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Chapter 18. The sysconfig Directory

18.1. Files in the /etc/sysconfig/ Directory
18.2. Directories in the /etc/sysconfig/ Directory
18.3. Additional Resources
The /etc/sysconfig/ directory contains a variety of system configuration files for Fedora.
This chapter outlines some of the files found in the /etc/sysconfig/ directory, their function, and their contents. The information in this chapter is not intended to be complete, as many of these files have a variety of options that are only used in very specific or rare circumstances.

18.1. Files in the /etc/sysconfig/ Directory

The following sections offer descriptions of files normally found in the /etc/sysconfig/ directory. Files not listed here, as well as extra file options, are found in the /usr/share/doc/initscripts-<version-number>/sysconfig.txt file (replace <version-number> with the version of the initscripts package). Alternatively, looking through the initscripts in the /etc/rc.d/ directory can prove helpful.

Note

If some of the files listed here are not present in the /etc/sysconfig/ directory, then the corresponding program may not be installed.

18.1.1.  /etc/sysconfig/arpwatch

The /etc/sysconfig/arpwatch file is used to pass arguments to the arpwatch daemon at boot time. The arpwatch daemon maintains a table of Ethernet MAC addresses and their IP address pairings. By default, this file sets the owner of the arpwatch process to the user pcap and sends any messages to the root mail queue. For more information regarding available parameters for this file, refer to the arpwatch man page.

18.1.2.  /etc/sysconfig/authconfig

The /etc/sysconfig/authconfig file sets the authorization to be used on the host. It contains one or more of the following lines:
  • PASSWORDALGORITHM=<value> , where <value> is one of the following:
    • descrypt — DESCRYPT is used for authentication.
    • bigcrypt — BIGCRYPT is used for authentication.
    • md5 — MD5 is used for authentication.
    • sha256 — SHA256 is used for authentication.
    • sha512 — SHA512 is used for authentication.
  • USEKERBEROS=<value> , where <value> is one of the following:
    • yes — Kerberos is used for authentication.
    • no — Kerberos is not used for authentication.
  • USELDAPAUTH=<value> , where <value> is one of the following:
    • yes — LDAP is used for authentication.
    • no — LDAP is not used for authentication.
  • FORCELEGACY=<value> , where <value> is one of the following:
    • yes — The implicit use of SSSD by the Authentication Configuration Tool is disabled.
    • no — The implicit use of SSSD by the Authentication Configuration Tool is enabled.

18.1.3.  /etc/sysconfig/autofs

The /etc/sysconfig/autofs file defines custom options for the automatic mounting of devices. This file controls the operation of the automount daemons, which automatically mount file systems when you use them and unmount them after a period of inactivity. File systems can include network file systems, CD-ROMs, diskettes, and other media.
The /etc/sysconfig/autofs file may contain the following:
  • LOCALOPTIONS="<value>", where <value> is a string for defining machine-specific automount rules. The default value is an empty string ("").
  • DAEMONOPTIONS="<value>", where <value> is the timeout length in seconds before unmounting the device. The default value is 60 seconds ("--timeout=60").
  • UNDERSCORETODOT=<value> , where <value> is a binary value that controls whether to convert underscores in file names into dots. For example, auto_home to auto.home and auto_mnt to auto.mnt. The default value is 1 (true).
  • DISABLE_DIRECT=<value> , where <value> is a binary value that controls whether to disable direct mount support, as the Linux implementation does not conform to the Sun Microsystems' automounter behavior. The default value is 1 (true), and allows for compatibility with the Sun automounter options specification syntax.

