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host: Use ArgsParser to parse arguments, and add man page (#1252)

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Fixes #1246.
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howar6hill 2020-02-20 22:12:55 +08:00 • committed by GitHub
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Base/usr/share/man/man1/host.md Normal file
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## Name
host - DNS lookup utility
## Synopsis
```**sh
$ host <name>
```
## Description
`host` is a simple utility for performing DNS lookups. It is used to
convert names to IP addresses and vice versa.
`name` is the domain name that is to be looked up. It can also be a
dotted-decimal IPv4 address, in which case `host` will perform a reverse
lookup for that address.
## Examples
```sh
$ host github.com
$ host 8.8.8.8
```