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6 votes

I deleted all the contents of /boot and now server is not booting

The /boot partition holds important Linux kernel files as well as Grub files. Without them, your system will not boot (as you already figured out). And just restoring the Grub files is not going to ...
Oldskool's user avatar
  • 2,025
3 votes
Accepted

Dual boot - Windows shows picker instead of starting

Start a cmd window with administrator rights, and run the below command: C:\Windows\system32> bcdedit /enum Windows Boot Manager -------------------- identifier {bootmgr} device ...
lenin's user avatar
  • 71
3 votes

How big is grub2?

You cannot copy GRUB2 that way. The first part of the GRUB code is located in the boot sector which may also contain metadata about your disk (either partition table or file system metadata). Since ...
kasperd's user avatar
  • 30.8k
2 votes

What is the difference in restricting single user mode with password through /etc/sysconfig/init and /etc/inittab in a Linux system?

First thing to note is /etc/sysconfig/init is strictly a Redhat Linux (and derivatives) convention. You won't find that file on a Debian or Slackware system for instance. Second note, recently, many ...
Server Fault's user avatar
  • 3,814
2 votes

WDS Server - How does DHCP scope option 67 work?

PXE and options 66,67 is not a Microsoft only technology, those same options can be used to boot a Linux machine. That 67 option tells the client a path to a file from a tftp server (option 66) that ...
Zoredache's user avatar
  • 132k
2 votes

DELL r630 + NvMe M.2->PCie : Cannot boot Ubuntu installed on M.2 NvMe drive via. PCie adapter

I ran into this exact issue, also with an R630, also booting from an M.2 drive, also installing Ubuntu. Nice. Arni J's answer is exactly what I ended up doing since my R630 came with two spare HDDs, ...
William Miceli's user avatar
1 vote

Failed to Migrate Windows Boot Manager

Start from the installation media again and under advanced options start a command prompt and try to repair the boot manager with these commands bootrec /fixmbr bootrec /fixboot bootrec /scanos ...
Turdie's user avatar
  • 2,697
1 vote
Accepted

Boot manager shows two entries but only one partition remains after restore

You can use bcdedit /delete to remove entries from the list. bcdedit /delete /? This command deletes an entry from the boot configuration data store. bcdedit [/store ] /delete [/f] [/cleanup | /...
Greg Askew's user avatar
  • 37.3k
1 vote

QNAP TS-228 u-boot firmware

[~] # dd if=/dev/mmcblk0boot0 of=/share/Stuff/uboot.img 8192+0 records in 8192+0 records out [~] # Here is the dump: https://easyupload.io/txq4cw
Northy's user avatar
  • 11
1 vote
Accepted

DELL r630 + NvMe M.2->PCie : Cannot boot Ubuntu installed on M.2 NvMe drive via. PCie adapter

After much trial and error the answer is simply: A Poweredge r630 server will not boot from any consumer-grade SSD you stick in it, whether it's M.2, PCIE or Sata - so don't waste your time doing it. ...
Arni J's user avatar
  • 75
1 vote

I deleted all the contents of /boot and now server is not booting

I had a similar problem recently. I could recover by following the answer here. I documented the steps that I followed in a new answer. I copying my answer here for convenience: I have a Fedora ...
hnagaty's user avatar
  • 131
1 vote

PXE boot from an other Network

PXE needs two things: DHCP and TFTP. As TFTP is just routable UDP packets, this will work if you have IP-forwarding set up on your router and got your firewall rules right. What you're missing is ...
Andreas Rogge's user avatar
1 vote
Accepted

Bootloader password - existing content found in /etc/grub.d/01_users

Install grub2-tools, you will find /usr/sbin/grub2-setpassword in there. That is what the current contents are made for. Running the grub2-setpassword binary will generate /boot/grub2/user.cfg ...
Karel's user avatar
  • 649
1 vote
Accepted

Setting bootloader password in EL7

You need to create /etc/grub.d/01_users file and place the info in there. This typically is created when GRUB boot loader password is used in a kickstart template but must be made manually otherwise. ...
wilbo's user avatar
  • 84
1 vote
Accepted

How do I extract the initrd when the usual cpio -i -m produces gibberish?

I think your kernel is using an actual (and obsolete) initrd: init RAM DISK. Not a modern initramfs that kept the old name only. So it's not a cpio archive but a complete disk image of a filesystem. ...
A.B's user avatar
  • 13.1k
1 vote

WDS Server - How does DHCP scope option 67 work?

Option 66 holds the TFTP address, while option 67 holds the path and name of a NBP (Network Boot Program) to be retrieved from the TFTP server, loaded in memory and run. The clients inform its pre-os ...
Pat's user avatar
  • 3,599

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