How to make applications run on nios2linux

The initramfs is a read/writable root fs. It is not like romfs, which is read-only.

eg, to mount jffs2 "mount -t jffs2 /dev/mtdblock0 /mnt"

will mount a mtd block device (0) to dir /mnt, /mnt is the mount point, you can use other dir for it.

(you can even remount root fs with switch-root, but probably you won't)

eg, to mount nfs "mount -t nfs 192.168.1.2:/home /home"

will mount the /home dir from nfs server 192.168.1.2 to dir /home .

eg, to mount vfat on ide/cf "mount -t vfat /dev/hda1 /var/www"

will mount ide part 1, which is formatted as vfat, to dir /var/www