4. vim jail & system cracking
- Ctrl + z : escape without exiting vim program
- password file : /etc/passwd /etc/shadow
- using vim more : http://developersnote.blogspot.com/2011/01/vi.html
5. hidden key in BMP file
- vim command: wc (number of lines, words, characters of a file), du(size of file)
- hexedit (hex editor) & bmp file format