.WAFtext/html Files in /etc/sysconfig on a Red Hat Linux 5.0 system


Files in /etc/sysconfig on a Red Hat Linux System

/etc/sysconfig/clock

deprecated values from earlier releases:
CLOCKMODE=GMT
indicates that the clock is set to UTC
CLOCKMODE=ARC
on alpha only indicates the ARC console's 42-year time offset is in effect
currently correct values:
UTC=true
indicates that the clock is set to UTC; anything else indicates that it is set to local time
ARC=true
on alpha only indicates the ARC console's 42-year time offset is in effect; otherwise the normal Unix epoch is assumed

/etc/sysconfig/keyboard

KEYTABLE=
for example: KEYTABLE="/usr/lib/kbd/keytables/us.map"

/etc/sysconfig/mouse

MOUSETYPE=type
where type is one of: microsoft mouseman mousesystems ps/2 msbm logibm atibm logitech mmseries mmhittab
XEMU3=yes|no
(emulate three buttons with two buttons whenever necessary, most notably in X)
In addition, /dev/mouse points to the mouse device.

/etc/sysconfig/network

NETWORKING=yes|no
HOSTNAME=fqdn by default, but whatever hostname you want
Note: for compatibility with some old software people might install (like trn), the /etc/HOSTNAME file should contain the same value as here.
FORWARD_IPV4=yes|no
(The current Red Hat Linux installation sets this to no by default for RFC compliance, but if FORWARD_IPV4 is not set at all, forwarding is enabled for compatibility with the configuration files used on Red Hat Linux versions 4.2 and earlier.)
GATEWAY=gateway IP
GATEWAYDEV=gateway device
(e.g. eth0)
NISDOMAIN=nis domain name

/etc/sysconfig/static-routes

Contains lines of the form: 
    device net network netmask netmask gw gateway
device is the device name for which to have the route brought up.

/etc/sysconfig/pcmcia

PCMCIA=yes|no
PCIC=i82365|tcic
PCIC_OPTS=socket driver (i82365 or tcic) timing parameters
CORE_OPTS=pcmcia_core options
CARDMGR_OPTS=cardmgr options

/etc/sysconfig/amd

ADIR=/.automount
(normally never changed)
MOUNTPTS='/net /etc/amd.conf'
(standard automount stuff)
AMDOPTS=
(extra options for AMD)

/etc/sysconfig/tape

DEV=/dev/nst0
Tape device. Use the non-rewinding one for these scripts. For SCSI tapes this is /dev/nst#, where # is the number of the tape drive you want to use. If you only have one then use nst0. For IDE tapes you use /dev/ht#, where # is the number of the tape drive you want to use (usually ht0). For floppy tape drives use /dev/ftape.
ADMIN=root
Person to mail to if the backup fails for any reason
SLEEP=5
Time to sleep between tape operations. Some drives need a bit more than others, but 5 seems to work for 8mm, 4mm, and DLT
BLOCKSIZE=32768
This worked fine for 8mm, then 4mm, and now DLT. An optimal setting is probably however much data your drive writes at one time.
SHORTDATE=$(date +%y:%m:%d:%H:%M)
A short date string, used in backup log filenames.
DAY=$(date +log-%y:%m:%d)
This is used for the log file directory.
DATE=$(date)
Regular date string, used in log files.
LOGROOT=/var/log/backup
Root of the logging directory
LIST=$LOGROOT/incremental-list
This is the file name the incremental backup will use to store the incremental list. It will be $LIST-some number.
DOTCOUNT=$LOGROOT/.count
For counting as you go to know which incremental list to use
COUNTER=$LOGROOT/counter-file
For rewinding when done...might not use.
BACKUPTAB=/etc/backuptab
The file in which we keep our list of backup(s) we want to make.

