Add extra IPs script

add-extra-ips.sh

#!/bin/bash

# Root kontrolü
if [[ $EUID -ne 0 ]]; then
    echo "❌ Lütfen bu scripti root olarak çalıştırın."
    exit 1
fi

# OS tespiti
if [ -f /etc/os-release ]; then
    . /etc/os-release
    OS=$ID
    VERSION=$VERSION_ID
fi

SUPPORTED=false
if [[ "$OS" == "ubuntu" && "$(echo "$VERSION >= 14.04" | bc)" -eq 1 ]]; then
    SUPPORTED=true
elif [[ "$OS" == "debian" ]]; then
    SUPPORTED=true
elif [[ "$OS" == "almalinux" || "$OS" == "rocky" || "$OS" == "centos" ]]; then
    if [[ "$VERSION" =~ ^(7|8|9)(\.[0-9]+)?$ ]]; then
        SUPPORTED=true
    fi
fi

if [[ "$SUPPORTED" != "true" ]]; then
    echo "❌ Unsupported OS: $OS $VERSION"
    exit 1
fi

# IP doğrulama fonksiyonları
is_valid_ipv4() { [[ "$1" =~ ^([0-9]{1,3}\.){3}[0-9]{1,3}/[0-9]{1,2}$ ]]; }
is_valid_ipv6() { [[ "$1" =~ ^([0-9a-fA-F:]+:+)+[0-9a-fA-F]+/[0-9]{1,3}$ ]]; }

# IP girişi
echo "📝 Eklemek istediğiniz IP adreslerini girin (örnek: 192.168.1.10/24 veya 2001:db8::1/64)"
echo "✔️ Girişi bitirmek için Ctrl+D tuşlayın:"
IP_LIST=()
while read -r ip; do
    [[ -z "$ip" ]] && continue
    if is_valid_ipv4 "$ip" || is_valid_ipv6 "$ip"; then
        IP_LIST+=("$ip")
    else
        echo "⚠️ Geçersiz IP atlandı: $ip"
    fi
done

if [[ ${#IP_LIST[@]} -eq 0 ]]; then
    echo "⚠️ Geçerli IP girilmedi. Çıkılıyor."
    exit 1
fi

# Varsayılan arayüz
IFACE=$(ip route | grep default | awk '{print $5}' | head -n1)
if [[ -z "$IFACE" ]]; then
    echo "❌ Ağ arayüzü tespit edilemedi."
    exit 1
fi
echo "🔌 IP'ler $IFACE arayüzüne eklenecek..."

# AlmaLinux/Rocky 8+ ve CentOS 8+ özel durum (NetworkManager kullanıyor)
if [[ ("$OS" == "almalinux" || "$OS" == "rocky" || "$OS" == "centos") && "$VERSION" =~ ^(8|9)(\.[0-9]+)?$ ]]; then
    COUNT=0
    for ip in "${IP_LIST[@]}"; do
        if is_valid_ipv4 "$ip"; then
            nmcli connection modify "$IFACE" +ipv4.addresses "$ip"
            nmcli connection modify "$IFACE" ipv4.method manual
        elif is_valid_ipv6 "$ip"; then
            nmcli connection modify "$IFACE" +ipv6.addresses "$ip"
            nmcli connection modify "$IFACE" ipv6.method manual
        fi
        ((COUNT++))
    done
    nmcli connection up "$IFACE"

# Ubuntu/Debian (netplan kullanan sürümler)
elif [[ "$OS" == "ubuntu" && "$(echo "$VERSION >= 17.10" | bc)" -eq 1 ]] || [[ "$OS" == "debian" && -d "/etc/netplan" ]]; then
    cd /etc/netplan || { echo "❌ /etc/netplan dizini bulunamadı!"; exit 1; }

