Questions tagged [boot]
Use this tag if you have trouble booting Ubuntu or you have questions about the bootup process.
24,577
questions
646
votes
24
answers
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How do I free up more space in /boot?
My /boot partition is nearly full and I get a warning every time I reboot my system. I already deleted old kernel packages (linux-headers...), actually I did that to install a newer kernel version ...
- 6,735
535
votes
33
answers
2.0m
views
My computer boots to a black screen, what options do I have to fix it?
I am trying to boot Ubuntu on my computer. When I boot Ubuntu, it boots to a black screen. How can I fix this?
Table of Contents:
If you are trying to install Ubuntu
If you have a dual boot system
...
457
votes
8
answers
1.9m
views
How do I change the GRUB boot order?
I have both Windows 7 and Ubuntu installed on a shared machine. Because a lot of the non-developers use Windows, I'd like to change the boot order to make it easier for them.
Currently the boot order ...
- 10.9k
449
votes
10
answers
1.5m
views
How to get to the GRUB menu at boot-time?
My system is not dual-boot, I run a standard Ubuntu desktop system "on the metal" (I think running it in a VM is the same).
Pressing c while booting does not cause the GRUB menu to appear (which I ...
- 24.8k
388
votes
7
answers
981k
views
fsck error on boot: /dev/sda6: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY
I dual boot Ubuntu and Windows 7.
I was browsing on FireFox in Ubuntu and all of a sudden I get some error message, so I rebooted.
Now when I try to boot into Ubuntu I get this message:
fsck from ...
- 3,981
359
votes
7
answers
1.2m
views
Boot drops to a (initramfs) prompts/busybox
I am running an HP pavilion dv6000 dual boot win7 and Ubuntu 12.04. (well, up until today). After a reboot, the boot process drops to the BusyBox shell and I end up at the prompt:
BusyBox v1.18.5 (...
- 3,591
265
votes
10
answers
942k
views
How do I set the grub timeout and the grub default boot entry?
In Ubuntu 12.04 (or above), how do I set the GRUB time and the default OS (that I see at boot time) as I'm dual-booting Windows (7/8) and Ubuntu (12.04 or above)?
- 2,905
261
votes
12
answers
727k
views
Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
Upon trying to upgrade from 10.10 to 11.04 all seemed to go well until the restart. This error message is what comes up:
Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
...
- 2,865
256
votes
16
answers
453k
views
How do I disable X at boot time so that the system boots in text mode?
Is it possible to disable X at boot time? I'm setting up a server so it would be nice if it wouldn't load the graphical interface every time I boot.
- 59.1k
248
votes
13
answers
1.4m
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Uninstall GRUB and use Windows bootloader
I have Windows 8 pre-installed, and then I installed GRUB with Ubuntu. Ubuntu is not my thing, so now I want to remove it along with GRUB. From what I have learned, with UEFI, GRUB does not overwrite ...
- 2,635
215
votes
3
answers
941k
views
System has not been booted with systemd as init system (PID 1). Can't operate
I use WSL2 on Windows 11. I want to run the systemctl command in Ubuntu 20.04, but it gives me the following error:
System has not been booted with systemd as init system (PID 1).
Can't operate. ...
- 2,318
188
votes
16
answers
360k
views
Slow boot - "a start job is running for dev-disk-by..."
I don't recall when the issue started to occur but it's likely when I moved my VMWare Ubuntu image to an external SSD so that I can use the OS on any of my PCs. There aren't many links on Google about ...
- 2,423
174
votes
3
answers
209k
views
How can I tell if my system was booted as EFI/UEFI or BIOS?
How do I determine whether a particular running Ubuntu system was booted using EFI/UEFI, or BIOS?
- 2,159
159
votes
6
answers
308k
views
What do the nomodeset, quiet and splash kernel parameters mean?
What do Kernel command line parameters (also also known as boot options) mean?
When you go to Ubuntu (or better, GRUB) options, you have things like nomodeset, quiet and splash. What do these options ...
- 2,628
157
votes
3
answers
159k
views
How do I re-run boot loader?
Running sudo apt-get -f install said that The link /vmlinuz.old is a damaged link and:
you may need to re-run your boot loader[grub]
Here's the full output:
user@chrubuntu:~$ sudo apt-get -f ...
- 1,581
155
votes
1
answer
434k
views
How do I install Ubuntu on a VirtualBox client from an ISO image?
I have the ISO image file (that is, *.iso) and I am trying to boot my VirtualBox installation with this image. Is it possible? I know how to mount my ISO image to my filesystem (on my host machine), ...
- 1,769
154
votes
4
answers
143k
views
Ubuntu 14.04 LTS live USB boot error (gfxboot.c32:not a valid COM32R image)
I downloaded Ubuntu 14.04 (64 bit) lts. I made a bootable usb stick. But I keep receiving this error message upon booting:
SYSLINUX 4.04 EDD 20110518 Copyright (C) 1994-2011 H. Peter Anvin et al
...
