Hi,

If like me you dont want sshd to be running all the time.
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1. Open CROSH (CTRL-ALT-T)
2. type "shell"
3. type "sudo su"
4. enter your password
5. type "netstat -tupaln" to see that sshd is infact running
6. disable sshd temporarily just type "stop openssh-server" (if you run netstat again now, you will see its gone!)
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7. type "mount -o remount,rw /" to open the filesystem in read/write mode
8. type "mv /etc/init/openssh-server.conf /home/chronos/user/Downloads" to move the upstart job for sshd from autostarting to your Downloads folder instead.
9. type "exit" then "exit" then "exit" again to close CROSH
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10. Now sshd isnt running all the time in the background and Your security is better, well done! :P

Regards
Aubrey.