PVE实用命令

### 将镜像转换为虚拟磁盘
```shell
qm importdisk 102 /var/lib/vz/template/iso/openwrt.img local-lvm
```
### cpupower 命令
```shell
cpupower -c all frequency-set -g powersave
cpupower -c all frequency-set -g performance
cpupower frequency-info
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
```
### 强制停止虚拟机
```shell
ls -l /run/lock/qemu-server
rm -f /run/lock/qemu-server/lock-101.conf
qm unlock 101
qm stop 101
qm status 101
```
### 自动MSS，假设PPPOE虚接口是pppoe0
```shell
iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o pppoe0 -j TCPMSS --clamp-mss-to-pmtu
ip6tables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o pppoe0 -j TCPMSS --clamp-mss-to-pmtu
```
### 手动指定MSS，假设PPPOE虚接口是pppoe0
```shell
iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o pppoe0 -j TCPMSS --set-mss 1452
ip6tables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o pppoe0 -j TCPMSS --set-mss 1432
```
### 查看网卡错误信息
```bash
ethtool -S enp2s0 | grep -i "error"
```
### 查看网卡缓冲区信息
```bash
ethtool -g enp2s0
```
### 调整网卡缓冲区大小
```bash
ethtool -G enp2s0 rx 512
```