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How to change the default mount option of root filesystem in RHEL?

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Operating System and Software

  • Rocky Linux 8
  • CentOS 7

Problem

  • How to change the default mount option of root filesystem in CentOS 7?
  • Why the options set in /etc/fstab make no effect?

How to Fix

  1. Add [rootflags] variable at the end of the line of GRUB_CMDLINE_LINUX in /etc/default/grub as below:
    [example]

    GRUB_CMDLINE_LINUX="rd.lvm.lv=rhel/swap crashkernel=auto rd.lvm.lv=rhel/root rhgb quiet biosdevname=0 rootflags=pquota"
    
  2. Generate a GRUB configuration file.

    # grub2-mkconfig -o /boot/grub2/grub.cfg
    
  3. Reboot the host.

    # reboot
    
  4. Check the option we set be effective.

    # mount | grep root
     /dev/mapper/rhel-root on / type xfs (rw,relatime,attr2,inode64,prjquota)                             //prjquota
    

    Note: prjquota is the same with pquota. Please refer the man page of mount.

    # man mount
    

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