PuTTY is great for console work, if you really like using CLI to do everything, and it is great for running commands, of course. Windows has really made the computer world lazy, by giving us a lot of point and click.
Bare bones Linux isn't so forgiving.
What you need to do in regards to :sysinit:/usr/sbin/sshd, is to edit the text in the file itself. This can be done via PuTTY, and any other command line interface, but is a really ugly way to do it.
I recommend you use an FTP program to access the drive. This then gives you a Windows Explorer like method to view the file structure. I use fileZilla for this. Use the ssh username and password to login. You will need to be able to login as root.
To give root a password, in PuTTY, enter the command "passwd", you will be asked to create a new password for root, and to confirm that password. use this username and password in fileZilla.
FTP will let you copy the file to your windows drive for easy editing, without messing this up. When you're comfortable with what you have done, you can copy it back to your MyBook.
copy the file "inittab" from within the "etc" folder, to your windows desktop. Then open it with 'Notepad'. You will find it is just a text file. Linux uses this file to start or stop files at startup.
Look for a line
- Startup the system
at the bottom of that section type
This commands tells MyBook to start the ssh program, the next time it boots up, allowing you to ssh (or FTP if you use that method) in when ever you like.
Save the file back to the same location on your MyBook, and reboot.
Hope that helps…