Use consistent documentation file names

docs/command-bash.md

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+# Use bash script to start server
+
+You may use a `bash` script to start your server rather than invoking `java`
+directly. This requires some changes though to ensure your server properly shuts
+down.
+
+When lazymc stops your server it sends a [`SIGTERM`][sigterm] signal to the
+invoked server process to gracefully shut it down. `bash` ignores this signal by
+default and keeps the Minecraft server running.
+
+You must configure `bash` to [forward][forward-signal] the signal to properly
+shutdown the Minecraft server as well.
+
+[sigterm]: https://en.wikipedia.org/wiki/Signal_(IPC)#SIGTERM
+[forward-signal]: https://unix.stackexchange.com/a/434269/61092
+
+## Example
+
+Here's a minimal example, trapping the signal and forwarding it to the server.
+Be sure to set the correct server JAR file and appropriate memory limits.
+
+[`start-server`](../res/start-server):
+
+```bash
+#!/bin/bash
+
+# Server JAR file, set this to your own
+FILE=server.jar
+
+# Trap SIGTERM, forward it to server process ID
+trap 'kill -TERM $PID' TERM INT
+
+# Start server
+java -Xms1G -Xmx1G -jar $FILE --nogui &
+
+# Remember server process ID, wait for it to quit, then reset the trap
+PID=$!
+wait $PID
+trap - TERM INT
+wait $PID
+```