18.1.4.  /etc/sysconfig/clock

The /etc/sysconfig/clock file controls the interpretation of values read from the system hardware clock.
The correct values are:
  • UTC=<value> , where <value> is one of the following boolean values:
    • true or yes — The hardware clock is set to Universal Time.
    • false or no — The hardware clock is set to local time.
  • ARC=<value> , where <value> is the following:
    • false or no — This value indicates that the normal UNIX epoch is in use. Other values are used by systems not supported by Fedora.
  • SRM=<value> , where <value> is the following:
    • false or no — This value indicates that the normal UNIX epoch is in use. Other values are used by systems not supported by Fedora.
  • ZONE=<filename> — The time zone file under /usr/share/zoneinfo that /etc/localtime is a copy of. The file contains information such as:
    ZONE="America/New York"
    
    Note that the ZONE parameter is read by the Time and Date Properties Tool (system-config-date), and manually editing it does not change the system timezone.
Earlier releases of Fedora used the following values (which are deprecated):
  • CLOCKMODE=<value> , where <value> is one of the following:
    • GMT — The clock is set to Universal Time (Greenwich Mean Time).
    • ARC — The ARC console's 42-year time offset is in effect (for Alpha-based systems only).

18.1.5.  /etc/sysconfig/desktop

The /etc/sysconfig/desktop file specifies the desktop for new users and the display manager to run when entering runlevel 5.
Correct values are:
  • DESKTOP="<value>", where "<value>" is one of the following:
    • GNOME — Selects the GNOME desktop environment.
    • KDE — Selects the KDE desktop environment.
  • DISPLAYMANAGER="<value>", where "<value>" is one of the following:
    • GNOME — Selects the GNOME Display Manager.
    • KDE — Selects the KDE Display Manager.
    • XDM — Selects the X Display Manager.
For more information, refer to Chapter 21, The X Window System.

18.1.6.  /etc/sysconfig/dhcpd

The /etc/sysconfig/dhcpd file is used to pass arguments to the dhcpd daemon at boot time. The dhcpd daemon implements the Dynamic Host Configuration Protocol (DHCP) and the Internet Bootstrap Protocol (BOOTP). DHCP and BOOTP assign IP addresses and other configuration information to machines on the network. For more information about what parameters are available in this file, refer to the dhcpd man page.

18.1.7.  /etc/sysconfig/firstboot

The first time the system boots, the /sbin/init program calls the etc/rc.d/init.d/firstboot script, which in turn launches the Setup Agent. This application allows the user to install the latest updates as well as additional applications and documentation.
The /etc/sysconfig/firstboot file tells the Setup Agent application not to run on subsequent reboots. To run it the next time the system boots, remove /etc/sysconfig/firstboot and execute chkconfig --level 5 firstboot on.

18.1.8.  /etc/sysconfig/i18n

The /etc/sysconfig/i18n file sets the default language, any supported languages, and the default system font. For example:
LANG="en_US.UTF-8"
SUPPORTED="en_US.UTF-8:en_US:en"
SYSFONT="latarcyrheb-sun16"

18.1.9.  /etc/sysconfig/init

The /etc/sysconfig/init file controls how the system appears and functions during the boot process.
The following values may be used:
  • BOOTUP=<value> , where <value> is one of the following:
    • color — The standard color boot display, where the success or failure of devices and services starting up is shown in different colors.
    • verbose — An old style display which provides more information than purely a message of success or failure.
    • Anything else means a new display, but without ANSI-formatting.
  • RES_COL=<value> , where <value> is the number of the column of the screen to start status labels. The default is set to 60.
  • MOVE_TO_COL=<value> , where <value> moves the cursor to the value in the RES_COL line via the echo -en command.
  • SETCOLOR_SUCCESS=<value> , where <value> sets the success color via the echo -en command. The default color is set to green.
  • SETCOLOR_FAILURE=<value> , where <value> sets the failure color via the echo -en command. The default color is set to red.
  • SETCOLOR_WARNING=<value> , where <value> sets the warning color via the echo -en command. The default color is set to yellow.
  • SETCOLOR_NORMAL=<value> , where <value> resets the color to "normal" via the echo -en.
  • LOGLEVEL=<value> , where <value> sets the initial console logging level for the kernel. The default is 3; 8 means everything (including debugging), while 1 means only kernel panics. The rsyslog daemon overrides this setting once started.
  • PROMPT=<value> , where <value> is one of the following boolean values:
    • yes — Enables the key check for interactive mode.
    • no — Disables the key check for interactive mode.

