/$ ls -d *
bin
boot
data
dev
etc
/$ find . -type d -maxdepth 1 . ./home ./run ./tmp ./opt ./usr
如果不加-maxdepth 参数的话那么将会有无穷多目录被列出来。
/$ ls -F | grep '/$' boot/ data/ dev/ etc/
使用linux管道命令,grep查找 '/$' 以/结尾的,也即是目录
/$ ls -l | grep '^d' dr-xr-xr-x. 5 root root 4096 Jul 22 16:34 boot drwxr-xr-x 5 root root 4096 Jul 22 16:25 data drwxr-xr-x 19 root root 2960 Jul 27 12:44 dev drwxr-xr-x. 83 root root 12288 Jul 22 20:51 etc drwxr-xr-x. 3 root root 4096 Apr 11 2018 home