方法一
[root@myhost ~]# ls -l
total 56
drwxr-xr-x. 2 root root 4096 Jul 2 09:48 a
-rw——-. 1 root root 1079 Jun 9 07:12 anaconda-ks.cfg
drwxr-xr-x. 2 root root 4096 Jul 2 22:10 b
-rw-r–r–. 1 root root 0 Jul 6 15:17 c.txt
drwxr-xr-x. 2 root root 4096 Jul 5 22:20 data
-rw-r–r–. 1 root root 5 Jul 3 08:22 d.txt
-rw-r–r–. 1 root root 23072 Jun 9 07:12 install.log
-rw-r–r–. 1 root root 6240 Jun 9 07:11 install.log.syslog
[root@myhost ~]# ls -l|grep ^d // ^代表以什么什么开头
drwxr-xr-x. 2 root root 4096 Jul 2 09:48 a
drwxr-xr-x. 2 root root 4096 Jul 2 22:10 b
drwxr-xr-x. 2 root root 4096 Jul 5 22:20 data
方法二：
[root@myhost ~]# ls -Fl
total 56
drwxr-xr-x. 2 root root 4096 Jul 2 09:48 a/
-rw——-. 1 root root 1079 Jun 9 07:12 anaconda-ks.cfg
drwxr-xr-x. 2 root root 4096 Jul 2 22:10 b/
-rw-r–r–. 1 root root 0 Jul 6 15:17 c.txt
drwxr-xr-x. 2 root root 4096 Jul 5 22:20 data/
-rw-r–r–. 1 root root 5 Jul 3 08:22 d.txt
-rw-r–r–. 1 root root 23072 Jun 9 07:12 install.log
-rw-r–r–. 1 root root 6240 Jun 9 07:11 install.log.syslog
[root@myhost ~]# ls -Fl|grep /$
drwxr-xr-x. 2 root root 4096 Jul 2 09:48 a/
drwxr-xr-x. 2 root root 4096 Jul 2 22:10 b/
drwxr-xr-x. 2 root root 4096 Jul 5 22:20 data/
方法三：
[root@myhost ~]# find ./ -type d
./
./b
./a
./data
