Comment 12 for bug 108230

"Try a 'sudo update-initramfs'"

Terminal ask me:

krzaku@krzaku-desktop:~$ sudo update-initramfs
Password:
You must specify at least one of -c, -u, or -d.

Usage: /usr/sbin/update-initramfs [OPTION]...

Options:
 -k [version] Specify kernel version or 'all'
 -c Create a new initramfs
 -u Update an existing initramfs
 -d Remove an existing initramfs
 -t Take over a custom initramfs with this one
 -b Set alternate boot directory
 -v Be verbose
 -h This message

What I must choose ?