46 lines
1.2 KiB
Markdown
46 lines
1.2 KiB
Markdown
# Configuring SSH
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## Setting a Default Username
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If your username is different on your tilde than on your personal computer,
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you may want to specify a default username in `~/.ssh/config`.
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That can be done by adding the following entries:
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Host tilde.black
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User user
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## Using a Tilde-Specific key
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### Step 1: Generate Your Key
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[Generate a key](ed25519.md), except outputting to a Tilde-specific location.
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mkdir -p ~/.ssh/tilde.black
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ssh-keygen -a100 -ted25519 -f ~/.ssh/tilde.black/id_ed25519 -C ''
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### Step 2: Authorize Your Key
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If you have yet to [sign up](sign-up.md) to your desired Tilde,
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send the *public* key (`~/.ssh/tilde.black/id_ed25519.pub`) to the admin.
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If you already have an account, you can authorize your new key by adding it to,
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or replacing your old key in, `~/.ssh/authorized_keys`.
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$ scp ~/.ssh/tilde.black/id_ed25519.pub user@tilde.black:key.pub
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$ ssh user@tilde.black
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tilde$ cat key.pub >> .ssh/authorized_keys
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tilde$ rm key.pub
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### Step 3: Configure SSH
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To make `ssh(1)` *only* use that key for that tilde, you can add the following
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lines to `~/.ssh/config`:
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Host tilde.black
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IdentitiesOnly yes
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IdentityFile ~/.ssh/tilde.black/id_ed25519
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## See Also
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[SSH over Tor](ssh-over-tor.md)
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