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Cheatsheet: Difference between revisions

Line 748:
* This means "try files (/etc/hosts); and if it fails, try DNS."
* i.e. If the host name is not found there, then consult the remote DNS name servers identified by the /etc/resolv.conf file.
* But thatThis order could be changed or expanded.
 
* As a single file, it doesn't scale well: the size of the file becomes too big very soon.
Line 770:
Override addresses that your DNS server provides
Control access to network traffic
 
* IP-to-hostname conversion usually display only the first name found:
 
192.168.10.12 server.example.com myftp.example.com myhost myftp
 
$ ping myftp
PING myhost.example.com (192.168.10.12) 56(84) bytes of data.
64 bytes from myhost.example.com (192.168.10.12): icmp_seq=1 ttl=64 time=0.023 ms
64 bytes from myhost.example.com (192.168.10.12): icmp_seq=2 ttl=64 time=0.028 ms
 
Note that we pinged myftp but results come from host myhost. This is a reliable hint that you are addressing an alias, not the actual host.
 
== Check CPU, Memory and HDD ==
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