    # 00-* dosyaları öncelikli ara
    NETPLAN_FILE=$(ls 00-*.yaml 00-*.yml 2>/dev/null | head -1)
    [[ -z "$NETPLAN_FILE" ]] && NETPLAN_FILE=$(ls *.yaml *.yml 2>/dev/null | head -1)

    if [[ -z "$NETPLAN_FILE" ]]; then
        NETPLAN_FILE="99-extra-ips.yaml"
        echo "📄 Yeni netplan dosyası oluşturuluyor: $NETPLAN_FILE"
    else
        echo "📄 Mevcut netplan dosyası düzenleniyor: $NETPLAN_FILE"
    fi

    # Yedek al
    [[ -f "$NETPLAN_FILE" ]] && cp "$NETPLAN_FILE" "$NETPLAN_FILE.bak.$(date +%s)"

    # --- DÜZELTİLEN KISIM ---
    # Mevcut IP'leri oku – yalnızca CIDR içeren satırlar alınır
    EXISTING_IPS=$(grep -A 20 "^ *addresses:" "$NETPLAN_FILE" \
                   | grep "^\s*-" \
                   | grep '/' \
                   | sed 's/^\s*-\s*//')

    # Gateway ve nameserver bilgileri
    GATEWAY=$(grep "gateway4:" "$NETPLAN_FILE" | awk '{print $2}')
    if grep -q "nameservers:" "$NETPLAN_FILE"; then
        NAMESERVERS=$(grep -A 10 "nameservers:" "$NETPLAN_FILE" \
                      | grep "^\s*-" \
                      | sed 's/^\s*-\s*//')
        HAS_NAMESERVERS=true
    else
        HAS_NAMESERVERS=false
    fi
    # --- /DÜZELTİLEN KISIM ---

    # Yeni netplan dosyasını yaz
    cat > "$NETPLAN_FILE" <<EOF
# Generated by IP add script
network:
  ethernets:
    $IFACE:
      addresses:
EOF

    # Eski + yeni IP'leri ekle
    [[ -n "$EXISTING_IPS" ]] && while read -r old; do
        [[ -n "$old" ]] && echo "        - $old" >> "$NETPLAN_FILE"
    done <<< "$EXISTING_IPS"

    for ip in "${IP_LIST[@]}"; do
        echo "        - $ip" >> "$NETPLAN_FILE"
    done

    [[ -n "$GATEWAY" ]] && echo "      gateway4: $GATEWAY" >> "$NETPLAN_FILE"

    if [[ "$HAS_NAMESERVERS" == "true" && -n "$NAMESERVERS" ]]; then
        echo "      nameservers:" >> "$NETPLAN_FILE"
        echo "        addresses:" >> "$NETPLAN_FILE"
        while read -r ns; do
            [[ -n "$ns" ]] && echo "          - $ns" >> "$NETPLAN_FILE"
        done <<< "$NAMESERVERS"
        echo "        search: []" >> "$NETPLAN_FILE"
    fi

    echo "  version: 2" >> "$NETPLAN_FILE"

# Ubuntu/Debian eski yapı
elif [[ "$OS" == "ubuntu" || "$OS" == "debian" ]]; then
    IFACE_FILE="/etc/network/interfaces.d/$IFACE.cfg"
    cp "$IFACE_FILE" "$IFACE_FILE.bak.$(date +%s)" 2>/dev/null
    cat > "$IFACE_FILE" <<EOF
auto $IFACE
iface $IFACE inet manual
EOF
    for ip in "${IP_LIST[@]}"; do
        if is_valid_ipv4 "$ip"; then
            echo "up ip addr add $ip dev $IFACE" >> "$IFACE_FILE"
        elif is_valid_ipv6 "$ip"; then
            echo "up ip -6 addr add $ip dev $IFACE" >> "$IFACE_FILE"
        fi
    done

