Root history not saving over reboot 8*

[Kamigishi Rei]

barbara wrote:
> I didn't tried pressing ctrl-d, but I can confirm that the history get lost even using shutdown as I use reboot only sometime in single user.
>
> BTW, isn't ctrl-d the combination for command completion?
>   
I think I mentioned ctrl-d explicitly just because it is *essential* to 
press it.
Ctrl-D performs a clean exit, given that the command line is empty.

If one issues "shutdown -r now", the shell is not terminated, as the 
shutdown command starts the shutdown process in the background - because 
"now" is not the only option and it basically schedules the shutdown to 
happen in 0 minutes.
After issuing "shutdown -r now" the user is returned to the shell, which 
remains active until it is killed during the shutdown process.
Hitting Ctrl-D immediately after issuing that command ensures that you 
have "exit"-ed the shell; if that was done before the shutdown kill 
sequence, and before the filesystems are remounted read-only - that's 
exactly why I said "immediately" - the shell *will* save the history file.

Using "reboot" or hitting Ctrl-Alt-Del on the console terminates all 
virtual consoles; if a console is terminated, the shell that was running 
on it exits on "Lost terminal" signal.

I do indeed hope that this time my explanation is detailed enough.

--
Kamigishi Rei
KREI-RIPE