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RAID (Redundant Array of Independent Disks)
     configuring
     RAID 1 (mirroring), creating
raidstart command
raidstop command
ranges (in regular expressions)
rawrite.exe command
rc script 2nd 3rd
rc.local script 2nd
rc.sysinit script 2nd 3rd 4th
rcp utility
rcS script 2nd
read comand
read permission 2nd
read-only directive
readers.conf file (INN)
     customizing newsgroups
readline
README files
ready-to-send (RTS) signals
rebooting
     init command, using
     shutdown command, using
     telinit command, using
recipes (Procmail)
     examples
records, DNS
recovery
     creating recovery disks
     planning
     system
         booting from rescue CD
         filesystem damage
         init or system initialization failure
         loss of key files
recursion, DNS server queries
recursive commands 2nd
     rm -r, -R
Red Hat Certified Engineer (RHCE) program
Red Hat Linux
     configuring as DHCP client
     creating boot disk
     dial-up connection configuration
     initrd and /linuxrc file
     keeping up to date
     mkinitrd
     netconfig tool
     network configuration, PCMCIA devices
     network interface configuration files
     PCMCIA support
     runlevels, customizing
     security information
     system initialization techniques
     system runlevel directories
redirection 2nd 3rd
     HTTP requests for Apache
     shell script results
redirection operators 2nd
registrars, domain name
registration, domain names
regular expressions 2nd 3rd
     awk program
    egrep command
         extracting lines from system logs
     examples
         anchors
         groups and ranges
         modifiers
         patterns
         sed (stream editor)
     grep command
         extracting lines from system logs
     mod_rewrite Apache module
         catch-all regular expression
     Perl
     sed (stream editor)
         removing nonmatching lines
     syntax
ReiserFS
relay, DHCP
relaying email
     checking for open relays
     open relays used by spammers
relays, DHCP
reminder messages (Majordomo)
remote printers, configuring 2nd
remote X clients 2nd
remove directive, modules.conf
removing directories
renaming files and directories
renice command 2nd
repquota command 2nd
resize2fs command 2nd
resolution (monitors)
resolv.conf file 2nd 3rd
     local system, setting as default DNS server
resolver (DNS) 2nd
resources
     .Xresources file 2nd
     assignment of 2nd
     modems
     setting limits on use of
     troubleshooting system resources
         editors
         environment variables and shells
    troubleshooting sytem resources
         shell environment
restoring
     files from tar archive
return command
return values
reverse DNS
     files
     on IP addresses assigned by ISP
     zone entry
reverse DNS file
rewinding tapes
rhosts authentication
rm command 2nd
rmdir command 2nd
rmmod command 2nd 3rd
root account
root directive
root name servers, hints for finding
root user
     monitoring use of account
     remote, NFS server configuration
round robin buffer
route commands 2nd 3rd 4th
     checking dial-up network connections
     checking routing information
routed
routers
     failure of
     relaying DHCP requests
routing
     checking with netstat and route
     configuring a router
         example networks
         firewall rule sets
         firewalling, miscellaneous issues
         getting routing working
         ipchains, using
         iptables, using
     configuring IP routing for dial-up connection
     dynamic
RPC daemons, NSF-related
RPC portmapper
rpc.lockd file
rpc.statd file
rpcinfo command
rpcinfo utility
RPM (Red Hat Package Manager) 2nd 3rd
     building packages
     modifying packages
     package verification
     packages, overview
     rpm command
     running rpm
     verifying packages 2nd
         checking before installation
         verification codes
rpm command
     running
rpmbuild command
     rebuilding RPM source package for other Linux systems
rsync utility 2nd
     common options
RTS (ready-to-send) signals
rules file (Debian packages) 2nd
runlevels 2nd
     boot process troubleshooting
     changing with init and telinit
     customizing
         Debian-based systems
         Red Hat and related distributions
     default
     determining system runlevel
     init process and /etc directory tree, overview
     runlevel 1
     runlevel command 2nd
     setting default
     single-user 2nd
     system runlevel directories on Red Hat
     typical, summary of