最准确的查看linux cpu、内存等信息

linux查看cpu信息有很多种方式，有些方式只能在某些特定的发布版上使用，比如说：

[root@jyzf ~]# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                12
On-line CPU(s) list:   0-11
Thread(s) per core:    2
Core(s) per socket:    6
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 63
Model name:            Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz
Stepping:              2
CPU MHz:               1232.812
BogoMIPS:              4799.98
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              15360K
NUMA node0 CPU(s):     0-11

但上面的这种查看cpu的方式太过于局限，只适用于red hat系列，对于debian和其它系列，不太适用。
下面的这种方式查看系统相关信息是比较全面且通用

[root@jyzf ~]# cat /proc/cpuinfo 
[root@jyzf ~]# cat /proc/meminfo 
MemTotal:       16045176 kB
MemFree:          241716 kB
MemAvailable:   10467364 kB
Buffers:          539748 kB
Cached:         13346748 kB
SwapCached:          476 kB
Active:         13010680 kB
Inactive:        2177728 kB
Active(anon):    4275268 kB
Inactive(anon):   999160 kB
Active(file):    8735412 kB
Inactive(file):  1178568 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:      33554428 kB
SwapFree:       33445028 kB
Dirty:                32 kB
Writeback:             0 kB
AnonPages:       1301436 kB
Mapped:          3799984 kB
Shmem:           3972516 kB
Slab:             421040 kB
SReclaimable:     371500 kB
SUnreclaim:        49540 kB
KernelStack:        7488 kB
PageTables:        84888 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    41577016 kB
Committed_AS:    5947368 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      306304 kB
VmallocChunk:   34358945788 kB
HardwareCorrupted:     0 kB
AnonHugePages:    995328 kB
CmaTotal:          16384 kB
CmaFree:               0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:       18268 kB
DirectMap2M:     1955840 kB
DirectMap1G:    16777216 kB
[root@jyzf ~]#