CS209-01 Summer 1 2005 Homework Assignment 5 /Lab Session 6

Change Your Network Configuration With YaST

Start KDE (startx) and YaST. Click on Network Devices and Network Card. Change the already configured device in such a way that you append '3' to the hostname (ivan would change to ivan3), add 10 to the IP address (192.168.8.13 would change to 192.168.8.23), change router to 192.168.8.101 and the domain to cs2093.cs.nmsu.edu:

Close the YaST and end the current X session.

as user root run this command:

find /etc -mtime -1 -ls | grep "Jun 16 1" > /root/changed_files

Explain the command pipe above and check the changed_files. What can you learn from the file? Copy the relevant files to newly created /root/net_changes directory.

Change Your Network Configuration Manually

• Reboot your computer into single user mode (type single or - s in the grub menu)
• modify the files below in order to have
  hostname: change the '3' into '2' at the end of your hostname (ivan3 would change to ivan2)
  IP address: add 10 to the last byte of your IP address again (192.168.8.22 will become 192.168.8.32)
  netmask: 255.255.255.0
  router / gateway : 192.168.8.1
  domain: cs209.cs.nmsu.edu
• files to modify
  • /etc/sysconfig/network/ifcfg-eth-id-your:eth:er:net:add:ress
  • /etc/sysconfig/network/routes
  • /etc/hosts
  • /etc/HOSTNAME
  • /etc/resolv.conf - no need to change probably
  • /etc/nsswitch.conf - change it to use only files for hosts

Reboot and check that the network is configured correctly

Linux ivan2 2.6.11.4-20a-default #1 Tue Jun 7 18:20:46 MDT 2005 i686 i686 i386 GNU/Linux

eth0      Link encap:Ethernet  HWaddr 00:07:E9:A7:13:6F  
          inet addr:192.168.8.xy  Bcast:192.168.8.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3496 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7849 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:558363 (545.2 Kb)  TX bytes:7668994 (7.3 Mb)
          Interrupt:20 Base address:0x2000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:120 errors:0 dropped:0 overruns:0 frame:0
          TX packets:120 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:9880 (9.6 Kb)  TX bytes:9880 (9.6 Kb)

	Kernel IP routing table
	Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
	192.168.8.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
	169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth0
	127.0.0.0       0.0.0.0         255.0.0.0       U         0 0          0 lo
	0.0.0.0         192.168.8.1     0.0.0.0         UG        0 0          0 eth0
 or
	Kernel IP routing table
	Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
	link-local      *               255.255.255.0   U     0      0        0 eth0
	169.254.0.0     *               255.255.0.0     U     0      0        0 eth0
	loopback        *               255.0.0.0       U     0      0        0 lo
	default         ivan.cs209.cs.n 0.0.0.0         UG    0      0        0 eth0

Check also that you can communicate with other computers. Do ping 192.168.8.1 (Stop the ping by [CTRL] + C)
You should see output similar to

PING 192.168.8.1 (192.168.8.1): 56 octets data
64 octets from 192.168.8.1: icmp_seq=0 ttl=64 time=2.2 ms
64 octets from 192.168.8.1: icmp_seq=1 ttl=64 time=0.1 ms
64 octets from 192.168.8.1: icmp_seq=2 ttl=64 time=0.1 ms
64 octets from 192.168.8.1: icmp_seq=3 ttl=64 time=0.1 ms

--- 192.168.8.1 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 0.1/0.6/2.2 ms
	

1. your network card is recognized by a driver and module is loaded (if needed)
   Commands/files that you may need/check:
   dmesg | less - look for 'network', 'eth', '3c59x', 'eepro', ..
   lsmod
   ls -l /lib/modules/{linux_version}/kernel/drivers/net
   
2. your network interface is correctly configured / no typo in the files listed above

start KDE and add other cs209 computers into the hosts file

Add all 192.168.8.x computers below into /etc/hosts file
1 - ivan, 6 - ivantest, 26 - ivantest2,
11 - anthony , 12 - brian , 13 - carrie , 14 - carlos , 15 - andrew , 16 - ruben , 17 - donald , 18 - robert , 19 - chris ,
31 - anthony2 , 32 - brian2 , 33 - carrie2 , 34 - carlos2 , 35 - andrew2 , 36 - ruben2 , 37 - donald2 , 38 - robert2 , 39 - chris2

Start sshd

• check if   sshd   is running already - start it if necessary
• describe what you did in your report

Create 2 new users

• One user needs to be   csguest   with password cs209s1
• For the other user choose the password and the fields in the /etc/passwd   as you wish.
• With your report submit the loginname and password for the newly created user (not csguest). Make sure that this user can login into your machine form machine ivan / liberec using ssh.

Feedback

Estimate how much time did you spent on this assignment. Describe what was hard, easy, interesting, boring or confusing.

Submit PRINTED report and also send it by e-mail

attach the modified files to your report (cp them into cs domain first and attach them to your report)