How to rename root volume group or logical volume in red hat enterprise linux. Increase a vmware disk size vmdk formatted as linux lvm 2. Changing the name of a volume group databook for linux. Fixing the fstab file so filesystems and swap can mount at boot time. Lvm renaming a volume group and ensuring system can boot. How to rename logical volume and volume group in linux. Howto change the lvm volume group name that includes the. Apr 20, 2016 renaming a volume group is a fairly straightforward process, assuming that the volume group is not the root volume group. How to rename root volume group or logical volume in red hat. How to change the name of logical volume in volume group. Edit the file etchostname with your favorite text editor.
Renaming a volume group use the vgrename command to rename an existing volume group. Remounting the file system is necessary in order for the user space to see the name change. Now you need to edit etcfstab to replace the old name with the new one everywhere in that file. Now that we have decided on a name, lets use a single command to add both physical volumes to the new volume group. Unmount all the volumes from volume group which needs to be migrated. Small post to explain how to rename a lvm volume group on debian. Howto change the lvm volume group name that includes the root partition the original documentation contains details and explanation of each of the steps listed below. Logical volume manager lvm subscriber exclusive content a red hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions. The command vgcreate home2 devsda3 will create a volume group called home2 that comprises devsda3. How to create filesystem on a linux partition or logical. The reason i wrote this blog is because i am an exaix administrator, so i believe that all root volume groups should be named rootvg.
It should be enough if the boot command line linux. For renaming home directory to correspond to the renamed user, we use d option with usermod command. The vgimport will create the device special files with the new names. Nov 25, 2016 understand what happens in the background when you change the volume group name of existing vg. Jun 19, 2018 you can change the ownership of a specific file using the chown command. However, the two volume groups should have different uuids unless the disk was cloned so you can rename one of the conflicting volume groups with vgrename. Open a commandline terminal select applications accessories terminal, and then type the following command to list your group ownership i.
I refused to believe that changing the vg name remotely wasnt possible. I had attempted to change the volume group name following. How to create a volume group in linux with lvm enable. Modify the kernel boot options to use the new name rd. Once mounted, space belonging to that logical volume is available for use to end user.
Here we will see step by step guide for this migration. As you seem not interested in useful volume group and volume names currently your vg is named volgroup00 and your lv logvol01, ill leave these untouched. Ive learned the hard way that when a software vendor tells you to use. To create a lvm logical volume select the created lvm volume group and create logical volume.
Renaming logical volumes red hat enterprise linux 6 red hat customer portal. You must change all occurrences of the volume group name in the etcfstab file in order to ensure that all logical volumes mount properly. The logical volume group and the first disk partition will now have identical names. If physical volume is in use then you will not be able to remove the volume from volume group. How to change a user and group id on linux for all. Add physical volumes to a volume group using vgextend. The command below creates a lv with a size of 50gb. Renaming a volume group red hat enterprise linux 6. If you are creating a volume group at install time, the name system is suggested for a volume group that will contain the suse linux enterprise server system files.
In addition, you must change the bootgrunnf file, or bootgrub2g for more recent distribution releases such as fedora. The resize2fs program will resize ext2, ext3, or ext4 file systems. Renaming a volume group red hat enterprise linux 6 red. How do i display group information for the specified username under linux. Using lvm you can create, grow and shrink partitions as per your needs. After renaming you must edit both etcfstab and bootgrubg to update the use of the name for any reference to your root and probably also. If a disk is connected and it contains a volume group with the same name as the volume group containing your root filesystem the machine might not even boot correctly. If any volume group contains two or more physical volumes and you want to remove the attachment of any particular physical volume from volume group then run vgreduce command with volume group name and physical volume name. Lets go ahead and create physical volume using the raid 5 partition i. Now we are all set to configure linux lvm logical volume manager on software raid 5 partition. To change hostname from nixcraft to vivekslaptop, enter. The output of the df command will not display the new name of the file system until it has been remounted. How to rename logical volume in linux and hpux kernel talks.
Jan 06, 2016 disks software utility preinstalled on linux systems for managing partitions through gui. There is an option to encrypt your volume, if you want it encrypted select create encrypted volume and enter a password also confirm it. Figure e shows the command string to use for volume group. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. I dont want to know that the system considers the mount to be 183.
Lvm logical volume manager is a software that allows you to manage multiple hard disk space by creating logical volumes. Rename root volume group house of brick technologies. Here are some pointers on how to change the volume group name on an ubuntu lvm machine. It does not include the requirement for f switch described in the reboot step below. Fixing grub so it knows where the root filesystem is located. Enter a name for the volume group default is vg0, select the device lvm physical volume and the size, and choose create. Then it raises the volume by 5%, or, if provided a parameter, by the specified amount. In this example the existing volume group is named myvg01. How to rename root volume group or logical volume in red. To rename a logical volume you will have to unmount your partition. Sep 28, 2012 now, you can change the label using the following command. First, you need to know the volume group name may have a dash in it. It also doesnt uses the current standard dracut but instead mkinitrd. How to exportmove the volume group to other linux node.
