I am wondering how can I get the hostname (fully qualified domain name) of the machine I am working on?

Here is my script:

 #! /bin/sh hostname=$(host $ipaddr | awk '{print substr($NF,1,length($NF)-1)}') echo $hostname $h= get the current hostname if [ $hostname -ne $h ] then
//instructions fi

6

2 Answers

Use hostname or uname -n to get the kernel hostname (nodename).

hostname -s will give just the first component of the same.

Use hostname -f to get the FQDN – it additionally tries to translate the hostname to an IP address, then back to a domain name.

4

Using an environment variable may be tricky.It might be a matter of the shell you're using: some shells use $HOST, others use $HOSTNAME. I would go with the uname -n option that @grawity mentioned.

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