lscpu

Additional Notes

lscpu displays CPU architecture information collected from sysfs and /proc/cpuinfo. It shows architecture, CPU count, threads, cores, sockets, model name, virtualization support, caches, and CPU flags.

It is useful when checking performance, virtualization support, kernel builds, and binary compatibility.

Syntax

lscpu [options]

Parameters

• options: Flags that change how lscpu behaves.

Common Options

• -e: Show extended CPU table.
• -p: Show parseable output.
• -J: Output JSON when supported.
• --online: Show online CPUs.
• --offline: Show offline CPUs.

Examples

lscpu

Show CPU information.

lscpu | grep "Model name"

Show CPU model.

lscpu | grep Virtualization

Check virtualization support.

lscpu -e

Show CPU table.

Practical Notes

• Architecture matters when downloading binaries.
• CPU(s) shows logical CPUs, including threads.
• Check virtualization before using KVM or some emulators.
• Use nproc when you only need the number of processing units.