Most modern linux distributions are lvmaware to the point of being able to have their root file systems on a logical volume heinz mauelshagen wrote the original lvm code in 1998, when he was working at sistina software, taking its primary design guidelines from the. Renaming logical volumes red hat enterprise linux 6. The existing name for my volume group is volgroup as you see in blue color. For example, the logical volume name for opt is opt, for home is home, etc. Unregister a volume group from the system vgextend. The volume group name is myvg01 and the logical volume name is stuff. How to change lvm physical volume name server fault. At least one physical volume is required to create a volume group. The post describes the renaming of the volume group vg being used for the root file system. An alternate syntax to rename this logical volume is. Logical volume is portion of volume group which can be mounted on a mount point. How to manage and use lvm logical volume management in ubuntu. Select select indicates that a required positional parameter can be omitted if the select option is used.
In this article i will share the steps to create filesystem on a linux partition or a logical volume and mount it persistently or nonpersistently in your linux system on a unix system, everything is a file. If you need to change the names of the logical volume, edit the map file and change the logical volume name s as required. The problem with that approach is that you had to have physical access to the computer and needed to boot into rescue mode. He has been working with linux and open source software for over. Insert the size of the volume, your preferred filesytem format, and select srv as mount point. If usb device is linux formatted drive ext3 filesystem for ext2ext3ext4 filesystems, we need to use e2label command. Working with physical volumes, logical volumes, and volume. Complete lvm volume group can be moved from one system to another system using vg commands. There are four main things that need to happen when renaming a root volume group, in order to make the change successful. It can be gedit, xeditor, vi, nano any graphical or console app you like. Rename lvm volume group holding root file system volume.
You can also use multiple physical volumes to make up a volume group. For security purposes only, the root user or members of the sudo group may transfer ownership of a file. Ubuntu linux change hostname computer name nixcraft. Edit etcfstab and change all the entries with the new name.
Once you have select the partition unmount it,click the cog icon, then select edit file partition. So the only need is to change the mount point, so you edit etcfstab and change the respective line. Sep 07, 2019 verify that the group owner of the file has changed using the ls command. If you then wish to rename the disk partition, you can do so easily by simply selecting the disk in finder, hitting ctrli and updating its name in the popup dialog. Most modern linux distributions are lvmaware to the point of being able to have their root file systems on a logical volume. See volume group information in detail using vgdisplay.
How to rename computer in linux mint and change pc host name. You need to provide a unique name to your volume group. But first, we will see how it can be done without vgrename command so that step by step you will understand what actually happens in the background while vg name changes. How to increase the size of logical volume lvm on linux. You have to supply the old vg name and required a new name. In this post we are going to see step by step how to rename logical volume. I had attempted to change the volume group name following gwiesenekkers post called rename root volume group. To add the new hard drive to a volume group you just need to know what your new partition is, devsdc1 in our case, and the name of the volume group you want to add it to. This will add the new physical volume to the existing volume group. Give it a name default is lv0, lets call it lvsrv since this will be used to mount srv. First create the logical volume lv from existing free space within the volume group. Changing the volume name on an lvm machine edwardslab. H ow do i find out the group name under linux operating systems using bash shell prompt.
Linux utilitiescommands for changing or modifying partition nameslabels commands for changing or modifying partition name label are dependent on type of filesystem on that partition with exception of some general commands. I had accidently left the logical volume name as the default, but wanted to label it with an identifier. I would like to do this without permanently removing the data in the original copy of origvg. There are eight8 functional steps to resize the logical volume in linux. Extend the size of a logical volume using lvextend 8. Now, you can change the label using the following command.
I have two volumes groups, origvg and newvg, that are basically a mirror of each other. The red hat customer portal delivers the knowledge, expertise, and guidance available through your red hat subscription. To rename computer in linux mint and change pc host name, do the following. I know that, like me, many sysadmins have resisted the change to logical volume management. I have recently written a short bash program to copy some mp3 files from a usb. Jan 22, 2020 to change hostname from nixcraft to vivekslaptop, enter. When using the gnome file browser and i go into a directory that is a mount, the file browser shows the volume name of that mount. For example, vgcreate home3 devsda3 devsda5 will create a volume group comprising the sda3 and the sda5 physical. If it does, than any use of the devmapper reference will need to have two dashes.
A volume group can be renamed with easy vgrename command linux. In this guide, learn how lvm can make managing storage easier. The physical extent size defines the size of a physical block in the volume group. Hi, i need to change the group name which is listed under a file.
How to change linux partition label names on ext4 ext3. At the end it tells you the volume you are now hearing. Use the vgrename command to rename an existing volume group. The command to use is vgcreate volume group name name. So the only need is to change the mount point, so you edit etcfstab and change the respective line from pracle to oracle. This entry is 1 of 17 in the linux unix set hostname tutorial series. In linux, logical volume manager lvm is a device mapper target that provides logical volume management for the linux kernel. That is to say, the volume group containing the boot image and root filesystem. It cannot be stressed enough how important it is to make a backup of your system before you do this.
I could not change the name in the graphical utility for usr because files were in use and there was no way to dismount the volume and still have access to the. See lvm8 for information about tag names and using tags in place of a vg, lv or pv. A linux users guide to logical volume management opensource. Lvm looks at all potential physical volumes, checks if they have an lvm signature, and if they do reads them to find out what volume group they belong to and what they contain. How to rename volume group kernel talks unix, linux. The file has a list of users that need to be changed under the home i tried with the below, i am sure that its wrong.
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