Difference between revisions of "Linux/grub"
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(grub-mkconfig) |
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| Line 5: | Line 5: | ||
* {{l/same|update-grub}} updates the grub menu | * {{l/same|update-grub}} updates the grub menu | ||
** bootable drives do not need to be mounted in order to be included | ** bootable drives do not need to be mounted in order to be included | ||
| + | ==Commmands== | ||
| + | ===rescue mode=== | ||
| + | ''these commands are still available in rescue mode; examples are from a system with one hard drive on /dev/hda, 2nd partition is [[ext4]]'' | ||
| + | * <code>ls (hd{{arg|drive}},{{arg|partition}})</code> | ||
| + | ** Example: <code>ls (hd0,2)</code> | ||
| + | *** Returns: (hd0,2): Filesystem is ext2. | ||
| + | ** Example: <code>ls (hd0,2)/boot/grub</code> | ||
| + | *** Returns: ''(horizontal list of files)'' | ||
==Notes== | ==Notes== | ||
* http://community.linuxmint.com/tutorial/view/245 | * http://community.linuxmint.com/tutorial/view/245 | ||
* http://askubuntu.com/questions/420778/i-need-step-by-step-guidence-to-recover-grub | * http://askubuntu.com/questions/420778/i-need-step-by-step-guidence-to-recover-grub | ||
Revision as of 21:06, 22 March 2019
- grub-install
- note that the target must be a device (e.g. /dev/sdd), not a partition or filesystem (e.g. /dev/sdd1).
- grub-mkconfig creates a new grub.cfg based on what disks and boot options it finds. Run as root and redirect output to the desired file.
- update-grub updates the grub menu
- bootable drives do not need to be mounted in order to be included
Commmands
rescue mode
these commands are still available in rescue mode; examples are from a system with one hard drive on /dev/hda, 2nd partition is ext4
ls (hd<drive>,<partition>)- Example:
ls (hd0,2)- Returns: (hd0,2): Filesystem is ext2.
- Example:
ls (hd0,2)/boot/grub- Returns: (horizontal list of files)
- Example: