[newbie] System failure

[pierred1]

Hi to all

Last night, during my Linux session, we had a power shortage in our town.

And today, when I tried to reboot, I had these messages:

... check forced mode

... /dev/hda4 file system with errors

... Failed

...unexpected inconsistency; run fsck manually

and it returns in a terminal-type console at the root level

So, what to do next?

Thanks!