# RHEL/CentOS/AlmaLinux 7 klasik yapı
else
    IFCFG="/etc/sysconfig/network-scripts/ifcfg-$IFACE"
    cp "$IFCFG" "$IFCFG.bak.$(date +%s)" 2>/dev/null
    COUNT=0
    for ip in "${IP_LIST[@]}"; do
        if is_valid_ipv4 "$ip"; then
            echo "IPADDR$COUNT=${ip%/*}" >> "$IFCFG"
            echo "PREFIX$COUNT=${ip#*/}" >> "$IFCFG"
        elif is_valid_ipv6 "$ip"; then
            echo "IPV6ADDR$COUNT=$ip" >> "$IFCFG"
        fi
        ((COUNT++))
    done
fi

# Ağ servisini yeniden başlat
echo "🔄 Ağ servisi yeniden başlatılıyor..."
if [[ "$OS" == "ubuntu" && "$(echo "$VERSION >= 17.10" | bc)" -eq 1 ]] || [[ "$OS" == "debian" && -d "/etc/netplan" ]]; then
    echo "🔧 Netplan uygulanıyor..."
    netplan apply
elif [[ "$OS" == "ubuntu" || "$OS" == "debian" ]]; then
    echo "🔧 Ağ servisi yeniden başlatılıyor (legacy)..."
    systemctl restart networking || { ifdown "$IFACE"; ifup "$IFACE"; }
elif [[ "$OS" =~ ^(centos|rocky|almalinux)$ && "$VERSION" =~ ^7(\.[0-9]+)?$ ]]; then
    echo "🔧 network.service yeniden başlatılıyor..."
    systemctl restart network
elif [[ ("$OS" == "rocky" || "$OS" == "almalinux" || "$OS" == "centos") && "$VERSION" =~ ^(8|9)(\.[0-9]+)?$ ]]; then
    echo "🔧 NetworkManager yeniden başlatılıyor..."
    systemctl reload NetworkManager || systemctl restart NetworkManager
else
    echo "⚠️ Ağ servisi elle yeniden başlatılmalı."
fi

# Sonuç
echo "✅ Eklenen IP adresleri:"
for ip in "${IP_LIST[@]}"; do
    echo " - $ip"
done

⚠️ Disclaimer:

This script makes changes to your network configuration files and restarts networking services.
Please make sure to back up your configuration before running it — especially on production systems.
By using this script, you acknowledge that you do so at your own risk, and the author cannot be held responsible for any unintended consequences, including loss of connectivity.

---

🖥️ Usage on server:

curl -o add-extra-ips.sh https://gist.githubusercontent.com/boranbar/1a982967faff0944f33d721a889b36f6/raw/add-extra-ips.sh
chmod +x add-extra-ips.sh
./add-extra-ips.sh

💡 Note: The script checks for root privileges at the beginning, so you don't need to use sudo.

---

📦 Supported Operating Systems:

• Ubuntu 14.04 and newer (Netplan and ifupdown supported)
• Debian (with or without Netplan)
• AlmaLinux 8 / 9
• RockyLinux 8 / 9
• CentOS 7

---

🌐 Supports IPv4 and IPv6!

You will be prompted to enter one or more IP addresses. You can mix IPv4 and IPv6.

✅ Example entries:

192.168.100.10/24
2001:db8::10/64

To finish input, press Ctrl + D.

---

⚙️ The script:

• Validates IP format (IPv4 / IPv6)
• Detects your OS and selects proper configuration method
• Applies the changes and restarts the network
• Backs up any modified config files

Feel free to fork and improve it further!

#!/bin/bash

# Root kontrolü
if [[ $EUID -ne 0 ]]; then
    echo "❌ Bu scripti root olarak çalıştırın."
    exit 1
fi

# Kullanım bilgisi
usage() {
    echo "Kullanım:"
    echo "  $0 IP1 IP2 IP3 ...              # Argüman olarak"
    echo "  $0 -f dosya.txt                 # Dosyadan oku"
    echo "  echo 'IP1 IP2' | $0 -           # Stdin'den oku"
    echo ""
    echo "Örnekler:"
    echo "  $0 185.83.147.152 185.83.147.153 185.83.147.154"
    echo "  $0 -f ip_listesi.txt"
    echo "  $0 185.83.147.152/24            # CIDR ile"
    echo ""
    echo "Opsiyonlar:"
    echo "  -m, --mask MASK    Varsayılan subnet mask (default: 24)"
    echo "  -i, --iface IFACE  Ağ arayüzü (default: otomatik)"
    echo "  -f, --file FILE    IP listesi dosyası"
    echo "  -h, --help         Bu yardım mesajı"
    exit 1
}

