git的一些常见错误与解决方法

当我在执行 git add xxxfile 或者 git commit xxxfile 出现如下问题：
第一个问题：If no other git process is currently running, this probably means a
git process crashed in this repository earlier. Make sure no other git
process is running and remove the file manually to continue.
解决办法：rm -f ./.git/index.lock