Update 'README.md'

README.md

@@ -135,13 +135,53 @@ drwxr-xr-x.   1 root root  202 Dec 26 21:31 usr
 drwxr-xr-x.   1 root root  200 Jan  3 20:37 var
 ```
 
-- `cd` -
+### `cd`
+
+Change current working directory
+
+```bash
+/home/test_user $ cd ..
+/home $ cd /etc
+/etc $
+```
+
+### `pwd`
+
+Returns current working directory
+
+```bash
+/home/test_user $ pwd
+/home/test_user
+```
+
+
+### `cat`
+
+Lists file
+
+```bash
+/home/test_user $ cat todo.txt
+1. first task
+2. next tssk
+3. last task
+```
+
+### `tac`
+
+Lists file in reverse order
+
+```bash
+/home/test_user $ tac todo.txt
+3. last task
+2. next tssk
+1. first task
+```
+
+
+### `less`
+
 
 
-- `cat` -
-- `tac` - 
-- `more` -
-- `less` -
 - `cut` -
 - `head` -
 - `tail` -