shell脚本快速检查192.168.1网段ip是否在用的方法

#!/bin/bash
# 定义网段
NETWORK="192.168.1"
# 定义超时时间（秒）
TIMEOUT=1
# 定义并行扫描的 IP 数量
PARALLEL=20
# 日志函数
function log_info() {
  echo -e "[INFO] $1"
}
function log_success() {
  echo -e "\033[32m[SUCCESS] $1\033[0m"
}
function log_error() {
  echo -e "\033[31m[ERROR] $1\033[0m"
}
# 检查单个 IP 是否在线
function check_ip() {
  local ip=$1
  if ping -c 1 -W "$TIMEOUT" "$ip" &> /dev/null; then
    log_success "IP $ip is online"
  else
    log_error "IP $ip is offline"
  fi
}
# 主函数
function main() {
  log_info "Scanning network $NETWORK.0/24..."
  # 使用循环遍历 1-254 的 IP 地址
  for i in {1..254}; do
    ip="$NETWORK.$i"
    check_ip "$ip" &
    # 控制并行数量
    if [[ $(jobs -r -p | wc -l) -ge $PARALLEL ]]; then
      wait -n
    fi
  done
  # 等待所有后台任务完成
  wait
}
# 执行主函数
main

chmod +x scan_network.sh

./scan_network.sh

[INFO] Scanning network 192.168.1.0/24...
[SUCCESS] IP 192.168.1.1 is online
[ERROR] IP 192.168.1.2 is offline
[SUCCESS] IP 192.168.1.3 is online
[ERROR] IP 192.168.1.4 is offline
...

./scan_network.sh 192.168.1.10 192.168.1.20

START_IP=${1:-1}
END_IP=${2:-254}
for i in $(seq "$START_IP" "$END_IP"); do
  ip="$NETWORK.$i"
  check_ip "$ip" &
done

LOG_FILE="scan_results.txt"
function log_success() {
  echo -e "\033[32m[SUCCESS] $1\033[0m"
  echo "[SUCCESS] $1" >> "$LOG_FILE"
}
function log_error() {
  echo -e "\033[31m[ERROR] $1\033[0m"
  echo "[ERROR] $1" >> "$LOG_FILE"
}

fping -c 1 -t "$TIMEOUT" "$ip" &> /dev/null