https://blog.csdn.net/yenai2008/article/details/72722038?utm_source=itdadao&utm_medium=referral#nova-shell-%E6%96%87%E4%BB%B6%E7%AE%80%E8%A6%81%E5%88%86%E6%9E%90
https://blog.csdn.net/bc_vnetwork/article/details/53939946
原文：https://www.cnblogs.com/gremount/p/8870579.html