1.repo sync ，，，报 RPC 失败。curl 56 GnuTLS recv error (-9): Error decoding the received TLS packet
解决：
设置驱动最大传输单元
sudo ifconfig enp0s3 mtu 14000
git设置
sudo apt-get install gnutls-bin
git config --global http.sslVerify false
git config --global http.postBuffer 1048576000
