lscpu: add page

[sbrl]

This time I'm pulling rabbits out of hats by demonstrating a thing or two you didn't know lscpu. For instance, did you that Linux lets you dynamically enable and disable cpu cores?

---

• The page (if new), does not already exist in the repo.

• The page (if new), has been added to the correct platform folder:
  common/ if it's common to all platforms, linux/ if it's Linux-specific, and so on.

• The page has 8 or fewer examples.

• The PR is appropriately titled:
  <command name>: add page for new pages, or <command name>: <description of changes> for pages being edited

• The page follows the contributing guidelines

[agnivade]

This is what I get.

$lscpu --offline
lscpu: options --all, --online and --offline may only be used with options --extended or --parse.

[sbrl]

Oops! Looks like I made a slight mistake. Correcting now!

[agnivade]

Wow, can't believe we didn't have lscpu ! That's one of my favorite commands.

For instance, did you that Linux lets you dynamically enable and disable cpu cores?

I didn't. But I don't see lscpu enabling or disabling cpu cores. Did you mean to say in general or lscpu can do the job of enabling/disabling ?

[sbrl]

Ah, no. The actual enabling / disabling is done by echoing 0 / 1 to a file. See https://www.cyberciti.biz/faq/debian-rhel-centos-redhat-suse-hotplug-cpu/linux-turn-on-off-cpu-core-commands/

[sbrl]

Merging since there's been activity for ~2 days.