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April 2017


Tools for maintaining Memory Technology Devices


lsmtd - list memory technology devices


lsmtd [options] [device...]


lsmtd lists information about all available or the specified MTD and UBI devices. The lsmtd command reads the sysfs filesystem to gather information. Alternatively, the procfs filesystem and ioctl interfaces are used, should the sysfs filesytem not be available.
The command prints all MTD and UBI devices in a pretty-printed list format by default.
The default output is subject to change. So whenever possible, you should avoid using default outputs in your scripts. Always explicitly define expected columns by using --output columns-list in environments where a stable output is required.
Use lsmtd --help to get a list of all available columns.


-b, --bytes
Print columns with size quantities (e.g. erase block size) in bytes instead of a human-readable format.
-h, --help
Display a help text and exit.
-i, --ascii
Only use ascii characters for pretty printing.
-J, --json
Use JSON output format. All potentially unsafe characters in string values are escaped with JSON escape sequences or hex-escaped (\u<code>).
-l, --list
Use a pretty-printed list output format (default).
-m, --no-ubi
Do not display information about UBI devices or volumes.
-n, --noheadings
Do not print column headings when using raw or list output format.
-o, --output list
Specify which output columns to print. Use --help to get a list of all supported columns.
The default list of columns may be extended if list is specified in the format +list (e.g. lsmtd -o +EB-SIZE).
-O, --output-all
Output all available columns.
-P, --pairs
Produce output in the form of key="value" pairs. All potentially unsafe characters are hex-escaped (\x<code>).
-r, --raw
Produce output in raw format. All potentially unsafe characters are hex-escaped (\x<code>).
-u, --si-units
Display human readable sizes as powers of ten rather than powers of two.
-V, --version
Print version information and exit.
-x, --sort column
Sort output lines by column.


If the --bytes option is not specified, the JSON output format prints sizes as string values even if they do not have a suffix.


David Oberhollenzer <>


Report mtd-utils bugs to the Linux mtd mailing list.
Linux mtd mailing list: <>
Linux mtd home page: <>


The lsmtd command is part of the mtd-utils package and is available from


Copyright © 2017 David Oberhollenzer - sigma star gmbh
License GPLv2: GNU GPL version 2 <>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


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