How do I find out if there will be a fsck during the next boot?
It depends on your filesystem, in addition to /forcefsck .
With ext2, ext3 and ext4 you can use
dumpe2fs -h /dev/diskname
Where diskname is for example sda1. You can determine name of your disk partition by running command
mount
Example output (only partly):
/dev/xvda1 on / type ext3 (rw,noatime,usrquota,errors=remount-ro)
Where xvda1 is name of root disk partition.
For dumpe2fs three interesting items are
Mount count: 9
Maximum mount count: 36
Next check after: Mon Feb 14 09:31:33 2011
Ubuntu will run fsck if mount count is equal or greater than maximum mount count, or if "next check after" is passed.
Starting in Ubuntu 11.04, this information will be shown in your /etc/motd
file, using the tool /usr/lib/update-notifier/update-motd-fsck-at-reboot, which checks ext2/3/4 partitions for both date-based and count-based auto-fsck events. You can run it manually like this:
sudo /usr/lib/update-notifier/update-motd-fsck-at-reboot --force
and it will report any partitions that will be checked on the next reboot.
There's a utility called showfsck that will tell you how many mounts are left until the next scheduled fsck
.