ssh接続を簡単にする

ssh鍵認証

準備

まだmacに.ssh/id_rsa.pubの鍵がない場合はmacで下記のコマンドを実行し生成します

mac:~ $ ssh-keygen -t rsa -b 4096

鍵認証で入れるようにmac側の公開鍵をラズパイに設定します。

mac:~ $ ssh-copy-id -i .ssh/id_rsa.pub [e-mail]
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: ".ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
[e-mail]'s password: 

Number of key(s) added:        1

Now try logging into the machine, with:   "ssh '[e-mail]'"
and check to make sure that only the key(s) you wanted were added.

確認

mac:~ $ ssh [e-mail]
Linux raspberrypi 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr  3 17:24:16 BST 2023 aarch64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Mon Jul 17 16:02:31 2023 from 240b:11:bc00:7d00:3c19:1e17:4098:36d5
pi@raspberrypi:~ $ 

パスワードを入力することなく、入れるようになった。

ニックネームでログインできるようにする

設定ファイルの作成

macの~/.ssh/configに下記の内容で設定する。追記またはファイルを新規作成する。

Host raspi 
HostName raspberrypi.local 
port 22
User pi 
IdentityFile ~/.ssh/id_rsa

ニックネームでログイン

mac:~ $ ssh raspi
Linux raspberrypi 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr  3 17:24:16 BST 2023 aarch64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Mon Jul 17 16:09:13 2023 from 240b:11:bc00:7d00:3c19:1e17:4098:36d5
pi@raspberrypi:~ $