update links in install page

Most of them were OK, but they're easier to update when they're
all defined at the bottom of the file

docs/_install-and-build/Installing-Geth.md

@@ -3,7 +3,11 @@ title: Installing Geth
 sort_key: A
 ---
 
-You can install the Go implementation of Ethereum using a variety of ways. These include installing it via your favorite package manager; downloading a standalone pre-built bundle; running as a docker container; or building it yourself. This document details all of the possibilities to get you joining the Ethereum network using whatever means you prefer. A list of stable releases can be found [here](https://github.com/ethereum/go-ethereum/releases).
+You can install the Go implementation of Ethereum using a variety of ways. These include
+installing it via your favorite package manager; downloading a standalone pre-built
+bundle; running as a docker container; or building it yourself. This document details all
+of the possibilities to get you joining the Ethereum network using whatever means you
+prefer. A list of stable releases can be found [here][geth-releases].
 
 {:toc}
 
@@ -11,15 +15,17 @@ You can install the Go implementation of Ethereum using a variety of ways. These
 
 ## Updating Geth
 
-Updating go-ethereum is as easy as it gets. You just need to download and install the newer version of geth, shutdown your node and restart with the new software. 
+Updating go-ethereum is as easy as it gets. You just need to download and install the
-Geth will automatically use the data of your old node and sync the latest blocks that were mined since you shutdown the old software.
+newer version of geth, shutdown your node and restart with the new software. Geth will
+automatically use the data of your old node and sync the latest blocks that were mined
+since you shutdown the old software.
 
 ## Install from a package manager
 
 ### Install on macOS via Homebrew
 
-The easiest way to install go-ethereum is to use our
+The easiest way to install go-ethereum is to use our Homebrew tap. If you don't have
-Homebrew tap. If you don't have Homebrew, [install it first](https://brew.sh).
+Homebrew, [install it first][brew].
 
 Run the following commands to add the tap and install `geth`:
 
@@ -40,7 +46,10 @@ Find the different options and commands available with `geth --help`.
 
 ### Install on Ubuntu via PPAs
 
-The easiest way to install go-ethereum on Ubuntu-based distributions is with the built-in launchpad PPAs (Personal Package Archives). We provide a single PPA repository that contains both our stable and development releases for Ubuntu versions `trusty`, `xenial`, `zesty` and `artful`.
+The easiest way to install go-ethereum on Ubuntu-based distributions is with the built-in
+launchpad PPAs (Personal Package Archives). We provide a single PPA repository that
+contains both our stable and development releases for Ubuntu versions `trusty`, `xenial`,
+`zesty` and `artful`.
 
 To enable our launchpad repository run:
 
@@ -68,7 +77,10 @@ Find the different options and commands available with `geth --help`.
 
 ### Install on Windows
 
-The easiest way to install go-ethereum is to download a pre-compiled binary from the [downloads](https://geth.ethereum.org/downloads/) page. The  page provides an installer as well as a zip file. The installer puts `geth` into your `PATH` automatically. The zip file contains the command `.exe` files that you can use without installing by runnning it from the command prompt.
+The easiest way to install go-ethereum is to download a pre-compiled binary from the
+[downloads][geth-dl] page. The page provides an installer as well as a zip file. The
+installer puts `geth` into your `PATH` automatically. The zip file contains the command
+`.exe` files that you can use without installing by runnning it from the command prompt.
 
 ### Install on FreeBSD via pkg
 
@@ -104,7 +116,7 @@ Find the different options and commands available with `geth --help`.
 
 ### Install on Arch Linux via `pacman`
 
-The `geth` package is available from the [community repo](https://www.archlinux.org/packages/community/x86_64/geth/).
+The `geth` package is available from the [community repo][geth-archlinux].
 
 You can install it using:
 
@@ -118,7 +130,11 @@ Find the different options and commands available with `geth --help`.
 
