1：grep -r “指定内容” 目录
grep -r "get_next_hash" ~/Download/hotspot-69087d08d473
2：grep -r -l “指定内容” 目录
grep -r -l "get_next_hash" ~/Download/hotspot-69087d08d473
3：find 文件目录 -type f|xargs grep “指定内容”
find ~/Download/hotspot-69087d08d473/ -type f|xargs grep "get_next_hash"