Git – fatal: Unable to create ‘/.git/index.lock’: File exists.
fatal: Unable to create ‘/path/my_proj/.git/index.lock’: File exists.
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.
可以试着删除 index.lock
rm -f ./.git/index.lock