|(slightly skeptical) Educational society promoting "Back to basics" movement against IT overcomplexity and bastardization of classic Unix
/etc/profile System wide environment and startup script program.
/dev/MAKEDEV The /dev/MAKEDEV file is a script written by the system administrator that creates local only device files or links such as device files for a non-standard device driver.
/etc/aliases Where the user's name is matched to a nickname for e-mail.
/etc/bootptab The configuration for the BOOTP server daemon.
/etc/crontab Lists commands and times to run them for the cron deamon.
/etc/dhcpd.conf The configuration file for the DHCP server daemon.
/etc/ethers File for RARP mapping from hardware addresses to IP addresses. See the man page ethers(5).
/etc/exports The file describing exported filesystems for NFS services.
/etc/fdprm The floppy disk parameter table. Describes the formats of different floppy disks. Used by setfdprm.
/etc/filesystems Can be used to set the filesystem probe order when filesystems are mounted with the auto option. The nodev parameter is specified for filesystems that are not really locally mounted systems such as proc, devpts, and nfs systems.
/etc/fstab Lists the filesystems mounted automatically at startup by the mount -a command (in /etc/rc or equivalent startup file).
/etc/group Similar to /etc/passwd but for groups rather than users.
/etc/groups May contain passwords that let a user join a group.
/etc/gshadow Used to hold the group password and group administrator password information for shadow passwords.
/etc/host.conf Specifies how host names are resolved.
/etc/hosts List hosts for name lookup use that are locally required.
/etc/HOSTNAME Shows the host name of this host. Used for support of older programs since the hostname is stored in the /etc/sysconfig/network file.
/etc/inittab Configuration file for init, controls startup run levels, determines scripts to start with.
/etc/inetd.conf Sets up the services that run under the inetd daemon.
/etc/issue Output by getty before the login prompt. Description or welcoming message.
/etc/issue.net Output for network logins with LINUX version
/etc/ld.so.conf Configuration file for ld.so, the run time linker.
/etc/limits Limits users resources when a system has shadow passwords installed.
/etc/localtime In Debian the system time zone is determined by this link.
/etc/login.defs Sets user login features on systems with shadow passwords.
/etc/logrotate.conf Configures the logrotate program used for managing logfiles.
/etc/magic The configuration file for file types. Contains the descriptions of various file formats for the file command.
/etc/motd The message of the day, automatically output by a successful login.
/etc/mtab A list of currently mounted file systems. Setup by boot scripts and updated by the mount command.
/etc/named.conf Used for domain name servers.
/etc/networks Lists names and addresses of your own and other networks, used by the route command.
/etc/nologin If this file exists, non-root logins are disabled. Typically it is created when the system is shutting down.
/etc/nsswitch.conf Name service switch configuration file.
/etc/passwd The user database with fields giving the username, real name, home directory, encrypted password and other information about each user.
/etc/printcap A configuration file for printers.
/etc/profile -- file sourced at the begeggin of each shell session
/etc/protocols Describes DARPA internet protocols available from the TCP/IP subsystem. Maps protocol ID numbers to protocol names. /etc/rc or /etc/rc.d or /etc/rc?.d Scripts or directories of scripts to run at startup or when changing run level.
/etc/rc.d/rc0.d Contains files used to control run level 0. Usually these files are softlink files.
/etc/rc.d/rc1.d Contains files to control run level 1. Scripts beginning with an S are for start, K for kill.
/etc/rc.d/rc.sysinit Init runs this when it starts.
/etc/resolv.conf Configures the name resolver, specifying the address of your name server and your domain name.
/etc/securetty Identifies secure terminals from which root is allowed to log in.
/etc/services Lists the network services that the system supports.
/etc/shadow Shadow password file on systems with shadow password software installed. Shadow passwords move the encrypted password files from /etc/passwd to /etc/shadow which can only be read by root.
/etc/shadow.group Systems with shadow passwords may have this file.
