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This article mainly explains "how to view the system configuration in Linux". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to view system configuration in Linux".

CPU\ 1. Lscpu: displays cpu schema information

[xxx@localhost ~] $lscpu Architecture: x86 processors 64 CPU op-mode (s): 32-bit, 64-bit Byte Order: Little Endian CPU (s): 4 # Total number of processor cores On-line CPU (s) list: 0-3 Thread (s) per core: 1 # number of threads supported per core. 1 indicates that only one thread is supported That is, hyperthreading Core (s) per socket: 1 # number of cores per processor Socket (s): 4 # processors NUMA node (s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 63 Stepping: 0 CPU MHz: 2599.998 BogoMIPS: 5199.99 Hypervisor vendor: VMware # hypervisor supplier Virtualization type: full L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 30720K NUMA node0 CPU (s): 0-3 Total processor cores = number of processors each Number of cores of processors the number of threads supported by each core. Namely: CPU (s) = Socket (s) * Core (s) * Thread (s).

Let's take a look at how it is described in MAN:

[xxx@localhost ~] $man lscpu COLUMNS CPU The logical CPU number of a CPU as used by the Linux kernel. # logical CPU quantity CORE The logical core number. A core can contain several CPUs. # number of logical cores SOCKET The logical socket number. A socket can contain several cores. # number of logical slots (paths)\ 2. Cat / proc/cpuinfo: view CPU details

[xxx@localhost ~] $cat / proc/cpuinfo processor: 0 vendor_id: GenuineIntel cpu family: 6 model: 63 model name: Intel (R) Xeon (R) CPU E5-2690 v3 @ 2.60GHz stepping: 0 cpu MHz: 2599.998 cache size: 30720 KB fpu: yes fpu_exception: yes cpuid level: 13 wp: yes Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx hypervisor lahf_lm ida arat epb pln pts dts bogomips: 5199.99 clflush size: 64 cache_alignment: 64 address sizes: 40 bits physical 48 bits virtual power management: processor: 1 vendor_id: GenuineIntel cpu family: 6 model: 63 model name: Intel (R) Xeon (R) CPU E5-2690 v3 @ 2.60GHz stepping: 0 cpu MHz: 2599.998 cache size: 30720 KB fpu: yes fpu_exception: yes cpuid level: 13 wp: yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx hypervisor lahf_lm ida arat epb pln pts dts bogomips: 5199.99 clflush size: 64 cache_alignment: 64 address sizes: 40 bits physical 48 bits virtual power management: processor: 2 vendor_id: GenuineIntel cpu family: 6 model: 63 model name: Intel (R) Xeon (R) CPU E5-2690 v3 @ 2.60GHz stepping: 0 cpu MHz: 2599.998 cache size: 30720 KB fpu: yes fpu_exception: yes cpuid level: 13 wp: yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx hypervisor lahf_lm ida arat epb pln pts dts bogomips: 5199.99 clflush size: 64 cache_alignment: 64 address sizes: 40 bits physical 48 bits virtual power management: processor: 3 vendor_id: GenuineIntel cpu family: 6 model: 63 model name: Intel (R) Xeon (R) CPU E5-2690 v3 @ 2.60GHz stepping: 0 cpu MHz: 2599.998 cache size: 30720 KB fpu: yes fpu_exception: yes cpuid level: 13 wp: yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx hypervisor lahf_lm ida arat epb pln pts dts bogomips: 5199.99 clflush size: 64 cache_alignment: 64 address sizes: 40 bits physical 48 bits virtual power management: output like this The content is a little too much, and it will look a little confusing. We can use several commands to see what we want to know:

# View the number of physical CPU cat / proc/cpuinfo | grep "physical id" | sort | uniq # View the number of core in each physical CPU (that is, the number of cores) cat / proc/cpuinfo | grep "cpu cores" | uniq # View the number of threads in each physical CPU cat / proc/cpuinfo | grep "siblings" | uniq # View the number of logical CPU cat / proc/cpuinfo | grep "processor" # View CPU model cat / proc/cpuinfo | grep "model name" | uniq memory view / proc/meminfo or use the free command. The free command is the information obtained from meminfo. In general, we can get what we want to know by using free:

[xxx@localhost] $free-m total used free shared buffers cached Mem: 7868 954 6914 064 619-/ + buffers/cache: 271 7597 Swap: 4031 0 4031, you can see that the memory size is 8 GB.

Hard disk\ 1. Lsblk:blk is an abbreviation for block. List block devices

[xxx@localhost ~] $lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sr0 11:0 1 1024M 0 rom sdb 8:16 0 100G 0 disk sdb1 8:17 0 100G 0 part / data sda 8:0 0 60G 0 disk ├ ─ sda1 8:1 0 500M 0 part / boot └─ sda2 8:2 059.5G 0 part ├─ VolGroup-lv_root (dm-0) 253G050G 0 lvm / ├─ VolGroup-lv_swap (dm-1) 253G04G 0 lvm [SWAP] └─ VolGroup-lv_home (dm-2) 253G05.6G 0 lvm / home TYPE=disk stands for hard disk. As you can see, the hard disk is divided into sda and sdb, a total of 160g.

\ 2. Df: view hard disk usage

[xxx@localhost ~] $df-h Filesystem Size Used Avail Use% Mounted on / dev/mapper/VolGroup-lv_root 50G 1.7G 46G 4% / tmpfs 3.9G 0 3.9G 0% / dev/shm / dev/sda1 485M 39M 421m 9% / boot / dev/mapper/VolGroup-lv_home 5.5G 165m 5.1G 4% home / dev/sdb1 99G 188m 94G 1% / data add up the Size of all rows You can also calculate the size of the hard drive.

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