18.1.10.  /etc/sysconfig/ip6tables-config

The /etc/sysconfig/ip6tables-config file stores information used by the kernel to set up IPv6 packet filtering at boot time or whenever the ip6tables service is started.
Do not modify this file by hand unless familiar with how to construct ip6tables rules. Rules also can be created manually using the /sbin/ip6tables command. Once created, add the rules to the /etc/sysconfig/ip6tables file by typing the following command:
/sbin/service ip6tables save
Once this file exists, any firewall rules saved in it persists through a system reboot or a service restart.
For more information on ip6tables, refer to .

18.1.11.  /etc/sysconfig/keyboard

The /etc/sysconfig/keyboard file controls the behavior of the keyboard. The following values may be used:
  • KEYBOARDTYPE="sun|pc" where sun means a Sun keyboard is attached on /dev/kbd, or pc means a PS/2 keyboard connected to a PS/2 port.
  • KEYTABLE="<file>", where <file> is the name of a keytable file.
    For example: KEYTABLE="us". The files that can be used as keytables start in /lib/kbd/keymaps/i386 and branch into different keyboard layouts from there, all labeled <file>.kmap.gz. The first file found beneath /lib/kbd/keymaps/i386 that matches the KEYTABLE setting is used.

18.1.12.  /etc/sysconfig/named

The /etc/sysconfig/named file is used to pass arguments to the named daemon at boot time. The named daemon is a Domain Name System (DNS) server which implements the Berkeley Internet Name Domain (BIND) version 9 distribution. This server maintains a table of which hostnames are associated with IP addresses on the network.
Currently, only the following values may be used:
  • ROOTDIR="</some/where>" , where </some/where> refers to the full directory path of a configured chroot environment under which named runs. This chroot environment must first be configured. Type info chroot for more information.
  • OPTIONS="<value>" , where <value> is any option listed in the man page for named except -t. In place of -t, use the ROOTDIR line above.
For more information about available parameters for this file, refer to the named man page. For detailed information on how to configure a BIND DNS server, refer to Chapter 7, The BIND DNS Server. By default, the file contains no parameters.

18.1.13.  /etc/sysconfig/network

The /etc/sysconfig/network file is used to specify information about the desired network configuration. The following values may be used:
  • NETWORKING=<value> , where <value> is one of the following boolean values:
    • yes — Networking should be configured.
    • no — Networking should not be configured.
  • HOSTNAME=<value> , where <value> should be the Fully Qualified Domain Name (FQDN), such as hostname.expample.com, but can be whatever hostname is necessary.
  • GATEWAY=<value> , where <value> is the IP address of the network's gateway.
  • GATEWAYDEV=<value> , where <value> is the gateway device, such as eth0. Configure this option if you have multiple interfaces on the same subnet, and require one of those interfaces to be the preferred route to the default gateway.
  • NISDOMAIN=<value> , where <value> is the NIS domain name.
  • NOZEROCONF=<value> , where setting <value> to true disables the zeroconf route.
    By default, the zeroconf route (169.254.0.0) is enabled when the system boots. For more information about zeroconf, refer to http://www.zeroconf.org/.

Warning

Do not use custom initscripts to configure network settings. When performing a post-boot network service restart, custom initscripts configuring network settings that are run outside of the network init script lead to unpredictable results.

18.1.14.  /etc/sysconfig/ntpd

The /etc/sysconfig/ntpd file is used to pass arguments to the ntpd daemon at boot time. The ntpd daemon sets and maintains the system clock to synchronize with an Internet standard time server. It implements version 4 of the Network Time Protocol (NTP). For more information about what parameters are available for this file, use a Web browser to view the following file: /usr/share/doc/ntp-<version>/ntpd.htm (where <version> is the version number of ntpd). By default, this file sets the owner of the ntpd process to the user ntp.

