I am on my debian7.8 ,change my hostname from test into testtest according to https://github.com/DigitalOcean-User-Projects/Articles-and-Tutorials/blob/master/set_hostname_fqdn_on_ubuntu_centos.md#setting-the-fully-qualified-domain-name-fqdn
root@test:/home/demo# service hostname restart hostname: unrecognized service
how can i do now ?
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