Icinga 2 Configuration Vim Syntax Highlighting
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$ PREFIX=~/.vim
$ mkdir -p $PREFIX/{syntax,ftdetect}
$ cp syntax/icinga2.vim $PREFIX/syntax/
$ cp ftdetect/icinga2.vim $PREFIX/ftdetect/
Modify 'ftdetect/icinga2.vim' if your configuration isn't located in
'/etc/icinga2'.
Now test it :-)
$ vim /etc/icinga2/conf.d/templates.conf