October 2015
Intermediate to advanced
458 pages
10h 49m
English
Content preview from Red Hat Enterprise Linux Troubleshooting GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Identifying the issue
From the alert, we can see that our monitoring system was unable to perform ICMP pings to our company blog server. The first thing we should do is determine whether or not we can ping the server:
$ ping blog.example.com PING blog.example.com (192.168.33.11): 56 data bytes 64 bytes from 192.168.33.11: icmp_seq=0 ttl=64 time=0.832 ms 64 bytes from 192.168.33.11: icmp_seq=1 ttl=64 time=0.382 ms 64 bytes from 192.168.33.11: icmp_seq=2 ttl=64 time=0.240 ms 64 bytes from 192.168.33.11: icmp_seq=3 ttl=64 time=0.234 ms ^C --- blog.example.com ping statistics --- 4 packets transmitted, 4 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 0.234/0.422/0.832/0.244 ms
It seems that we are able to ping the server in question, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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