1. Check the number of files under the current directory
ls -l |grep "^-" | wc -l
2, the number of files that contains subdirectories under the current directory View
ls -lR |grep "^-" | wc -l
3, view the current directory number directory
ls -l |grep "^d" | wc -l
4, view the current directory that contains the number of subdirectories under the directory
ls -lR |grep "^d" | wc -l