- 1,690
147
votes
20
answers
556k
views
"dev/sda1: clean, ..." This message appears after I startup my laptop, then it won't continue booting
dev/sda1: clean, 552599/6111232 files, 7119295/24414464 blocks
After I turn on my laptop this message appears. The system never boots, the message just stays there.
- 1,579
132
votes
2
answers
559k
views
Root file system requires manual fsck [duplicate]
Whenever I switch on Ubuntu I always see the following message.
(Initramfs): /dev/sda1 contains a file system with errors, check forced.
Inodes that were a part of a corrupted orphan linked lost ...
- 1,421
130
votes
3
answers
549k
views
How to create UEFI-only bootable USB live media?
Having live media that can boot both ways can be a problem when installing Ubuntu onto currently available Windows 8 computers.
In other words the key advantage to creating UEFI-only bootable USB ...
- 28.9k
123
votes
5
answers
173k
views
Mount an external drive at boot time only if it is plugged in
I've got an entry for an external harddrive in my fstab:
UUID="680C0FE30C0FAAE0" /jgdata ntfs noatime,rw
But sometimes this drive isn't plugged in at boot time. This leaves me half way ...
- 2,856
120
votes
5
answers
575k
views
How to get GRUB to be the default bootloader instead of Windows Boot Manager on a UEFI laptop?
I've got an HP Pavilion Touchsmart notebook that came with Windows 8. I've upgraded to 8.1, and now I want to dual-boot an Ubuntu distribution with Windows 10. When dual-booting with Windows 8.1, the ...
- 3,615
114
votes
6
answers
235k
views
How can I show or hide boot messages when Ubuntu starts?
Is there a way to easily turn on/off showing the boot messages (loading the services) when Ubuntu starts? Is it something in Grub2?
I am running 10.04.
- 10.6k
112
votes
14
answers
327k
views
Windows 10 upgrade kills grub and boot-repair doesn't help
I've just upgraded to Windows 10 from Windows 8.1 on my partitioned laptop that has Ubuntu 14.04 installed. Grub no longer appeared on boot so I ran boot-repair from an Ubuntu liveUSB. This didn't ...
- 2,821
112
votes
2
answers
299k
views
How do I disable the boot splash screen, and only show kernel and boot text instead? [duplicate]
I'd like to be able to disable the Ubuntu splash screen that I see on boot with the indicator meter of progress, and replace that with a text-only readout of the boot up process (such as you can get ...
- 75.6k
107
votes
5
answers
544k
views
How do I boot into single-user mode from GRUB?
After changing a few lines in xorg.conf, I can no longer boot Ubuntu (I assume it breaks when trying to load up X), so I need a way to boot into a single-user mode. However, there seems to be zero ...
- 1,273
103
votes
3
answers
134k
views
What is the difference between "systemctl mask" and "systemctl disable"?
I want to improve the boot time of my Ubuntu GNOME 16.04 by disabling plymouth services when booting up. I've found two answers on how to do it on various websites namely:
# systemctl disable ...
- 1,342
101
votes
16
answers
226k
views
How to create a bootable USB with multiple ISO images in it
What I want is to create a bootable pen drive that shows GRUB menu and I can select any of the several bootable systems from there to install/run. I have several ISO images that I want to install in ...
- 213k
100
votes
5
answers
432k
views
How to see log to find a boot problem
I want to find the cause of a boot problem I have tried
ls -ltr /var/log from antony@antony which gives me login incorrect
can someone tell me what command to use to see what has upset the boot ...
- 1,393
97
votes
16
answers
432k
views
"Welcome to emergency mode!" Think it is a fsck problem
My computer booted to a black screen with this error message.
Welcome to emergency mode! After logging in,type "journalctl -xb" to view
system logs, "systemctl reboot" to reboot, "systemctl ...
- 1,175
96
votes
3
answers
109k
views
Diskfilter writes are not supported > What triggers this error?
This message occurs when leaving the Grub menu and before the Ubuntu splash screen.
How do I fix the problem to clear the message?
And what doe is it mean?
error: Diskfilter writes are not ...
- 2,117
95
votes
3
answers
1.1m
views
How to start GUI from command line?
I've installed Ubuntu 12.04 32-bit on my machine. But when I switch on the computer, I get command line:
Ubuntu 12.04 LTS COMP-1245 tty1
And it prompts for username and password. Once I provide my ...
- 1,075
94
votes
9
answers
122k
views
How to stop mysql from running at boot time?
Currently, my MySQL server starts on every server boot. For a couple reasons, this is undesirable behavior. Is there a way to disable this behavior?
