Ubuntu Installation :: Place 'root' On Manually Created LVM?
Mar 10, 2010
I'm just trying to install Ubuntu server 9.10 to a logical volume manager partition. I have two physical disks of 250GB - each has a 10GB primary partition and 240GB logical partition for LVM
I created partions using 'manual partitioning'.
It shows:
LVM VG grpA 240GB
LVM VG grpB 240GB
SCSI1 (sda) 250GB
#5 logical 240GB K lvm
[Code].....
I want '/' (i.e root) to be on a logical volume in the lvm 'grpA' (on disk sda).
But the installer does not offer creation of Logical Volumes or their format - only seems to go as low as volume group. If I try continuing installer complains that 'no root file system is defined'.
Does anyone know how I create the LV and install with root there?
(On another machine with 9.04 I used the guided partitioning with use entire disk and lvm - that just worked putting root in the lvm... but this current machine needs a specific layout).
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May 19, 2010
If you manually partition Ubuntu Linux; how much do you allot to your root directory? If someone installs many games and software, should they use a very large root directory such as 30GB or more?
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Jan 17, 2011
Relatively inexperienced user using Linux/ubuntu. Not too savvy I admit and like to use GUI as much as possible. Not a great fan of the Terminal window... I have installed a couple weeks ago Ubuntu 10.10 (Desktop Edition) using Alternative install disk (don't ask why!) on 4Gb usb stick. Working fine except one thing with the raid array. I have created a raid5 array made of 6 drives using GUI (Disk Utility). After an expansion of the array (or was it a reinstall of the OS, I can't remember exactly?) the array does not autostart anymore. Of course nor does it automount anymore.
THE WEIRD THING is that I can still start it MANUALLY from the "Disk Utility" GUI after two tries. And it works just fine thereafter!!! The first time i try to start it gives an error (something about /dev/md0_127 being not ready or buisy). THE SECOND TRY ALWAYS WORKS like a charm, the array starts and i can mount it just fine. Here is a screenshot: I have also noticed that there is no entry in fstab for /dev/md0 although I can manually mount it using the same Disk Utility GUI. That is strange to me. Is it normal? i could easily add it manually but Ubuntu it won't boot anymore (i tried and failed, hence the reinstall). I tried for two weeks to find a solution browsing on different forums but the problem is beyond my expertise...
BELOW are further details about my configuration mdadm.conf, fstab, fdisk -l result and other info. I don=t want to loose my data but it would be nice to make this thing work and be able to access my fileserver via vnc instead of having to keep it connected to a lcd monitor as now. This is the blkid result:
[Code]...
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Feb 21, 2015
I'm trying to manually boot (from the GRUB console) into a system set up as follows: crypt partition -> LVM -> root LV, and I'm having some trouble figuring out how to do this from the GRUB console.
I have successfully manually booted a system which is set up as just LVM -> VG -> root LV. All I have to do is load the LVM module. In GRUB, that partition shows up as (hd0,gpt5). Once I load the GRUB LVM module, I can see the logical volume within the LVM as well. (My volume group name is "caesar", and the single logical volume is named "root".)
Code: Select allgrub> ls
... (hd0,gpt5) ...
grub> insmod lvm
grub> ls
... (lvm/caesar-root) ...
It's fairly simple to manually boot:
Code: Select allgrub> set root=(lvm/caesar-root)
grub> linux /vmlinuz root=/dev/mapper/caesar-root
grub> initrd /initrd.img
grub> boot
Where I am having difficulty is in trying to insert crypt before LVM. I can set up such a scheme, and put a minimal installation on it, without issues. It's booting into it upon reboot that I can't figure out. Once I load the GRUB crypto, cryptodisk and luks modules, I can mount the crypto partition:
Code: Select allgrub> ls
... (hd0,gpt5) ...
grub> insmod crypto
grub> insmod cryptodisk
grub> insmod luks
grub> cryptomount (hd0,gpt5)
Attempting to decrypt master key...
Enter passphrase for hd0,gpt5 (<long hex string here>): <type my password>
Slot 0 opened
grub> ls
... (crypto0) ...
At this point, GRUB sees the crypto partition as (crypto0). But the GRUB LVM module doesn't see "inside" of the crypto partition, so I don't see the root logical volume within the LVM listed; all I see is (crypto0).
Code: Select allgrub> insmod lvm
grub> ls
... (crypt0) ...
Setting it as root doesn't work:
Code: Select allgrub> set root=(crypto0)
grub> ls /
error: disk `crypto0' not found.
So, How do I get GRUB to "see" LVM inside the crypto partition?
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Mar 25, 2010
The system crontab (/etc/crontab) uses the same format, except that the username for the command is specified after the time and date fields and before the command.
[code]...
Every hour, I get an e-mail complaining about the first line of the crontab:
[code]...
I get the same complaint from the other entries: It looks to me as if cron, or anacron, is trying to execute the user (root) as a command. Predictably, the shell doesn't like it, so barfs and triggers an e-mail about it. Why is this not doing what the man page says it should do? The 2nd problem I believe is related to exim, not cron. The e-mails I'm getting above are being bounced from my ISP because they are directed to root@myisp.com, rather than my regular e-mail address. When the message bounces, it bounces to my regular e-mail address. In /etc/aliases, I have root: [URL]... and in etc/email-addresses I have root: [URL]... Adding the entry to /etc/email-addresses allowed the bounce to find me because the sender's address is [URL]... but how can I get cron to send these messages to me in the first place, instead of root?
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Aug 16, 2010
I have setup the Red Hat system and installed MySQL through the Add / Remove Program. I have RHEL 5.4.
When MySQL is being started manually it is being started as root. However, when MySQL is being started using the services command it is started as the user MySQL and it doesn't work.
How can I start MySQL service as root? Or is there another way to fix that issue.
Let me know if you need more information (giving details on how to get it would be nice too).
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Mar 9, 2011
Debugging some of my scripts after upgrading from Debian Lenny to Ubuntu 10.04. In so doing, I tripped over this "problem," the solution to which may give me a clue to others.
On a bash shell command line I created a file thusly:
sudo touch zero_file
and it lists as expected with default permissions 0644:
-rw-r--r-- 1 root root 0 2011-03-09 11:18 zero_file
But then this command fails
sudo echo abcdef >>zero_file
-bash: zero_file: Permission denied
I can place the command (minus the "sudo") in a script & run it under the auspices of sudo & it works. Am I missing something re the stdin redirection when using sudo?
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Dec 29, 2010
I scan a document with root pressing the scanner button. I would like to send an email using my gmail account. OK. nothing difficult with that... mbsmtp + mutt for sending trhough the sh script.
1-root is to be avoided at max to do some internet duties, due to security. Apt-get is good, but ok surfing or email sending shall be avoided for higher security.
2- sudo or su running mutt through this way, ok, using an existing user. OK, possible and simple, but not comfortable since you have to use an account of an user existing (create a new user for scanner and email?? - no, come on, we have linux and can maybe find a solution)
how to send an Email from root console using an non created USER?
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Feb 19, 2010
I have set up a cron job in linux server using the command 'wget -q -o wget_outputlog url'
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How to stop this.
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May 15, 2011
I have the following setup
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b) 2nd sata hdd - Win7 (64 bit)
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I do not recall which setup I have now but I can confirm that when I start the computer, I get a GRUB menu that lets me choose Ubuntu or Windows. Ubuntu is the default if no choice is made within 20 seconds. I like that setup and want to replicate it with GRUB 2, if possible. If that is what I want, then I should place GRUB 2 on the MBR, correct or not? Note, I do not intend to install any other OSes. In other words, my 1st sata hdd will only have ubuntu and my 2nd sata hdd will only have windows.
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Jul 20, 2011
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Feb 15, 2010
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Everytime I try to boot it after a restart, it goes through the setup process until it reaches the following blue-screen error message:
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I am DEF keeping Ubuntu as my primary. I just want to have XP (Not Vista) for things that Ubuntu can't do (or can't do as effectively with my level of user ability -- yet ).
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Mar 11, 2011
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Code:
fdisk -l
later today (cause i am not in my pc)
[code]....
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Aug 31, 2010
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May 20, 2011
I'm looking to partition HD to place Ubuntu 11, and not destroy Windows Vista, here's what I see, Allocate drive space,
/dev/sda
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/dev/sda2 ntfs 9428 MB 8346 MB
below that,
Device for boot loader installation
/dev/sda ATA ST3320820AS (320.1GB)
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Jun 3, 2011
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Is there any log file created during the installation? (10.04 desktop edition) If there is, where is it stored?
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Jul 8, 2010
After an upgrade from 8.04 -> 10.04 my system is unable to boot. After a lot of work it seems that the blocking problem is that /dev/md0 is not being created in initramfs so the volume group containing the / file system is not being activated and therefore the boot fails at that point. In /sbin both mdadm and lmv exist and the arrays and volume groups can be created manually using them. The system can then complete booting. Updating initramfs after booting has no apparent effect.
Based on posts I have found I have tried adding raid=noautodetect and rootdelay=240 to the GRUB kernel command line separately and together with no effect, except delaying the boot. It seems that udev is not running correctly so I began digging through the udev rules but don't really understand how it actually works.In /lib/udev/rules I found;
85_mdadm.rules
85_lmv2.rules
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Mar 4, 2010
I just finished installing Karmic Koala on my computer a little while ago... and I chose to partition the drive manually. My computer has 2 hard drives:
Here's the HDD which boots first and has Grub and Ubuntu on it:
[URL]
And my second HDD which has Windows and a backup partition called "datas":
[URL]
And here's a copy of my /etc/fstab file:
Code:
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
[code]....
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