Thread: Grub2 Buildup in /dev/sda?

i have installed , reinstalled various different derivatives of ubuntu on netbook, trying see ones work best, given limited hardware. each time installed one, told install grub2 bootloader in /dev/sda of harddrive. after preforming many installations, question is, each installation delete old bootloader? or there 5 or 6 bootloaders somehow spread throughout /dev/sda? if so, there way rid of them without reformatting entire computer's harddrive?

thanks.

surenot,

welcome ubuntu forums.

each ubuntu/linux os uses grub 2 installs it's own boot files in os's partition. majority of files installed in /boot/grub folder, configuration scripts stored in /etc/grub.d , configuration file (/etc/default/grub).

in addition, grub 2 writes information drive's mbr. information points grub files on os's partition.

when install new linux os, grub files in other versions not touched. on other hand, information in drive's mbr overwritten default. mbr information rewritten point new installation's partition , grub files.

in os's , earlier versions of ubuntu, there option not install grub 2, left mbr information pointing older installation. in recent ubuntu releases, mbr overwritten unless user takes unusual steps prevent it.

easiest thing allow ubuntu install normally, boot desired default os , reinstall grub there. rewrite mbr point os in use.

desired ubuntu os, use these commands make os 1 controlling grub/booting: x drive letter (a, b, c in sda, sdb, sdc).

code:

sudo grub-install /dev/sdx sudo update-grub

this general overview. if want hide of existing os menu options, easiest way tweak menu grub customizer. it's gui app lets make lots of changes grub menu. click "customizer" link in signature line.

added:

note: may see additional kernels listed same os, not same seeing multiple os's. these older kernels stored away in submenu, in older releases older kernels of same release retained in menu newer kernels installed.

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