- 2,041
94
votes
11
answers
143k
views
Can't install Ubuntu 18.10 on XPS 15 - EFI\BOOT\mmx64.efi not found
I tried to install Ubuntu 18.10 on my XPS 15 9570 earlier. Everything was working fine until I got to the partition selection part of the installation. That's when the installer crashed and I had to ...
- 963
93
votes
13
answers
443k
views
How can I reinstall GRUB to the EFI partition?
I want to reinstall GRUB 2 and I found these instructions:
How to Repair, Restore, or Reinstall Grub 2 with a Ubuntu Live CD or USB.
In my case, the boot loader is installed in the EFI partition. If I ...
- 1,299
92
votes
1
answer
69k
views
Can I boot a Live USB fully to RAM, allowing me to remove the disk?
I have a live USB made with the standard Ubuntu disk image creator for 16.04 LTS. In the current state, I can boot to this disk, but it still requires the original USB to run properly at all times.
...
- 34.2k
91
votes
1
answer
253k
views
How do I boot into a root shell?
When booting to the graphical desktop fails we sometimes are recommended to boot into a "root shell" or to boot in "recovery mode".
How do I do that?
- 143k
90
votes
7
answers
241k
views
How do I run update-grub from a LiveCD?
Okay, so I did something stupid. I was trying to clean up my Grub entries, and accidentally removed all of my Linux kernels from Grub (they're still on the hard drive). So now, obviously, Grub doesn'...
- 33.2k
88
votes
8
answers
278k
views
How to run a script during boot as root
I had a script that automatically enables my wifi without using networkmanager, but I don't know how to run the script as root while the system is booting. How do I make the script run automatically ...
- 2,392
86
votes
4
answers
352k
views
Where are the systemd units/services located in Ubuntu?
I keep finding, while googling, that they're located at /usr/lib/systemd/system/ and /etc/systemd/system/. However, in my ubuntu, the first doesn't even exist, and the other has only a few services
...
- 913
82
votes
5
answers
258k
views
Windows 10 upgrade led to grub rescue
I was dual-booting Windows 7 and Linux Ubuntu on my desktop, and today is the day they gave out free Windows 10 upgrades. How exciting! I got the update, and it was installing, and I left to go take ...
- 921
80
votes
11
answers
134k
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How do I improve boot speed?
I have seen many videos that make Ubuntu faster, but these methods only make desktop performance faster.
I am looking to make my computer boot faster. Is their anything I can do to make Ubuntu boot ...
- 2,794
79
votes
4
answers
916k
views
GRUB rescue problem after deleting Ubuntu partition! [duplicate]
After I deleted my Ubuntu partition, I rebooted my computer and I only get a prompt:
grub rescue >
The command ls lists
(hd0) (hd0,msdos5) (hd0,msdos3) (hd0,msdos2) (hd0,msdos1) (hd1) (hd1,...
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79
votes
6
answers
90k
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How folders created in /var/run on each reboot
In recent ubuntus (specifically, what interests me the most is 12.04) /var/run is tmpfs, and thus I assume it starts empty with each reboot.
Yet, I see there some folders, like /var/run/mysqld and ...
- 1,197
74
votes
22
answers
305k
views
How do I hide the GRUB menu showing up at the beginning of boot?
I stopped dual booting and I don't want to have to choose the OS any more. I want to boot into Ubuntu 12.04 directly without seeing the GRUB menu.
How can I achieve that?
- 1,544
74
votes
21
answers
177k
views
SMBus/ BIOS error while booting Ubuntu in VirtualBox
I am trying to boot Ubuntu 13.04 in VirtualBox, but every time I boot, I get an error that says:
SMBus base address uninitialized - upgrade BIOS or use force_addr=0xaddr
This happens right after I ...
- 741
74
votes
4
answers
499k
views
How to start Ubuntu in Console mode
I want to know if there is a way to switch to console mode from the boot menu. I have an NVIDIA 1070 and every time there is an update, the GUI stops working. All I need to do is re-install the ...
- 3,433
70
votes
6
answers
419k
views
Grub rescue - error: unknown filesystem
I have a multiboot system set up. The system has three drives. Multiboot is configured with Windows XP, Windows 7, and Ubuntu - all on the first drive. I had a lot of unpartitioned space left on the ...
- 2,171
68
votes
2
answers
48k
views
Missing parameter in configuration file. Keyword: path
Im trying to boot ubuntu 14.10-server-i386 in a pendrive.
But im getting this error when boot from pendrive.
Missing parameter in configuration file. Keyword: path
What does it mean? How to ...
66
votes
9
answers
585k
views
error: file '/grub/i386-pc/normal.mod' not found
error: file '/grub/i386-pc/normal.mod' not found.
grub rescue>
What can I do? I just sit and stare at it.
I found my old netbook (Dell Inspiron 1010) which I have not used for about four years. ...
- 761