Docs should suggests using `apt` and `dnf` for package install

[xlionjuan]

Most of times, user should install packages with the frontend(In here means apt and dnf) to install packages, because it has the ability to query the repo data if additional deps are needed.

ntpd-rs/docs/guide/installation.md

Lines 12 to 20 in 520fd16

	```console
	$ sudo dpkg -i /path/to/deb/file.deb
	```
	On a red hat based linux, the `.rpm` package can be installed with
	```console
	$ sudo rpm -ivh /path/to/rpm/file.rpm
	$ sudo systemctl start ntpd-rs
	```

[davidv1992]

We explicitly don't want to have the user install the version from their distributions repository in those guides, as those can be significantly out of date. I never got installation through the frontend to work properly for a custom (non-repository) package (except through debians GUI, but writing a guide for that is a bit akward). If you a working suggestion on how to do that for either debian or the RPM based distros, we are open to a pull request.

[xlionjuan]

I mean use apt and dnf to install "file".

[davidv1992]

I understand, however last time I tried that I failed to figure out the proper command line invocation for those to install the file. If you have suggestions how that can be done please share.

[xlionjuan]

Oh the only dep for ntpd-rs is only libc6, and it is impossible to have a system that don't come with that.

For the syntax of the install package from files, only apt is a little different, it needs ./ in front of the file name.

APT

apt install ./ntpd-rs_1.7.2-1_amd64.deb

DNF

dnf install ntpd-rs-1.7.2-1.x86_64.rpm

Zypper

zypper in ntpd-rs-1.7.2-1.x86_64.rpm

I'll close this issue, you decide to edit it or not since it is just a little changes.

[davidv1992]

For internal tracking I want to keep this open a bit longer.

[xlionjuan]

You want to open it right?

[davidv1992]

Yes, thanks for noticing, we did something stupid during our internal work planning.