/etc/skel Skeleton files used to establish new user accounts
/etc/ssh/* SSH configuration files
/etc/sysconfig/* System configuration files
/etc/sysconfig/network-scripts/* Network adapter configuration files
/etc/sysctl.conf sysctl configuration file
/etc/syslog.conf System logging process configuration
/etc/termcap Terminal capabilities and options
/etc/updatedb.conf updatedb/locate configuration file
/etc/wvdial.conf GNOME dialer configuration file
/etc/X11/applnk/* X application shortcuts
/etc/X11/fs/config X font server configuration
/etc/X11/gdm/* GNOME display manager configuration
/etc/X11/prefdm Display manager configuration file
/etc/X11/xdm/* X display manager configuration file
/etc/X11/XF86Config X configuration file
/etc/X11/xinit/Xclients Default script for xinit
/etc/X11/xinit/xinitrc X session initialization file
/etc/X11/Xmodmap Key mappings used by xdm and xinit
/etc/xinetd.conf General xinetd configuration file
/etc/xinetd.d/* xinetd configuration files for specific servers
/home/*/public_html User web pages
/root/.bash_history bash command history for system administrator
/root/.bash_logout bash logout script for system administrator
/root/.bash_profile bash initialization script for system administrator
/root/.bashrc bash options for system administrator
/root/.Xresources X resources for system administrator
/usr/share/config/* Miscellaneous configuration files
/usr/share/fonts/* Fonts
/usr/share/ssl/openssl.cnf SSL certificate configuration
/usr/X11R6/lib/X11/app-defaults/* X application defaults
/usr/X11R6/lib/X11/fonts/* X fonts
/var/log/cron Log of cron activity
/var/log/httpd/access_log Log of web server access
/var/log/httpd/error_log Log of web server errors
/var/log/boot.log Boot messages
/var/log/cron Cron log
/var/log/dmesg Kernel message log
/var/log/lastlog Last login log
/var/log/maillog Mail transfer log
/var/log/messages System log
/var/log/samba/* Samba logs
/var/log/secure System security log
/var/log/up2date Up2date log
/var/www/cgi-bin CGI scripts
/var/www/html/* Web pages



  

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