Files in /etc/sysconfig/network-scripts/

/etc/sysconfig/network-scripts/ifup

/etc/sysconfig/network-scripts/ifdown

Symlinks to /sbin/ifup and /sbin/ifdown, respectively. These are the only two scripts "in" this directory that should be called directly; these two scripts call all the other scripts as needed. These symlinks are here for legacy purposes only -- they'll will probably be removed in future versions, so only /sbin/ifup and /sbin/ifdown should currently be used. These scripts take one argument normally: the name of the device (e.g. eth0). They are called with a second argument of "boot" during the boot sequence so that devices that are not meant to be brought up on boot (ONBOOT=no, see below) can be ignored at that time.

/etc/sysconfig/network-scripts/network-functions

Not really a public file. Contains functions which the scripts use for bringing interfaces up and down. In particular, it contains most of the code for handling alternative interface configurations and interface change notification through netreport.

/etc/sysconfig/network-scripts/ifcfg-interfacename and /etc/sysconfig/network-scripts/ifcfg-interfacename-clonename

The first defines an interface, and the second contains only the parts of the definition that are different in a "clone" (or alternative) interface. For example, the network numbers might be different, but everything else might be the same, so only the network numbers would be in the clone file, but all the device information would be in the base ifcfg file. The items that can be defined in an ifcfg file depend on the interface type. The really obvious ones I'm not going to bother to define; you can figure out what IPADDR is, I think... :-)
Base items:
DEVICE=name
name of physical device (except dynamically-allocated PPP devices where it is the "logical name")
IPADDR=
NETMASK=
NETWORK=
BROADCAST=
GATEWAY=
ONBOOT=yes|no
USERCTL=yes|no
BOOTPROTO=none|bootp|dhcp
If BOOTPROTO is not none, then the only other item that must be set is the DEVICE item; all the rest will be determined by the boot protocol. No "dummy" entries need to be created.
PPP/SLIP items:
PERSIST=yes|no
MODEMPORT=device
say, /dev/modem
LINESPEED=speed
say, 115200>
DEFABORT=yes|no
tells netcfg whether or not to put default abort strings in when creating/editing the chat script and/or dip script for this interface
PPP-specific items:
DEFROUTE=yes|no
set this interface as default route?
ESCAPECHARS=yes|no
simplified interface here doesn't let people specify which characters to escape; almost everyone can use asyncmap 00000000 anyway, and they can set PPPOPTIONS to asyncmap foobar if they want to set options perfectly
HARDFLOWCTL=yes|no
(yes imples "modem crtscts" options)
PPPOPTIONS=arbitrary option string
placed last on the command line, so it can override other options like asyncmap that were specified differently
PAPNAME=papname
gives "name $PAPNAME" on pppd command line. Note that the "remotename" option is always specified as the logical ppp device name, like "ppp0" (which might perhaps be the physical device ppp1 if some other ppp device was brought up earlier...), which makes it easy to manage pap/chap files -- name/password pairs are associated with the logical ppp device name so that they can be managed together.
REMIP=remote ip address
normally unspecified
MTU=
MRU=
DISCONNECTTIMEOUT=number of seconds
default currently 5 (time to wait before re-establishing the connection after a successfully-connected session terminates before attempting to establish a new connection.)
RETRYTIMEOUT=number of seconds
default currently 60> (time to wait before re-attempting to establish a connection after a previous attempt fails.)

/etc/sysconfig/network-scripts/chat-

chat script for PPP or SLIP connection intended to establish the connection. For SLIP devices, a DIP script is written from the chat script; for PPP devices, the chat script is used directly.

/etc/sysconfig/network-scripts/dip-

A write-only script created from the chat script by netcfg. Do not modify this. In the future, this file may disappear by default and created on-the-fly from the chat script if it does not exist.

/etc/sysconfig/network-scripts/ifup-post

Called when any network device EXCEPT a SLIP device comes up. Calls /etc/sysconfig/network-scripts/ifup-routes to bring up static routes that depend on that device. Brings up aliases for that device. Sets the hostname if it is not already set and a hostname can be found for the IP for that device. Sends SIGIO to any programs that have requested notification of network events.

/etc/sysconfig/network-scripts/ifdhcpc-done

Called by dhcpcd once dhcp configuration is complete; sets up /etc/resolv.conf from the version dhcpcd dropped in /etc/dhcpc/resolv.conf


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