lscpu gives no output in WSL

I'm in Ubuntu on Windows. I'm in Ubuntu 16.04.2 LTS. I'm confused that lscpu doesn't give any output.

But man lscpu and lscpu -h will give me right information.

What's the problem and how can I fix it?

2 Answers

When using Windows Subsystem for Linux make sure you are on latest Windows version available.

(Win+R -> type winver)

I'm on version 1703 build 15063.483 (Creators Update) and lscpu works just fine.

onoma:~$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 2
On-line CPU(s) list: 0,1
Thread(s) per core: 1
Core(s) per socket: 2
Socket(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 15
Model name: Intel(R) Pentium(R) Dual CPU E2200 @ 2.20GHz
Stepping: 13
CPU MHz: 2200.000
CPU max MHz: 2200.0000
BogoMIPS: 4400.00
Hypervisor vendor: vertical
Virtualization type: full
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm

You not only have to be at the latest version of Windows, you also have to have the latest updates for Ubuntu in WSL.

I was on Win 10 version 1709, OS build 16299.64 with WSL reporting Ubuntu 16.04.2, when when I ran the lscpu command and it provided no output. It also gave a return code of 1.

[ joelk: ~ ]$ lscpu
[ joelk: ~ ]$ echo rc=$?
rc=1
[ joelk: ~ ]$ uname -rv
4.4.0-43-Microsoft #1-Microsoft Wed Dec 31 14:42:53 PST 2014
[ joelk: ~ ]$

After I performed a

$ sudo apt-get update 

and a

$ sudo apt-get upgrade

Ubuntu reported 16.04.3 and the lscpu command provided expected output.

[ joelk: ~ ]$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 2
Core(s) per socket: 2
Socket(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 142
Model name: Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
Stepping: 9
CPU MHz: 2904.000
CPU max MHz: 2904.0000
BogoMIPS: 5808.00
Virtualization: VT-x
Hypervisor vendor: vertical
Virtualization type: full
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave osxsave avx f16c rdrand
[ joelk: ~ ]$ echo $?
0
[ joelk: ~ ]$