OPS235 SSH
TCP/IP Network
- IP Address - IPv4: the IP address is a 32bit number
- e.g. 192.168.122.1 --> 11000000 10101000 01111010 00000001
- Newer IP address format is IPv6: the IP address is a 128 bit number
Virtual Network: 192.168.122.0/24
Host IP: 192.168.122.1
- 192.168.122.0 --> is used to identify the network
- 192.168.122.255-->is used as the broadcast address
- 192.168.122.1 --> is a so called unicast address -> go to one network device only
- multicast address --> go to a group of devices
VM1 (fedora1) IP: 192.168.122.(2-254)
VM2 (fedora2) IP: 192.168.122.(2-254)
VM3 (fedora3) IP: 192.168.122.135 (yours may be different)
VM3 <-> Host (checking connectivity using the ping command)
ping 192.168.122.1 (will keep pinging)
ping -c 2 192.168.122.1 (will send two packets to check for connectivity)
We can use the ssh utility to login to VM3 (ip:192.168.122.135)
ssh user_name@192.168.122.135
To copy a file from host to VM3
scp week4 root@192.168.122.135:
(copy the file called "week4" in the current directory of the local machine to the home directory of user "root" on 192.168.122.135)
scp root@192.168.122.135:week4-x .
(copy the file called "week4-x" from the home directory of user "root" on 192.168.122.135 to the current directory of the local machine.
copy the file called "week4-x" from the current directory of the local machine to the /tmp directory on fedora3 (192.168.122.135)
scp week4-x root@192.168.122.135:/tmp