 ## Download standalone bundle
 
-We distribute our stable releases and development builds as standalone bundles. These are useful when you'd like to: a) install a specific version of our code (e.g., for reproducible environments); b) install on machines without internet access (e.g., air-gapped computers); or c) do not like automatic updates and would rather manually install software.
+We distribute our stable releases and development builds as standalone bundles. These are
+useful when you'd like to: a) install a specific version of our code (e.g., for
+reproducible environments); b) install on machines without internet access (e.g.,
+air-gapped computers); or c) do not like automatic updates and would rather manually
+install software.
 
 We create the following standalone bundles:
 
@@ -126,13 +142,17 @@ We create the following standalone bundles:
 -   64bit archives (`.tar.gz`) on macOS
 -   32bit and 64bit archives (`.zip`) and installers (`.exe`) on Windows
 
-We provide archives containing only Geth, and archives containing Geth along with the developer tools from our repository (`abigen`, `bootnode`, `disasm`, `evm`, `rlpdump`). Read our [`README`](https://github.com/ethereum/go-ethereum#executables) for more information about these executables.
+We provide archives containing only Geth, and archives containing Geth along with the
+developer tools from our repository (`abigen`, `bootnode`, `disasm`, `evm`, `rlpdump`).
+Read our [`README`][geth-readme-exe] for more information about these executables.
 
-Download these bundles from the [Go Ethereum Downloads](https://geth.ethereum.org/downloads) page.
+Download these bundles from the [Go Ethereum Downloads][geth-dl] page.
 
 ## Run inside Docker container
 
-If you prefer containerized processes, we maintain a Docker image with recent snapshot builds from our `develop` branch on DockerHub. We maintain four different Docker images for running the latest stable or development versions of Geth.
+If you prefer containerized processes, we maintain a Docker image with recent snapshot
+builds from our `develop` branch on DockerHub. We maintain four different Docker images
+for running the latest stable or development versions of Geth.
 
 -   `ethereum/client-go:latest` is the latest development version of Geth (default)
 -   `ethereum/client-go:stable` is the latest stable version of Geth
@@ -146,7 +166,8 @@ docker pull ethereum/client-go
 docker run -it -p 30303:30303 ethereum/client-go
 ```
 
-We also maintain four different Docker images for running the latest stable or development versions of miscellaneous Ethereum tools.
+We also maintain four different Docker images for running the latest stable or development
+versions of miscellaneous Ethereum tools.
 
 -   `ethereum/client-go:alltools-latest` is the latest development version of the Ethereum tools
 -   `ethereum/client-go:alltools-stable` is the latest stable version of the Ethereum tools
@@ -160,19 +181,26 @@ The image has the following ports automatically exposed:
 -   `8547` TCP, used by the GraphQL API
 -   `30303` TCP and UDP, used by the P2P protocol running the network
 
-_Note, if you are running an Ethereum client inside a Docker container, you should mount a data volume as the client's data directory (located at `/root/.ethereum` inside the container) to ensure that downloaded data is preserved between restarts and/or container life-cycles._
+_Note, if you are running an Ethereum client inside a Docker container, you should mount a
+data volume as the client's data directory (located at `/root/.ethereum` inside the
+container) to ensure that downloaded data is preserved between restarts and/or container
+life-cycles._
 
 ## Build go-ethereum from source code
 
 ### Most Linux systems and macOS
 
-Go Ethereum is written in [Go](https://golang.org), so to build from source code you need the most recent version of Go. This guide doesn't cover how to install Go itself, for details read the [Go installation instructions](https://golang.org/doc/install) and grab any needed bundles from the [Go download page](https://golang.org/dl/).
+Go Ethereum is written in [Go][go], so to build from source code you need the most recent
+version of Go. This guide doesn't cover how to install Go itself, for details read the [Go
+installation instructions][go-install] and grab any needed bundles from the [Go download
+page][go-dl].
 
 With Go installed, you can download the project into you `GOPATH` workspace via:
 
 ```shell
 go get -d github.com/ethereum/go-ethereum
 ```
+
 You can also install specific versions via:
 
