66 lines
1.8 KiB
Bash
66 lines
1.8 KiB
Bash
#!/bin/bash
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echo "== Flexible User Creation Script =="
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echo
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# Prompt for username
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read -p "Username to create (required): " USERNAME
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if [[ -z "$USERNAME" ]]; then
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echo "Error: Username is required."
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exit 1
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fi
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# Prompt for public key
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read -p "Paste the SSH public key: " PUBKEY
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if [[ -z "$PUBKEY" ]]; then
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echo "Error: Public key is required."
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exit 1
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fi
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# Prompt for optional groups
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read -p "Comma-separated groups to add (e.g. sudo,docker): " GROUPS
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GROUPS=$(echo "$GROUPS" | tr -d '[:space:]') # remove all whitespace
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IFS=',' read -ra GROUP_ARRAY <<< "$GROUPS"
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# Check if user exists
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if id "$USERNAME" &>/dev/null; then
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echo "[*] User '$USERNAME' already exists. Skipping creation."
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else
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echo "[+] Creating user: $USERNAME"
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useradd -m -s /bin/bash "$USERNAME"
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fi
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# Add user to groups
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for group in "${GROUP_ARRAY[@]}"; do
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if [[ -n "$group" ]]; then
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if getent group "$group" > /dev/null; then
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echo "[+] Adding $USERNAME to group: $group"
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usermod -aG "$group" "$USERNAME"
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else
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echo "[!] Warning: Group '$group' does not exist. Skipping."
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fi
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fi
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done
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# Setup SSH access
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AUTHORIZED_KEYS="/home/$USERNAME/.ssh/authorized_keys"
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mkdir -p "$(dirname "$AUTHORIZED_KEYS")"
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touch "$AUTHORIZED_KEYS"
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chmod 700 "$(dirname "$AUTHORIZED_KEYS")"
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chmod 600 "$AUTHORIZED_KEYS"
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chown -R "$USERNAME:$USERNAME" "/home/$USERNAME/.ssh"
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# Add key if not already present
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if grep -Fxq "$PUBKEY" "$AUTHORIZED_KEYS"; then
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echo "[*] Public key already present. Skipping."
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else
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echo "$PUBKEY" >> "$AUTHORIZED_KEYS"
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echo "[+] Public key added."
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fi
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# Done
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echo
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echo "[✓] User '$USERNAME' setup complete."
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[[ ${#GROUP_ARRAY[@]} -gt 0 ]] && echo "[✓] Groups added: ${GROUP_ARRAY[*]}"
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echo "[✓] SSH access configured."
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