LSMEM(1) User Commands LSMEM(1)
lsmem - list the ranges of available memory with their online status
The lsmem command lists the ranges of available memory with their online status. The listed memory blocks correspond to the memory block representation in sysfs. The command also shows the memory block size and the amount of memory in online and offline state. The default output compatible with original implementaion from s390-tools, but it's strongly recommended to avoid using default outputs in your scripts. Always explicitly define expected columns by using the --output option together with a columns list in environments where a stable output is required. Not all columns are supported on all systems. If an unsupported column is specified, lsmem prints the column but does not provide any data for it. Use the --help option to see the columns description.
-a, --all List each individual memory block, instead of combining memory blocks with similar attributes. -b, --bytes Print the SIZE column in bytes rather than in a human-readable format. -h, --help Display help text and exit. -J, --json Use JSON output format. -n, --noheadings Do not print a header line. -o, --output list Specify which output columns to print. Use --help to get a list of all supported columns. -P, --pairs Produce output in the form of key="value" pairs. All potentially unsafe characters are hex-escaped (\x<code>). The default list of columns may be extended if list is specified in the format +list (e.g. lsmem -o +NODE). -r, --raw Produce output in raw format. All potentially unsafe characters are hex-escaped (\x<code>). -s, --sysroot directory Gather memory data for a Linux instance other than the instance from which the lsmem command is issued. The specified directory is the system root of the Linux instance to be inspected. -V, --version Display version information and exit. --summary[=when] This option controls summary lines output. The optional argument when can be never, always or only. If the when argument is omitted, it defaults to "only". The summary output is suppresed for --raw, --pairs and --json.
lsmem was originally written by Gerald Schaefer for s390-tools in Perl. The C version for util-linux was written by Clemens von Mann, Heiko Carstens and Karel Zak.
The lsmem command is part of the util-linux package and is available from Linux Kernel Archive ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩.
This page is part of the util-linux (a random collection of Linux utilities) project. Information about the project can be found at ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a bug report for this manual page, send it to email@example.com. This page was obtained from the project's upstream Git repository ⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on 2017-04-25. If you discover any rendering problems in this HTML ver‐ sion of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original man‐ ual page), send a mail to firstname.lastname@example.org util-linux October 2016 LSMEM(1)
Pages that refer to this page: chmem(8)