Add avm docs (#4)

src/SUMMARY.md

@@ -17,9 +17,10 @@
   - [Intermediate]()
 - [Anchor Periphery](./chapter_4/anchor_periphery.md)
   - [CLI](./chapter_4/cli.md)
+  - [AVM](./chapter_4/avm.md)
   - [IDL]()
 - [Anchor BTS]()
 
 ---
 
-- [Reference Links](./reference_links.md)
+- [Reference Links](./reference_links.md)

src/chapter_2/installation.md

@@ -1,4 +1,5 @@
 # Installation
+
 ## Rust
 
 Go [here](https://www.rust-lang.org/tools/install) to install Rust.
@@ -35,4 +36,26 @@ Now verify the CLI is installed properly.
 
 ```
 anchor --version
-```
+```
+
+### Installing using Anchor version manager (avm)
+
+Anchor version manager is a tool for using multiple versions of the anchor-cli. It will require the same dependencies as building from source. It is recommended you uninstall the NPM package if you have it installed.
+
+Install `avm` using Cargo. Note this will replace your `anchor` binary if you had one installed.
+
+```
+cargo install --git https://github.com/project-serum/anchor avm --locked --force
+```
+
+Install the latest version of the CLI using `avm`. You can also use the command to upgrade to the latest release in the future.
+
+```
+avm use latest
+```
+
+Verify the installation.
+
+```
+anchor --version
+```

src/chapter_4/avm.md

@@ -0,0 +1,84 @@
+# Anchor Version Manager
+
+Anchor Version Manager (avm) is provided to manage multiple installations of the anchor-cli binary. This may be required to produce verifiable builds, or if you'd prefer to work with an alternate version.
+
+```
+Anchor version manager
+
+USAGE:
+    avm <SUBCOMMAND>
+
+OPTIONS:
+    -h, --help       Print help information
+    -V, --version    Print version information
+
+SUBCOMMANDS:
+    help         Print this message or the help of the given subcommand(s)
+    install      Install a version of Anchor
+    list         List available versions of Anchor
+    uninstall    Uninstall a version of Anchor
+    use          Use a specific version of Anchor
+```
+
+## Install
+
+```
+avm install <version>
+```
+
+Install the specified version of anchor-cli. The version argument should follow semver versioning. It is also possible to use `latest` as the version argument to install the latest version.
+
+## List
+
+```
+avm list
+```
+
+Lists available versions of anchor-cli.
+
+```
+0.3.0
+0.4.0
+0.4.1
+0.4.2
+0.4.3
+0.4.4
+0.4.5
+0.5.0
+0.6.0
+0.7.0
+0.8.0
+0.9.0
+0.10.0
+0.11.0
+0.11.1
+0.12.0
+0.13.0
+0.13.1
+0.13.2
+0.14.0
+0.15.0
+0.16.0
+0.16.1
+0.16.2
+0.17.0
+0.18.0
+0.18.2
+0.19.0
+0.20.0  (installed)
+0.20.1  (latest, installed, current)
+```
+
+## Uninstall
+
+```
+avm uninstall <version>
+```
+
+## Use
+
+```
+avm use <version>
+```
+
+Use a specific version. This version will remain in use until you change it by calling the same command again. Similarly to `avm install`, you can also use `latest` for the version.