tune2fs [options] device

System administration command. Tune the parameters of a Linux Second Extended Filesystem by adjusting various parameters. You must specify the device on which the filesystem resides; it must not be mounted read/write when you change its parameters.


-c max-mount-counts

Specify the maximum number of mount counts between two checks on the filesystem.

-e behavior

Specify the kernel’s behavior when encountering errors. behavior must be one of:


Continue as usual.


Remount the offending filesystem in read-only mode.


Cause a kernel panic.


Force completion even if there are errors.

-g group

Allow group (a group ID or name) to use reserved blocks.


Add an ext3 journal to the filesystem. If specified without -J, use the default journal parameters.

-J jrnl-options

Specify ext3 journal parameters as a comma-separated list of option=value pairs. The specified options override the default values. Only one size or device option can be specified for a filesystem. Possible options are:


Attach to the journal block device on ext-jrnl, which must exist and must have the same block size as the filesystem to be journaled. ext-jrnl can be specified by its device name, by the volume label (LABEL=label), or by the Universal Unique Identifier (UUID) stored in the journal’s ext2 superblock (UUID=uuid; see uuidgen). Create the external journal with:

mke2fs -O

The size of the journal in megabytes. The size ...

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