# Varsayılanlar
DEFAULT_MASK="24"
IFACE=""
IP_FILE=""
IP_LIST=()

# Argüman parse
while [[ $# -gt 0 ]]; do
    case $1 in
        -m|--mask)
            DEFAULT_MASK="$2"
            shift 2
            ;;
        -i|--iface)
            IFACE="$2"
            shift 2
            ;;
        -f|--file)
            IP_FILE="$2"
            shift 2
            ;;
        -h|--help)
            usage
            ;;
        -)
            # Stdin'den oku
            while read -r line; do
                for ip in $line; do
                    [[ -n "$ip" ]] && IP_LIST+=("$ip")
                done
            done
            shift
            ;;
        -*)
            echo "❌ Bilinmeyen opsiyon: $1"
            usage
            ;;
        *)
            IP_LIST+=("$1")
            shift
            ;;
    esac
done

# Dosyadan oku
if [[ -n "$IP_FILE" ]]; then
    if [[ ! -f "$IP_FILE" ]]; then
        echo "❌ Dosya bulunamadı: $IP_FILE"
        exit 1
    fi
    while read -r line; do
        # Yorum ve boş satırları atla
        [[ "$line" =~ ^#.*$ || -z "$line" ]] && continue
        for ip in $line; do
            [[ -n "$ip" ]] && IP_LIST+=("$ip")
        done
    done < "$IP_FILE"
fi

# IP kontrolü
if [[ ${#IP_LIST[@]} -eq 0 ]]; then
    echo "❌ Hiç IP adresi girilmedi!"
    usage
fi

# OS tespiti
if [ -f /etc/os-release ]; then
    . /etc/os-release
    OS=$ID
    VERSION=$VERSION_ID
fi

# Arayüz tespiti
if [[ -z "$IFACE" ]]; then
    IFACE=$(ip route | grep default | awk '{print $5}' | head -n1)
fi

if [[ -z "$IFACE" ]]; then
    echo "❌ Ağ arayüzü tespit edilemedi. -i ile belirtin."
    exit 1
fi

echo "🔌 Arayüz: $IFACE"
echo "📝 Eklenecek IP sayısı: ${#IP_LIST[@]}"

# IP doğrulama ve CIDR ekleme
VALID_IPS=()
for ip in "${IP_LIST[@]}"; do
    # Boşlukları temizle
    ip=$(echo "$ip" | tr -d '[:space:]')
    [[ -z "$ip" ]] && continue
    
    # CIDR yoksa ekle
    if [[ ! "$ip" =~ "/" ]]; then
        ip="$ip/$DEFAULT_MASK"
    fi
    
    # IPv4 doğrulama
    if [[ "$ip" =~ ^([0-9]{1,3}\.){3}[0-9]{1,3}/[0-9]{1,2}$ ]]; then
        VALID_IPS+=("$ip")
        echo "  ✓ $ip"
    # IPv6 doğrulama
    elif [[ "$ip" =~ ^([0-9a-fA-F:]+:+)+[0-9a-fA-F]+/[0-9]{1,3}$ ]]; then
        VALID_IPS+=("$ip")
        echo "  ✓ $ip"
    else
        echo "  ✗ Geçersiz: $ip"
    fi
done

if [[ ${#VALID_IPS[@]} -eq 0 ]]; then
    echo "❌ Geçerli IP bulunamadı!"
    exit 1
fi

echo ""
echo "🚀 ${#VALID_IPS[@]} IP ekleniyor..."

