diff --git a/src/screens/SshKeyPrompt.jsx b/src/screens/SshKeyPrompt.jsx
index 6109a78..0ae401e 100644
--- a/src/screens/SshKeyPrompt.jsx
+++ b/src/screens/SshKeyPrompt.jsx
@@ -23,6 +23,17 @@ export default function SshKeyPrompt({ nav }) {
     <Box flexDirection="column">
       <Text>Paste the contents of your <Text bold>.pub</Text> file (single line):</Text>
       <Text dimColor>It will be appended to ~/.ssh/authorized_keys (dedup'd).</Text>
+      <Box flexDirection="column" marginTop={1} borderStyle="single" borderColor="gray" paddingX={1}>
+        <Text bold>How to get the .pub file from another machine</Text>
+        <Text dimColor>1. If you don't have one yet, generate it on that machine:</Text>
+        <Text>     <Text color="cyan">ssh-keygen -t ed25519 -C "your_email@example.com"</Text></Text>
+        <Text dimColor>   (press Enter at every prompt to accept defaults)</Text>
+        <Text dimColor>2. Print and copy the public key:</Text>
+        <Text>   Linux/macOS: <Text color="cyan">cat ~/.ssh/id_ed25519.pub</Text></Text>
+        <Text>   Windows (PowerShell): <Text color="cyan">type $env:USERPROFILE\.ssh\id_ed25519.pub</Text></Text>
+        <Text dimColor>   (fall back to id_rsa.pub if you used RSA)</Text>
+        <Text dimColor>3. Copy the whole single line (starts with <Text color="cyan">ssh-ed25519</Text> / <Text color="cyan">ssh-rsa</Text>) and paste below.</Text>
+      </Box>
       <Box marginTop={1}>
         <Text>key › </Text>
         <TextInput value={key} onChange={(v) => { setKey(v); if (error) setError(null); }} />