How to resize ext4 root partition without unmount?

How to resize ext4 root partition without unmount?

This article will focus on how to resize EXT4 root partition without unmount. This is an easy way for some system where you are unable to unmount root partition and the system can be recovered easily if something goes wrong like for example AWS instance.

How to mount and unmount filesystem / partition in Linux / Unix?

Follow the below command to mount all the filesytem mentioned in /etc/fstab. Now execute the mount command with -a option to mount all the /etc/fstab entries. To unmount all filesystem mentioned in /etc/fstab use same -a option with umount command like below.

What happens when you unmount a hard drive in Linux?

Even if you unmount drives, they will be remounted (or at least the kernel will try to remount them) at the boot time. In order for the system to stop remounting your drives at boot, you need to remove them from the fstab file.

Do you need to mount a partition to make a mount permanent?

Using the “mount” command does not make your mounts permanent : you need to add them to the fstab file for them to be permanent. If you were to reboot your system without adding your mount settings to the “fstab” file, your drive partition would not be mounted on reboot. The “ fstab ” file is a very important file on your filesystem.

How to expand an ext4 disk in CentOS 6?

Increase/expand an EXT4 filesystem in RHEL 6 / CentOS 6 1 Step 1. Increase a hardware disk size in VMWare ESXi host Checking if you can extend the current disk or need to add a… 2 Step 2. Extend partition within a Virtual Machine More

How to resize the root partition in Linux?

All Linux distributions have this package with the same name as the needed command “parted” File system resize – Use resize2fs from the E2fsprogs package. All Linux distributions include this package mostly with the same name of the package. STEP 1) Expand the partition, which holds the root partition.

How to increase the size of an ext4 filesystem?

# lvextend /dev/vg_miarec/lv_root /dev/sda3 Size of logical volume vg_miarec/lv_root changed from 50.00 GiB (12800 extents) to 81.99 GiB (20990 extents) Logical volume lv_root successfully resized All that remains now, it to resize the file system to the volume group, so we can use the space.

How to mount and unmount filesystems in Linux?

Mounting filesystems isn’t complicated. Usually, it takes only two steps: Usually, the mount command can detect the type of filesystem automatically. That is, we don’t have to pass the -t option explicitly. There are some cases in which the mount command cannot detect the filesystem type:

Is there a KVM for the root partition?

There is no KVM available and there’s only one root partition for the whole server. I have deleted some files that I shouldn’t have and want to recover them with extundelete ( http://extundelete.sourceforge.net/ ).

How to take a snapshot of the root partition?

But only having ssh access, no KVM, no ILO, no backups, etc. is pretty risky. One other option is to install the free Hot Copy snapshotting utility from R1Soft (hcp): See: http://www.r1soft.com/tools/linux-hot-copy/ It would allow you to take a read-only snapshot of your root partition and mount it to a subdirectory.