# ============================================
# AlmaLinux/Rocky/CentOS 8+ (NetworkManager)
# ============================================
if [[ ("$OS" == "almalinux" || "$OS" == "rocky" || "$OS" == "centos") && "$VERSION" =~ ^(8|9)(\.[0-9]+)?$ ]]; then
    echo "📦 NetworkManager (nmcli) kullanılıyor..."
    
    for ip in "${VALID_IPS[@]}"; do
        if [[ "$ip" =~ ":" ]]; then
            nmcli connection modify "$IFACE" +ipv6.addresses "$ip"
        else
            nmcli connection modify "$IFACE" +ipv4.addresses "$ip"
        fi
    done
    
    nmcli connection up "$IFACE" 2>/dev/null || nmcli connection reload

# ============================================
# Ubuntu 17.10+ / Debian with Netplan
# ============================================
elif [[ "$OS" == "ubuntu" && "$(echo "$VERSION >= 17.10" | bc)" -eq 1 ]] || [[ "$OS" == "debian" && -d "/etc/netplan" ]]; then
    echo "📦 Netplan kullanılıyor..."
    
    cd /etc/netplan || { echo "❌ /etc/netplan bulunamadı!"; exit 1; }
    
    # Netplan dosyasını bul
    NETPLAN_FILE=$(ls 00-*.yaml 00-*.yml 2>/dev/null | head -1)
    [[ -z "$NETPLAN_FILE" ]] && NETPLAN_FILE=$(ls *.yaml *.yml 2>/dev/null | head -1)
    [[ -z "$NETPLAN_FILE" ]] && NETPLAN_FILE="99-extra-ips.yaml"
    
    echo "📄 Dosya: $NETPLAN_FILE"
    
    # Yedek al
    [[ -f "$NETPLAN_FILE" ]] && cp "$NETPLAN_FILE" "$NETPLAN_FILE.bak.$(date +%s)"
    
    # Mevcut IP'leri oku
    EXISTING_IPS=""
    if [[ -f "$NETPLAN_FILE" ]]; then
        EXISTING_IPS=$(grep -A 50 "addresses:" "$NETPLAN_FILE" | grep "^\s*-" | grep "/" | sed 's/^\s*-\s*//' | head -20)
        GATEWAY=$(grep "gateway4:" "$NETPLAN_FILE" | awk '{print $2}' | head -1)
        GATEWAY6=$(grep "gateway6:" "$NETPLAN_FILE" | awk '{print $2}' | head -1)
        
        if grep -q "nameservers:" "$NETPLAN_FILE"; then
            NAMESERVERS=$(grep -A 10 "nameservers:" "$NETPLAN_FILE" | grep "^\s*-" | sed 's/^\s*-\s*//')
        fi
    fi
    
    # Yeni config yaz
    cat > "$NETPLAN_FILE" <<EOF
network:
  version: 2
  ethernets:
    $IFACE:
      addresses:
EOF
    
    # Mevcut IP'leri ekle
    if [[ -n "$EXISTING_IPS" ]]; then
        while read -r old_ip; do
            [[ -n "$old_ip" ]] && echo "        - $old_ip" >> "$NETPLAN_FILE"
        done <<< "$EXISTING_IPS"
    fi
    
    # Yeni IP'leri ekle
    for ip in "${VALID_IPS[@]}"; do
        echo "        - $ip" >> "$NETPLAN_FILE"
    done
    
    # Gateway
    [[ -n "$GATEWAY" ]] && echo "      gateway4: $GATEWAY" >> "$NETPLAN_FILE"
    [[ -n "$GATEWAY6" ]] && echo "      gateway6: $GATEWAY6" >> "$NETPLAN_FILE"
    
    # Nameservers
    if [[ -n "$NAMESERVERS" ]]; then
        echo "      nameservers:" >> "$NETPLAN_FILE"
        echo "        addresses:" >> "$NETPLAN_FILE"
        while read -r ns; do
            [[ -n "$ns" ]] && echo "          - $ns" >> "$NETPLAN_FILE"
        done <<< "$NAMESERVERS"
    fi
    
    netplan apply

# ============================================
# Eski Ubuntu/Debian (interfaces)
# ============================================
elif [[ "$OS" == "ubuntu" || "$OS" == "debian" ]]; then
    echo "📦 /etc/network/interfaces kullanılıyor..."
    
