Bootable Linux USB stick: Difference between revisions

Bootable Linux USB stick (edit)

Revision as of 12:31, 29 March 2016

101 bytes added , 29 March 2016

→‎adjust the USB-stick for UEFI/EFI boot (before reboot from chroot environment)

Karsten

Bureaucrats

47

edits

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   chroot /mnt/sysimage
-install updates:
+install Fedora updates:
   dnf -y update    # dnf on FC23 is successor to yum
 configure grub2 for (U)EFI systems:
-disable auto recognition of other installed Operating systems (specific to current computer), and
-update grub2-efi.cfg to use uuid's (devices not consistent across different machines)
+*disable auto recognition of other installed Operating systems (specific to current computer), and
+*update grub2-efi.cfg
   echo 'GRUB_DISABLE_OS_PROBER=”true”' >> /etc/default/grub
   grub2-mkconfig -o /etc/grub2-efi.cfg
-(switches from devices to uuid and removes boot entries for other OS's)
+(last step automatically puts UUID's to recognise the boot device in grub2-efi.cfg ; default after fresh Fedora installation is the device name which might be different on another computer)
+Performance tuning (not strictly required):
-Performance tuning (not strictly required): We use ext4 filesystems and <code>data=writeback,nobarrier </code> in /etc/fstab. To be able to set these options also on the / filesystem, we use tune2fs on a Linux machine where the stick (dev/sd?) is just plugged in (i.e. not booted from):
+We use ext4 filesystems and <code>data=writeback,nobarrier </code> in /etc/fstab. To be able to set these options also on the / filesystem, we use tune2fs to set both as default mount options on a Linux machine where the stick (dev/sd?) is just plugged in (i.e. not booted from):
   tune2fs -o journal_data_writeback,nobarrier /dev/sd?4
   tune2fs -o journal_data_writeback,nobarrier /dev/sd?5