/boot/grub/menu.lst is used to customize the grub bootloader. Similar to every configuration file, a hash # at the beginning of a line means it is a comment, for humans to read only. The application will ignore it. Well not quite. A special section in /boot/grub/menu.lst defaults the rule: the automagic kernel list.
### BEGIN AUTOMAGIC KERNELS LIST ## lines between the AUTOMAGIC KERNELS LIST markers will be modified ## by the debian update-grub script except for the default options below ##DO NOT UNCOMMENT THEM, Just edit them to your needs ## ## Start Default Options ## <snip> ## controls how many kernels should be put into the menu.lst ## only counts the first occurence of a kernel, not the ## alternative kernel options ## e.g. howmany=all ## howmany=7 # howmany=all <snip> ## ## End Default Options ##
2 hashes mean the line is a comment, 1 hash is a default option, no hash is a kernel entry. grub is special, it names drives and uses hashes its own way :)
