/usr/share/vim/vim80/syntax/hostsaccess.vim is in vim-runtime 2:8.0.1453-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | " Vim syntax file
" Language: hosts.deny, hosts.allow configuration files
" Maintainer: Thilo Six <T.Six@gmx.de>
" Last Change: 2011 May 01
" Derived From: conf.vim
" Credits: Bram Moolenaar
"
" This file is there to get at least a minimal highlighting.
" A later version may be improved.
" Quit when a (custom) syntax file was already loaded
if exists("b:current_syntax")
finish
endif
" For a starter we just use conf.vim for highlighting
runtime! syntax/conf.vim
unlet b:current_syntax
let b:current_syntax = "hostsaccess"
" vim: ts=8 sw=2
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