lscpu Options: JSON, Parsing, Sysroot, Hexadecimal Masks, Physical IDs, Output All, Bugs, Authors, See Also, Reporting Bugs, Availability

If the list argument is omitted, the default columns are included in the command output. The default output is subject to change. When specifying the list argument, the string of option, equal sign (=), and list must not contain any blanks or other whitespace. Examples: '-e=cpu,node' or '--extended=cpu,node'. The default list of columns may be extended if list is specified in the format +list (e.g., lscpu -e=+MHZ). -J, --json Use JSON output format for the default summary or extended output (see --extended). For backward compatibility, JSON output follows the default summary behavior for non-terminals (e.g., pipes) where subsections are missing. See also --hierarchic. -p, --parse[=list] Optimize the command output for easy parsing. If the list argument is omitted, the command output is compatible with earlier versions of lscpu. In this compatible format, two commas are used to separate CPU cache columns. If no CPU caches are identified the cache column is omitted. If the list argument is used, cache columns are separated with a colon (:). When specifying the list argument, the string of option, equal sign (=), and list must not contain any blanks or other whitespace. Examples: '-p=cpu,node' or '--parse=cpu,node'. The default list of columns may be extended if list is specified in the format +list (e.g., lscpu -p=+MHZ). -s, --sysroot directory Gather CPU data for a Linux instance other than the instance from which the lscpu command is issued. The specified directory is the system root of the Linux instance to be inspected. -x, --hex Use hexadecimal masks for CPU sets (for example "ff"). The default is to print the sets in list format (for example 0,1). Note that before version 2.30 the mask has been printed with 0x prefix. -y, --physical Display physical IDs for all columns with topology elements (core, socket, etc.). Other than logical IDs, which are assigned by lscpu, physical IDs are platform-specific values that are provided by the kernel. Physical IDs are not necessarily unique and they might not be arranged sequentially. If the kernel could not retrieve a physical ID for an element lscpu prints the dash (-) character. The CPU logical numbers are not affected by this option. --output-all Output all available columns. This option must be combined with either --extended, --parse or --caches. BUGS The basic overview of CPU family, model, etc. is always based on the first CPU only. Sometimes in Xen Dom0 the kernel reports wrong data. On virtual hardware the number of cores per socket, etc. can be wrong. AUTHORS Cai Qian <qcai@redhat.com>, Karel Zak <kzak@redhat.com>, Heiko Carstens <heiko.carstens@de.ibm.com> SEE ALSO chcpu(8) REPORTING BUGS For bug reports, use the issue tracker at https://github.com/util-linux/util-linux/issues. AVAILABILITY The lscpu command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>. util-linux 2.39.1 2023‐06‐14 LSCPU(1)

This section continues to describe various options for the `lscpu` command, including JSON output, parsing options with customizable columns, specifying a system root directory for data gathering, using hexadecimal masks for CPU sets, displaying physical IDs for topology elements, and outputting all available columns when combined with --extended, --parse or --caches. It also notes some known bugs, provides information on the authors, related commands, bug reporting, and the availability of the `lscpu` command as part of the util-linux package.