18.1.15.  /etc/sysconfig/radvd

The /etc/sysconfig/radvd file is used to pass arguments to the radvd daemon at boot time. The radvd daemon listens for router requests and sends router advertisements for the IP version 6 protocol. This service allows hosts on a network to dynamically change their default routers based on these router advertisements. For more information about available parameters for this file, refer to the radvd man page. By default, this file sets the owner of the radvd process to the user radvd.

18.1.16.  /etc/sysconfig/samba

The /etc/sysconfig/samba file is used to pass arguments to the smbd and the nmbd daemons at boot time. The smbd daemon offers file sharing connectivity for Windows clients on the network. The nmbd daemon offers NetBIOS over IP naming services. For more information about what parameters are available for this file, refer to the smbd man page. By default, this file sets smbd and nmbd to run in daemon mode.

18.1.17.  /etc/sysconfig/selinux

The /etc/sysconfig/selinux file contains the basic configuration options for SELinux. This file is a symbolic link to /etc/selinux/config.

18.1.18.  /etc/sysconfig/sendmail

The /etc/sysconfig/sendmail file allows messages to be sent to one or more clients, routing the messages over whatever networks are necessary. The file sets the default values for the Sendmail application to run. Its default values are set to run as a background daemon and to check its queue each hour in case something has backed up.
Values include:
  • DAEMON=<value> , where <value> is one of the following:
    • yesSendmail should be configured to listen to port 25 for incoming mail. yes implies the use of Sendmail's -bd options.
    • noSendmail should not be configured to listen to port 25 for incoming mail.
  • QUEUE=1h which is given to Sendmail as -q$QUEUE. The -q option is not given to Sendmail if /etc/sysconfig/sendmail exists and QUEUE is empty or undefined.

18.1.19.  /etc/sysconfig/spamassassin

The /etc/sysconfig/spamassassin file is used to pass arguments to the spamd daemon (a daemonized version of Spamassassin) at boot time. Spamassassin is an email spam filter application. For a list of available options, refer to the spamd man page. By default, it configures spamd to run in daemon mode, create user preferences, and auto-create whitelists (allowed bulk senders).
For more information about Spamassassin, refer to Section 13.5.2.6, “Spam Filters”.

18.1.20.  /etc/sysconfig/squid

The /etc/sysconfig/squid file is used to pass arguments to the squid daemon at boot time. The squid daemon is a proxy caching server for Web client applications. For more information on configuring a squid proxy server, use a Web browser to open the /usr/share/doc/squid-<version>/ directory (replace <version> with the squid version number installed on the system). By default, this file sets squid to start in daemon mode and sets the amount of time before it shuts itself down.

18.1.21.  /etc/sysconfig/system-config-users

The /etc/sysconfig/system-config-users file is the configuration file for the graphical application, User Manager. This file is used to filter out system users such as root, daemon, or lp. This file is edited by the Preferences > Filter system users and groups pull-down menu in the User Manager application and should never be edited by hand. For more information on using this application, refer to Section 22.1, “User and Group Configuration”.

18.1.22.  /etc/sysconfig/vncservers

The /etc/sysconfig/vncservers file configures the way the Virtual Network Computing (VNC) server starts up.
VNC is a remote display system which allows users to view the desktop environment not only on the machine where it is running but across different networks on a variety of architectures.
It may contain the following:
  • VNCSERVERS=<value> , where <value> is set to something like "1:fred", to indicate that a VNC server should be started for user fred on display :1. User fred must have set a VNC password using the vncpasswd command before attempting to connect to the remote VNC server.

18.1.23.  /etc/sysconfig/xinetd

The /etc/sysconfig/xinetd file is used to pass arguments to the xinetd daemon at boot time. The xinetd daemon starts programs that provide Internet services when a request to the port for that service is received. For more information about available parameters for this file, refer to the xinetd man page. For more information on the xinetd service, refer to .