Chapter 1

Page 6

  1. There are several Linux commands that show you the details of the components in your computer. For example, lscpu will show you the details of your CPU:
     $ lscpu
     Architecture:                    x86_64
     CPU op-mode(s):                  32-bit, 64-bit
     Byte Order:                      Little Endian
     Address sizes:                   36 bits physical, 48 bits virtual
     CPU(s):                          8
     On-line CPU(s) list:             0-7
     Thread(s) per core:              2
     Core(s) per socket:              4
     Socket(s):                       1
     NUMA node(s):                    1
     Vendor ID:                       GenuineIntel
     CPU family:                      6
     Model:                           26
     Model name:                      Intel(R) Core(TM) i7 CPU         920  @ 2.67GHz
     Stepping:                        5
     Frequency boost:                 enabled
     CPU MHz:                         2673.427
     CPU max MHz:                     2667.0000
     CPU min MHz:                     1600.0000
     BogoMIPS:                        5346.59
     Virtualization:                  VT-x
     L1d cache:                       128 KiB
     L1i cache:                       128 KiB
     L2 cache:                        1 MiB
     L3 cache:                        8 MiB
     NUMA node0 CPU(s):               0-7
     Vulnerability Itlb multihit:     KVM: Mitigation: VMX disabled
     Vulnerability L1tf:              Mitigation; PTE Inversion; VMX conditional cache f
                                     lushes, SMT vulnerable
     Vulnerability Mds:               Vulnerable: Clear CPU buffers attempted, no microc
                                     ode; SMT vulnerable
     Vulnerability Meltdown:          Mitigation; PTI
     Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via 
                                     prctl and seccomp
     Vulnerability Spectre v1:        Mitigation; usercopy/swapgs barriers and __user po
                                     inter sanitization
     Vulnerability Spectre v2:        Mitigation; Full generic retpoline, IBPB condition
                                     al, IBRS_FW, STIBP conditional, RSB filling
     Vulnerability Srbds:             Not affected
     Vulnerability Tsx async abort:   Not affected
     Flags:                           fpu vme de pse tsc msr pae mce cx8 apic sep mtrr p
                                     ge mca cmov pat pse36 clflush dts acpi mmx fxsr ss
                                     e sse2 ht tm pbe syscall nx rdtscp lm constant_tsc
                                     arch_perfmon pebs bts rep_good nopl xtopology non
                                     stop_tsc cpuid aperfmperf pni dtes64 monitor ds_cp
                                     l vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 p
                                     opcnt lahf_lm pti ssbd ibrs ibpb stibp tpr_shadow 
                                     vnmi flexpriority ept vpid dtherm ida flush_l1d

    Other useful commands are free to see memory usage and lsusb to see your USB devices. Chapter 3 in Brian Ward’s How Linux Works. 2nd edition, No Starch Press, 2015, is devoted to getting information about the devices installed in your computer.