Dependencies check

src/install.md

@@ -59,6 +59,42 @@ Synit builds upon many existing technologies, but primarily relies on the follow
    reason. See [here](./emulator.md) for [instructions on running Synit on a emulated
    device](./emulator.md).
 
+Here's a small shell snippet to quickly check for the dependencies you will need:[^contact-if-missing]
+
+```shell
+(
+    rustc +nightly --version
+    cross +nightly --version
+    docker --version
+    python --version
+    git --version
+    ssh -V
+    rsync --version | head -1
+    make --version | head -1
+    cc --version | head -1
+    preserves-tool --version
+    qemu-system-aarch64 --version | head -1
+    ls -la /proc/sys/fs/binfmt_misc/qemu-aarch64
+) 2>/dev/null
+```
+
+On my machine, it outputs:
+
+```
+rustc 1.73.0-nightly (6ef7d16be 2023-08-19)
+cross 0.2.5
+cargo 1.73.0-nightly (80eca0e58 2023-08-19)
+Docker version 20.10.25+dfsg1, build b82b9f3
+Python 3.11.4
+git version 2.40.1
+rsync  version 3.2.7  protocol version 31
+GNU Make 4.3
+cc (Debian 13.2.0-2) 13.2.0
+preserves-tools 3.0.2
+QEMU emulator version 8.0.4 (Debian 1:8.0.4+dfsg-1)
+-rw-r--r-- 1 root root 0 Aug 19 12:47 /proc/sys/fs/binfmt_misc/qemu-aarch64
+```
+
 ## Get the code
 
 The Synit codebase itself is contained in the [`synit` git
@@ -152,3 +188,7 @@ following the information in [the following chapter](./operation/index.md).
     one](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1014177)) which makes Docker-based
     cross builds hang. *Downgrading* `qemu-user-static` to version `1:5.2+dfsg-11+deb11u2`
     worked for me, as did *upgrading* (as of October 2022) to version `1:7.1+dfsg-2`.
+
+[^contact-if-missing]: Please [contact me at
+    `tonyg@leastfixedpoint.com`](mailto:tonyg@leastfixedpoint.com) if a dependency needs to be
+    added to the list.