 ```shell
@@ -185,15 +213,21 @@ The above commands do not build any executables. To do that you can either build
 go install github.com/ethereum/go-ethereum/cmd/geth
 ```
 
-Or you can build the entire project and install `geth` along with all developer tools by running `go install ./...` in the `ethereum/go-ethereum` repository root inside your `GOPATH` workspace.
+Or you can build the entire project and install `geth` along with all developer tools by
+running `go install ./...` in the `ethereum/go-ethereum` repository root inside your
+`GOPATH` workspace.
 
-If you are using macOS and see errors related to macOS header files, install XCode Command Line Tools with `xcode-select --install`, and try again.
+If you are using macOS and see errors related to macOS header files, install XCode Command
+Line Tools with `xcode-select --install`, and try again.
 
-If you encounter `go: cannot use path@version syntax in GOPATH mode` or similar errors, enable gomodules using `export GO111MODULE=on`.
+If you encounter `go: cannot use path@version syntax in GOPATH mode` or similar errors,
+enable gomodules using `export GO111MODULE=on`.
 
 ### Windows
 
-The Chocolatey package manager provides an easy way to get the required build tools installed. If you don't have chocolatey, [follow the instructions](https://chocolatey.org) to install it first.
+The Chocolatey package manager provides an easy way to get the required build tools
+installed. If you don't have chocolatey, [follow the instructions][chocolatey] to install
+it first.
 
 Then open an Administrator command prompt and install the build tools you need:
 
@@ -203,9 +237,11 @@ C:\Windows\system32> choco install golang
 C:\Windows\system32> choco install mingw
 ```
 
-Installing these packages sets up the path environment variables, you need to open a new command prompt to get the new path.
+Installing these packages sets up the path environment variables, you need to open a new
+command prompt to get the new path.
 
-The following steps don't need Administrator privileges. First create and set up a Go workspace directory layout, then clone the source and build it.
+The following steps don't need Administrator privileges. First create and set up a Go
+workspace directory layout, then clone the source and build it.
 
 ```
 C:\Users\xxx> mkdir src\github.com\ethereum
@@ -249,7 +285,10 @@ You can now run `build/bin/geth` to start your node.
 
 ### Building without a Go workflow
 
-If you do not want to set up Go workspaces on your machine, but only build `geth` and forget about the build process, you can clone our repository and use the `make` command, which configures everything for a temporary build and cleans up afterwards. This method of building only works on UNIX-like operating systems, and you still need Go installed.
+If you do not want to set up Go workspaces on your machine, but only build `geth` and
+forget about the build process, you can clone our repository and use the `make` command,
+which configures everything for a temporary build and cleans up afterwards. This method of
+building only works on UNIX-like operating systems, and you still need Go installed.
 
 ```shell
 git clone https://github.com/ethereum/go-ethereum.git
@@ -257,10 +296,24 @@ cd go-ethereum
 make geth
 ```
 
-These commands create a `geth` executable file in the `go-ethereum/build/bin` folder that you can move wherever you want to run from. The binary is standalone and doesn't require any additional files.
+These commands create a `geth` executable file in the `go-ethereum/build/bin` folder that
+you can move wherever you want to run from. The binary is standalone and doesn't require
+any additional files.
 
-Additionally you can compile all additional tools go-ethereum comes with by running `make all`. A list of all tools can be found [here](https://github.com/ethereum/go-ethereum/tree/master/cmd).
+Additionally you can compile all additional tools go-ethereum comes with by running `make
+all`. A list of all tools can be found [here][geth-readme-exe].
 
 If you want to cross-compile to another architecture check out the [cross-compilation guide](./cross-compile).
 
-If you want to build a stable release, the v1.9.21 release for example, you can use `git checkout v1.9.21` before running `make geth` to switch to a stable branch.
+If you want to build a stable release, the v1.9.21 release for example, you can use `git
+checkout v1.9.21` before running `make geth` to switch to a stable branch.
+
+[brew]: https://brew.sh/
+[go]: https://golang.org/
+[go-dl]: https://golang.org/dl/
+[go-install]: https://golang.org/doc/install
+[chocolatey]: https://chocolatey.org
+[geth-releases]: https://github.com/ethereum/go-ethereum/releases
+[geth-readme-exe]: https://github.com/ethereum/go-ethereum#executables
+[geth-archlinux]: https://www.archlinux.org/packages/community/x86_64/geth/
+[geth-dl]: ../../downloads/