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This was actually quite an easy one. Wish I could have started this earlier.

I was a bit disoriented or I guess distracted the whole day that I only started working on this lab

8 hours after it was assigned to me, adnd I only worked on this lab for 15 mins or less!

Anyway, this lab just requires to add a DNS name server to the App server.

1. Connect via SSH to the correct app server

thor@jump_host /$ sshpass -p '******' ssh -o StrictHostKeyChecking=no tony@172.16.238.10 Warning: Permanently added '172.16.238.10' (ECDSA) to the list of known hosts. [tony@stapp01 ~]$

2. Verify if DNS is really not working by doing a ping test.

[tony@stapp01 ~]$ ping www.google.com PING www.google.com (216.58.206.4) 56(84) bytes of data. # Well this seems to 64 bytes from fra16s20-in-f4.1e100.net (216.58.206.4): icmp_seq=1 ttl=118 time=5.08 ms # be working... 64 bytes from fra16s20-in-f4.1e100.net (216.58.206.4): icmp_seq=2 ttl=118 time=5.42 ms 64 bytes from fra16s20-in-f4.1e100.net (216.58.206.4): icmp_seq=3 ttl=118 time=5.17 ms 64 bytes from fra16s20-in-f4.1e100.net (216.58.206.4): icmp_seq=4 ttl=118 time=5.12 ms 64 bytes from fra16s20-in-f4.1e100.net (216.58.206.4): icmp_seq=5 ttl=118 time=5.11 ms 64 bytes from fra16s20-in-f4.1e100.net (216.58.206.4): icmp_seq=6 ttl=118 time=5.16 ms ^C --- www.google.com ping statistics --- 6 packets transmitted, 6 received, 0% packet loss, time 5008msrtt min/avg/max/mdev = 5.087/5.180/5.421/0.145 ms [tony@stapp01 ~]$ [tony@stapp01 ~]$

3. Edit /etc/resolv.conf and add nameserver for Google

[tony@stapp01 ~]$ sudo ls -l /etc/resolv.conf

We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things:

#1) Respect the privacy of others. #2) Think before you type. #3) With great power comes great responsibility.

[sudo] password for tony: -rw-r--r-- 1 root root 69 Jul 6 19:00 /etc/resolv.conf [tony@stapp01 ~]$ # So apparently 'nano' [tony@stapp01 ~]$ sudo nano /etc/resolv.conf # isn't really supported sudo: nano: command not found # in KodeKloud labs. [tony@stapp01 ~]$ [tony@stapp01 ~]$ sudo vi /etc/resolv.conf # Add nameserver [tony@stapp01 ~]$ [tony@stapp01 ~]$ sudo cat /etc/resolv.conf search stratos.xfusioncorp.com nameserver 127.0.0.11 nameserver 8.8.8.8 # added nameserver 8.8.8.8 nameserver 8.8.4.4 # added nameserver 8.8.4.4 options ndots:0 [tony@stapp01 ~]$

4. Test connectivity

[tony@stapp01 ~]$ ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_seq=1 ttl=118 time=5.75 ms 64 bytes from 8.8.8.8: icmp_seq=2 ttl=118 time=5.08 ms 64 bytes from 8.8.8.8: icmp_seq=3 ttl=118 time=5.10 ms ^C --- 8.8.8.8 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2002ms rtt min/avg/max/mdev = 5.080/5.311/5.754/0.318 ms [tony@stapp01 ~]$ [tony@stapp01 ~]$ ping 8.8.4.4 PING 8.8.4.4 (8.8.4.4) 56(84) bytes of data. 64 bytes from 8.8.4.4: icmp_seq=1 ttl=118 time=5.30 ms 64 bytes from 8.8.4.4: icmp_seq=2 ttl=118 time=5.64 ms 64 bytes from 8.8.4.4: icmp_seq=3 ttl=118 time=5.71 ms 64 bytes from 8.8.4.4: icmp_seq=4 ttl=118 time=5.36 ms ^C --- 8.8.4.4 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3004ms rtt min/avg/max/mdev = 5.302/5.507/5.715/0.175 ms [tony@stapp01 ~]$

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