unit 9 basic system configuration tools
DESCRIPTION
TRANSCRIPT
![Page 1: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/1.jpg)
RedHat Enterprise Linux Essential
Unit 9: Basic System Configuration Tools
![Page 2: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/2.jpg)
Objectives
Upon completion of this unit, you should be able to:
Configure date, network and printer settings
Send text to the printer
Set the system's date and time
![Page 3: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/3.jpg)
TCP/IP Network Configuration
Important network settings:
IP Configuration
Device Activation
DNS Configuration
Default Gateway
![Page 4: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/4.jpg)
Managing Ethernet Connections
Network interfaces are named sequentially: eth0, eth1,
etc
Multiple addresses can be assigned to a device with aliases
Aliases are labeled eth0:1, eth0:2, etc.
Aliases are treated like separate interfaces
View interface configuration with ifconfig
ifconfig ; ifconfig –a ; ifconfig eth0
Enable interface with ifup ethX [ifconfig ethX up]
Disable interface with ifdown ethX [ifconfig ethX down]
![Page 5: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/5.jpg)
Graphical Network Configurationsystem-config-network
System->Administration->Network
Activate/Deactivate interfaces
Assign IP Addresses/DHCP
Modify DNS settings
Modify gateway address
![Page 6: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/6.jpg)
Network Configuration FilesEthernet Devices
Device configuration is stored in text files
/etc/sysconfig/network-scripts/ifcfg-ethX
syntax: variable=value
Complete list of options in /usr/share/doc/initscripts-*/sysconfig.txt
Dynamic Configuration Static Configuration
DEVICE=ethXHWADDR=0:02:8A:A6:30:45BOOTPROTO=dhcpONBOOT=yesType=Ethernet
DEVICE=ethXHWADDR=0:02:8A:A6:30:45IPADDR=192.168.0.254NETMASK=255.255.255.0GATEWAY=192.168.2.254ONBOOT=yesType=Ethernet
![Page 7: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/7.jpg)
Network Configuration FilesOther Global Network Settings
Global Settings in /etc/sysconfig/network
Many may be provided by DHCP
GATEWAY can be overridden in ifcfg file
NETWORKING=yes
HOSTNAME=server1.example.com
GATEWAY=192.168.2.254
![Page 8: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/8.jpg)
Network Configuration FilesDNS Configuration
Domain Name Service translates hostnames to network
addresses
Server address is specified by dhcp or in /etc/resolv.conf
search example.com cracker.org
nameserver 192.168.0.254
nameserver 192.168.1.254
![Page 9: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/9.jpg)
Printing in Linux
Printers may be local or networked
Print requests are sent to queues
Queued jobs are sent to the printer on a first come first served
basis
Jobs may be canceled before or during printing
![Page 10: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/10.jpg)
Printing Commands
lpr sends a job to the queue to be printed
Accepts ASCII, PostScript, PDF, others
lpq views the contents of the queue
lprm removes a job from the queue
System V printing commands such as lp, lpstat and cancel
are also supported
![Page 11: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/11.jpg)
Printing Utilities
evince views PDF documents
lpstat -a lists configured printers
enscript and a2ps convert text to PostScript
ps2pdf converts PostScript to PDF
mpage prints multiple pages per sheet
![Page 12: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/12.jpg)
Setting the System's Date and Time
GUI: system-config-date
System->Administration->Date & Time
Can set date/time manually or use NTP
Additional NTP servers can be added
Can use local time or UTC
CLI: date [MMDDhhmm[[CC]YY][.ss]]
# date 01011330
# date 010113302007.05
![Page 13: Unit 9 basic system configuration tools](https://reader034.vdocuments.us/reader034/viewer/2022042713/54848b4f5806b5a9588b465c/html5/thumbnails/13.jpg)