    IFACE_FILE="/etc/network/interfaces.d/$IFACE-extra.cfg"
    
    for ip in "${VALID_IPS[@]}"; do
        if [[ "$ip" =~ ":" ]]; then
            echo "up ip -6 addr add $ip dev $IFACE" >> "$IFACE_FILE"
        else
            echo "up ip addr add $ip dev $IFACE" >> "$IFACE_FILE"
        fi
    done
    
    systemctl restart networking 2>/dev/null || { ifdown "$IFACE"; ifup "$IFACE"; }

# ============================================
# CentOS/RHEL 7 (ifcfg)
# ============================================
elif [[ "$OS" =~ ^(centos|rhel|rocky|almalinux)$ && "$VERSION" =~ ^7 ]]; then
    echo "📦 ifcfg dosyası kullanılıyor..."
    
    IFCFG="/etc/sysconfig/network-scripts/ifcfg-$IFACE"
    [[ -f "$IFCFG" ]] && cp "$IFCFG" "$IFCFG.bak.$(date +%s)"
    
    # Mevcut en yüksek index'i bul
    COUNT=$(grep -c "^IPADDR" "$IFCFG" 2>/dev/null || echo 0)
    
    for ip in "${VALID_IPS[@]}"; do
        if [[ ! "$ip" =~ ":" ]]; then
            echo "IPADDR$COUNT=${ip%/*}" >> "$IFCFG"
            echo "PREFIX$COUNT=${ip#*/}" >> "$IFCFG"
        else
            echo "IPV6ADDR_SECONDARIES=\"\${IPV6ADDR_SECONDARIES} $ip\"" >> "$IFCFG"
        fi
        ((COUNT++))
    done
    
    systemctl restart network

# ============================================
# Desteklenmeyen OS - Sadece geçici ekle
# ============================================
else
    echo "⚠️ OS tanınmadı, IP'ler geçici olarak ekleniyor..."
    
    for ip in "${VALID_IPS[@]}"; do
        if [[ "$ip" =~ ":" ]]; then
            ip -6 addr add "$ip" dev "$IFACE" 2>/dev/null
        else
            ip addr add "$ip" dev "$IFACE" 2>/dev/null
        fi
    done
    
    echo "⚠️ Bu IP'ler reboot sonrası kaybolacak!"
fi

# ============================================
# Sonuç
# ============================================
echo ""
echo "✅ İşlem tamamlandı!"
echo "📋 Eklenen IP'ler:"
for ip in "${VALID_IPS[@]}"; do
    echo "   • $ip"
done

echo ""
echo "🔍 Doğrulama:"
ip addr show "$IFACE" | grep -E "inet6? " | head -10

Usage

Method 1: Here Document (Recommended)

Paste multiple IPs directly in the terminal:

./add-extra-ips.sh - <<'EOF'
192.168.1.10
192.168.1.11
192.168.1.12
192.168.1.13
EOF

With custom subnet mask (e.g., /25):

./add-extra-ips.sh -m 25 - <<'EOF'
192.168.1.10
192.168.1.11
192.168.1.12
EOF

Method 2: Text File

Create a file with IP addresses (one per line):

cat > ips.txt <<'EOF'
192.168.1.10
192.168.1.11
192.168.1.12
192.168.1.13
EOF

Then run:

./add-extra-ips.sh -f ips.txt

With custom subnet mask:

./add-extra-ips.sh -m 25 -f ips.txt

Options

Option	Description
-m, --mask	Subnet mask (default: 24)
-i, --iface	Network interface (default: auto-detect)
-f, --file	Read IPs from file
-h, --help	Show help message