Practice 2: (VI)
1. Open Try.java by vi
2. Find ConfigFile by moving cursor
3. Append XXX to ConfigFile
4. Append multiple lines after the line including ConfigFile
5. Delete XXX
6. Copy the first 10 lines
7. Delete the first 10 lines
8. Save it
9. edit a new file with name Try1.java
10. Paster the copied lines in the file
11. Save it and exit
12. Open Try.java again
13. replace all import with IMPORT
14. Merge the file Try.java into the file Try1.java after the line including handle, save and exit. 



1.  vi Try.java
2.  use UP DOWN LEFT RIGHT  arrow to control cursor
3.  i 
4.  Esc to command mode 
5.  o
6.  Esc. move cursor to XXX, use x or 3s to delete XXX
7.  :1,10y 
8.  :w
9.  :e Try1.java
10. p
11. :wq  or :x
12. vi Try.java
13. :1,$s/import/IMPORT/g
14. :e Try1.java
    /handle/
    o
    :r Try.java
    :wq