We can use the below commands to display only the directory names

$ echo */
Scripts/ unix-commands-cheat-sheet_files/

$ printf “%s\n” */
Scripts/
unix-commands-cheat-sheet_files/

$ ls -d */
Scripts/  unix-commands-cheat-sheet_files/

$ ls -l | grep ^d
drwxr-xr-x 2 kamaraj kamaraj    4096 2011-03-11 21:25 Scripts
drwxr-xr-x 4 kamaraj kamaraj    4096 2011-02-09 01:11 unix-commands-cheat-sheet_file

$ find . -maxdepth 1 -type d
.
./unix-commands-cheat-sheet_files
./Scripts

In linux we can easily get the last executed command using the below command.

echo “!!”

execute the last executed command by simply typing two !!

!!

you can easily redirect the output into one more script file.

echo “!!” > test.sh

Create a simple shell script as follows.

echo “Hello World”

save the file as hello_world

And now you can see the file permission using the ls -l command.

$ ls -l hello_world
-rw-r–r– 1 kamaraj kamaraj 19 2011-03-11 20:40 hello_world

Now type sh hello_world in the terminal.

$ sh hello_world
hello world