bionic (1) lsmem.1.gz

NAME

       lsmem - list the ranges of available memory with their online status

SYNOPSIS

       lsmem [options]

DESCRIPTION

       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.

OPTIONS

       -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.   The
              default  list  of  columns may be extended if list is specified in the format +list (e.g. lsmem -o
              +NODE).

       -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>).

       -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.

AUTHOR

       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.

SEE ALSO

       chmem(8)

AVAILABILITY

       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/⟩.