grub2 - How do I find out if I have a separate boot partition? - Ask Ubuntu


i have ubuntu 16.10 on laptop , i'm planning on dual-booting windows 7. problem is, after install windows 7, break grub. need know if have separate boot partition can restore grub correct place using ubuntu live usb.

this picture gparted. sda3 partition created windows 7.

enter image description here

you don't have separate /boot partition.

  • /dev/sda1 ubuntu root partition (mount point /, includes folders not mounted anywhere else, including /boot in case)

  • /dev/sda2and/dev/sda3are partitions windows, small 1 going hidden system partition while big 1 show yourc:` drive in windows.

  • /dev/sda4 not "real" partition data, it's so-called "extended partition" means it's container may hold number of logical volumes (which behave normal partitions again). extended partitions needed because msdos/mbr partition table can have 4 primary partitions or 3 primary , 1 extended (containing number of logical) partitions.

  • /dev/sda5 linux swap partition, used swap memory pages out of ram when gets full.

however, boot using grub, must install disk (/dev/sda) , not of partitions, using e.g. sudo grub-install /dev/sda. should done either running ubuntu installation on disk (which not possible need restore grub first) or chroot live ubuntu environment mounted ubuntu partition. works this:

  1. boot ubuntu live dvd or usb drive. should same architecture (32/64bit) , ideally same release installed ubuntu. select "try ubuntu without installing".

  2. open terminal (ctrl+alt+t) , run following commands mount ubuntu partition , chroot it:

    sudo mount /dev/sda1 /mnt x in /dev /dev/pts /proc /sys ; sudo mount --bind "$x" "/mnt/$x" ; done sudo chroot /mnt

  3. your terminal prompt should have changed now, logged in shell session root user ubuntu installation on disk, not live system. here type these commands reinstall grub disk. note don't need sudo here reason. also, second command omitted, doesn't hurt:

    grub-install /dev/sda update-grub

  4. exit chroot session again typing exit or pressing ctrl+d. unmount mounted partitions again:

    sudo umount -r /mnr

  5. exit terminal , reboot disk, ejecting live medium booted from.


Comments

Post a Comment

Popular posts from this blog

Windows XP installation, no previous version of Windows NT - Super User

i tried reinstall windows xp on lenovo s10e netbook, got error: no previous version of windows nt can found on computer. setup cannot verify qualify install upgrade product. quit setup, press f3 this notebook has no optical drive, installing xp via usb pendrive. old post. answering anyways in hope nobody ever need information since xp long since dead. xp , addional drivers: in order access harddrive need drives mass storage , drivers hdd controller. first build xp. second might be. if driver on xp installation cd not need anything. if driver not on standard cd have @ least 2 choices: create custom cd addition drives (slipstream), or load driver during setup. instructed installation process 'press f6 load additional drives'. @ stage press f6 , insert floppy relevant driver. xp , ahci in past used many storage devices. sorts of scsi, esda, ata etc etc. of these need drivers. time xp reached sp3 home systems had moved ata interface , there...
Read more

permissions - Mount is denied because the NTFS volume is already exclusively opened - Ask Ubuntu

i got stuck with: mount denied because ntfs volume exclusively opened. volume may mounted, or software may use identified example of 'fuser' command. and when run mount command this: sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) udev on /dev type devtmpfs (rw,nosuid,relatime,size=986036k,nr_inodes=214395,mode=755) devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000) tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=199708k,mode=755) /dev/sda9 on / type ext4 (rw,relatime,errors=remount-ro,data=ordered) securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime) tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k) tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755) cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,re...
Read more

16.04 - Errors were encountered while processing in python - Ask Ubuntu

i'm using ubuntu 16.04 desktop , facing below error while apt-get operation : reading package lists... done building dependency tree reading state information... done 0 upgraded, 0 newly installed, 1 reinstalled, 0 remove , 0 not upgraded. 10 not installed or removed. need 0 b/224 kb of archives. after operation, 0 b of additional disk space used. (reading database ... 120416 files , directories installed.) preparing unpack .../python2.7_2.7.12-1~16.04_amd64.deb ... unpacking python2.7 (2.7.12-1~16.04) on (2.7.12-1~16.04) ... processing triggers mime-support (3.59ubuntu1) ... setting python3 (3.5.1-3) ... running python rtupdate hooks python3.5... dpkg-query: package 'hplip-data' not installed use dpkg --info (= dpkg-deb --info) examine archive files, , dpkg --contents (= dpkg-deb --contents) list contents. traceback (most recent call last): file "/usr/bin/py3clean", line 210, in <module> main() file "/usr/bin/py3clean", line 196, in ...
Read more