/etc/shells Lists trusted shells. The chsh command allows users to change their login shell to shells listed only in this file.
/etc/skel/.profile Can be used by administrator to set the editor environment variable to some editor that is friendly to new users.
/etc/sudoers A list of users with special privileges along with the commands they can execute.
/etc/smb.conf The configuration file for setting up Samba services.
/etc/sysconfig/amd Used to configure the auto mount daemon.
/etc/sysconfig/clock Used to configure the system clock to Universal or local time and set some other clock parameters.
/etc/sysconfig/i18n Controls the system font settings.
/etc/sysconfig/init This file is used to set some terminal characteristics and environment variables.
/etc/sysconfig/keyboard Used to configure the keyboard.
/etc/sysconfig/mouse This file is used to configure the mouse.
/etc/sysconfig/network-scripts/ifcfg-interface Defines a network interface.
/etc/sysconfig/pcmcia Used to configure pcmcia network cards.
/etc/sysconfig//routed Sets up dynamic routing policies.
/etc/sysconfig/static-routes Configures static routes on a network.
/etc/sysconfig/tape Used for backup tape device configuration.
/etc/X11/XF86Config The configuration file for the X server.
/etc/syslog.conf Configuration file for the syslogd daemon.
/etc/termcap The terminal capability database. Describes by what "escape sequences" various terminals can be controlled. See terminfo, termcap, curs_termcap man pages.
/etc/terminfo Details for terminal I/O.
/etc/usertty This file is used to impose special access restrictions on users.
$HOME/.bashrc User aliases, path modifier, and functions.
$HOME/.bash_profile Users environment stuff and startup programs.
$HOME/.bash_logout User actions to be done at logout.
$HOME/.hushlogin When this file exists in the user's home directory, it will prevent check for mail, printing of the last login time, and the message of the day when the user logs in.
$HOME/.inputrc Contains keybindings and other bits.
$HOME/Xrootenv.0 Has networking and environment info.
/proc/cpuinfo Information about the processor such as its type, make and performance.
/proc/devices A list of devices configured into the currently running kernel.
/proc/dma Shows which DMA channels are being used at the moment.
/proc/filesystems Filesystems that are configured into the kernel. The file used to detect filesystems if the /etc/filesystems does not exist.
/proc/ioports Shows which I/O ports are in use at the moment.
/proc/interrupts Shows which interrupts are in use and how many of each there have been.
/proc/kcore An image of the physical memory of the system.
/proc/kmsg Messages output by the kernel. These are also routed to syslog.
/proc/ksyms Symbol table for the kernel.
/proc/loadavg The load average of the system.
/proc/meminfo Information about memory usage, both physical and swap.
/proc/modules Which kernel modules are currently loaded.
/proc/mounts Contains information on filesystems currently mounted, similar to /etc/mtab
/proc/net Contains status information about network protocols.
/proc/self A symbolic link to the process directory of the program that is looking at /proc. When 2 process look at proc, they get different links.
/proc/stat Various statistics about the system such as the number of page faults since the system was booted.
/proc/uptime The time the system has been up.
/proc/version The kernel version.
/usr/lib/zoneinfo Time zone datafiles are stored here on the Debian system
/var/log/lastlog Used by finger to tell when a user was last logged in.
/var/log/wtmp Binary info on users that have been logged on. The last command uses this info.
/var/run/utmp Contains information about users currently logged in. Who and w commands use this file.
/var/named/root.hints Used for domain name server. Placed here optionally, but this is the normal location.
/var/named/* Files used by domain name server. Placed here optionally, but this is the normal location.
/var/log/btmp Used to store information about failed logins. This file must be first created to activate it.
/var/log/lastlog Contains information about the last time a login was done on the system. Works with lastb(1).
/var/log/maillog The normal system mail log file.
/var/log/messages The main system message log file.
var/log/secure System tracking of user logins. Check this file periodically.
/var/spool/mail Where mailboxes are usually stored.
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Last modified: March 12, 2019