Michael Chus
2d424c63cb
User sees a numbered list but could only type the name. Now numeric input is resolved to the interface name via awk NR==N. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
62 lines
1.4 KiB
Bash
Executable File
62 lines
1.4 KiB
Bash
Executable File
#!/bin/sh
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# Quick network configurator for the local console.
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set -e
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# List interfaces (exclude lo)
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IFACES=$(ip -o link show | awk -F': ' '$2 != "lo" {print $2}' | cut -d@ -f1)
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echo "Interfaces:"
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i=1
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for iface in $IFACES; do
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ip=$(ip -4 addr show "$iface" 2>/dev/null | awk '/inet /{print $2}' | head -1)
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echo " $i) $iface ${ip:-no IP}"
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i=$((i+1))
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done
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echo ""
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printf "Interface number or name [Enter = first]: "
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read INPUT
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if [ -z "$INPUT" ]; then
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IFACE=$(echo "$IFACES" | head -1)
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elif echo "$INPUT" | grep -qE '^[0-9]+$'; then
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# Numeric input — resolve to name
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IFACE=$(echo "$IFACES" | awk "NR==$INPUT")
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if [ -z "$IFACE" ]; then
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echo "Error: no interface with number $INPUT"
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exit 1
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fi
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else
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IFACE="$INPUT"
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fi
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echo "Selected: $IFACE"
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echo ""
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echo " 1) DHCP"
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echo " 2) Static"
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printf "Mode [1]: "
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read MODE
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MODE=${MODE:-1}
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if [ "$MODE" = "1" ]; then
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echo "Running DHCP on $IFACE..."
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dhclient -v "$IFACE"
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else
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printf "IP address (e.g. 192.168.1.100/24): "
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read ADDR
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printf "Gateway (e.g. 192.168.1.1): "
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read GW
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printf "DNS [8.8.8.8]: "
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read DNS
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DNS=${DNS:-8.8.8.8}
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ip addr flush dev "$IFACE"
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ip addr add "$ADDR" dev "$IFACE"
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ip link set "$IFACE" up
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ip route add default via "$GW"
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echo "nameserver $DNS" > /etc/resolv.conf
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echo "Done."
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fi
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echo ""
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ip -4 addr show "$IFACE"
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