# linux网络调试常用指令


### 清空arp缓存
```
ip -s -s neigh flush all
```

### SNAT
```
iptables -t nat -I POSTROUTING -s 192.168.23.232/32 -j SNAT --to 192.168.23.1
```

### shell设置当前目录为环境变量
```
export PYTHONPATH=$(pwd)
```

### iptables日志调试
```
iptables -t mangle -I PREROUTING -p udp --dport 5060 -j log
```