NetworkManager配置IP和HostName

设置IP与Hostname

#!/bin/bash
# set-net.sh - Modify network settings partially using NetworkManager
# Example:
# set-net.sh -i eth0 --ip 192.168.1.10/24
# set-net.sh -i eth0 --gw 192.168.1.1
# set-net.sh -i eth0 --dns 8.8.8.8
# set-net.sh --hostname server01set -eusage() {
echo "Usage:"
echo "  $0 -i <iface> [--ip IP/PREFIX] [--gw GATEWAY] [--dns DNS]"
echo "  $0 --hostname HOSTNAME"
exit 1
}IFACE=""
IPADDR=""
GATEWAY=""
DNS=""
NEW_HOSTNAME=""while [[ $# -gt 0 ]]; docase "$1" in-i|--iface)IFACE="$2"shift 2;;--ip)IPADDR="$2"shift 2;;--gw)GATEWAY="$2"shift 2;;--dns)DNS="$2"shift 2;;--hostname)NEW_HOSTNAME="$2"shift 2;;*)usage;;esac
doneif [[ -z "$IFACE" && -z "$NEW_HOSTNAME" ]]; thenusage
fi# ------------------------
# Network Configuration
# ------------------------
if [[ -n "$IFACE" ]]; thenecho "=== Configuring interface $IFACE ==="CON_NAME=$(nmcli -t -f NAME,DEVICE con show | grep ":$IFACE" | cut -d: -f1)if [[ -z "$CON_NAME" ]]; thenecho "No existing connection found, creating..."CON_NAME="${IFACE}-manual"nmcli con add type ethernet ifname "$IFACE" con-name "$CON_NAME"fiecho "Using connection: $CON_NAME"[[ -n "$IPADDR" ]] && nmcli con mod "$CON_NAME" ipv4.addresses "$IPADDR" ipv4.method manual[[ -n "$GATEWAY" ]] && nmcli con mod "$CON_NAME" ipv4.gateway "$GATEWAY"[[ -n "$DNS" ]] && nmcli con mod "$CON_NAME" ipv4.dns "$DNS"nmcli con mod "$CON_NAME" connection.autoconnect yesnmcli con down "$CON_NAME" || truenmcli con up "$CON_NAME"echo "Network updated."
fi# ------------------------
# Hostname Configuration
# ------------------------
if [[ -n "$NEW_HOSTNAME" ]]; thenecho "=== Setting hostname to $NEW_HOSTNAME ==="hostnamectl set-hostname "$NEW_HOSTNAME"if grep -q "127.0.1.1" /etc/hosts; thensed -i "s/^127\.0\.1\.1.*/127.0.1.1\t$NEW_HOSTNAME/" /etc/hostselseecho -e "127.0.1.1\t$NEW_HOSTNAME" >> /etc/hostsfiecho "Hostname updated."
fiecho "✅ Done"

使用

root@debian-m1:~# bash setip.sh
Usage:setip.sh -i <iface> [--ip IP/PREFIX] [--gw GATEWAY] [--dns DNS]setip.sh --hostname HOSTNAMEroot@debian-m1:~# bash setip.sh --hostname debian-m
=== Setting hostname to debian-m ===
Hostname updated.
✅ Done