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free -m
total used free shared buffers cached Mem: 3500 637 2863 0 51 290 -/+ buffers/cache: 294 3205 Swap: 7999 0 7999
The memory space is displayed in MB, and the total column after "Mem" is the memory size. 3500 is actually 4GB.
【View memory slots and memory sticks】
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dmidecode --type memory
# dmidecode 2.11 SMBIOS 2.7 present. Handle 0x0040, DMI type 16, 23 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 32 GB ##The maximum amount the hardware can support Error Information Handle: Not Provided Number Of Devices: 4 ##Number of memory slots Handle 0x0042, DMI type 17, 34 bytes Memory Device Array Handle: 0x0040 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 4096 MB ##Memory stick space Form Factor: DIMM Set: None Locator: ChannelA-DIMM0 Bank Locator: BANK 0 ##Slot location number Type: DDR3 ##Memory type Type Detail: Synchronous Speed: 1333 MHz ##Memory frequency Manufacturer: Kingston ##Memory stick manufacturer Serial Number: 9B369A8C Asset Tag: 9876543210 Part Number: 99P5474-055.A00LF Rank: 1 Configured Clock Speed: 1333 MHz Handle 0x0044, DMI type 17, 34 bytes Memory Device Array Handle: 0x0040 Error Information Handle: Not Provided Total Width: Unknown Data Width: Unknown Size: No Module Installed ##There is no memory module installed in the slot Form Factor: DIMM Set: None Locator: ChannelA-DIMM1 Bank Locator: BANK 1 Type: Unknown Type Detail: None Speed: Unknown Manufacturer: [Empty] Serial Number: [Empty] Asset Tag: 9876543210 Part Number: [Empty] Rank: Unknown Configured Clock Speed: Unknown
【View disk and partition status】
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fdisk -l
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes ##Disk sda space 1TB, divided into three areas 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x0002cb39 Device Boot Start End Blocks Id System /dev/sda1 * 1 26 204800 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 26 1046 8192000 82 Linux swap / Solaris /dev/sda3 1046 121602 968364032 83 Linux
[View the disk partition mounting status]
Compare with fdisk -l, you can see which directory each partition space is mounted to, and whether any disk partitions are not mounted for use.
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df -h
Filesystem Size Used Avail Use% Mounted on /dev/sda3 910G 5.1G 858G 1% / ##The largest partition of disk sda sda3 is mounted in the root directory of 910GB tmpfs 1.8G 72K 1.8G 1% /dev/shm /dev/sda1 194M 32M 152M 18% /boot
【View hard disk hardware information】
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smartctl --all /dev/sda
If this tool command is not supported, you can use hdparm -i /dev/sda to view the model, it is recommended to install this tool
smartctl 5.43 2012-06-30 r3573 [i686-linux-2.6.32-431.el6.i686] (local build) Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Model Family: Seagate Barracuda (SATA 3Gb/s, 4K Sectors) ##Manufacturer Device Model: ST1000DM003-1ER162 ##Model Serial Number: W4Y4PK8N ##Serial Number LU WWN Device Id: 5 000c50 08a8951c8 Firmware Version: CC46 User Capacity: 1,000,204,886,016 bytes [1.00 TB] ##Space Sector Sizes: 512 bytes logical, 4096 bytes physical Device is: In smartctl database [for details use: -P show] ATA Version is: 8 ATA Standard is: ACS-2 (unknown minor revision code: 0x001f) Local Time is: Fri Jan 12 14:19:32 2018 CST SMART support is: Available - device has SMART capability. SMART support is: Enabled
If there is a RAID card, refer to http://blog.csdn.net/msdnchina/article/details/52475383
[View CPU hardware information]
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dmidecode --type processor
# dmidecode 2.11 SMBIOS 2.7 present. Handle 0x0041, DMI type 4, 42 bytes Processor Information Socket Designation: SOCKET 0 ##Socket 0 Type: Central Processor Family: Pentium ##family series Manufacturer: Intel(R) Corporation ##Manufacturer ID: A7 06 02 00 FF FB EB BF Signature: Type 0, Family 6, Model 42, Stepping 7 Flags: FPU (Floating-point unit on-chip) VME (Virtual mode extension) DE (Debugging extension) PSE (Page size extension) TSC (Time stamp counter) MSR (Model specific registers) PAE (Physical address extension) MCE (Machine check exception) CX8 (CMPXCHG8 instruction supported) APIC (On-chip APIC hardware supported) SEP (Fast system call) MTRR (Memory type range registers) PGE (Page global enable) MCA (Machine check architecture) CMOV (Conditional move instruction supported) PAT (Page attribute table) PSE-36 (36-bit page size extension) CLFSH (CLFLUSH instruction supported) DS (Debug store) ACPI (ACPI supported) MMX (MMX technology supported) FXSR (FXSAVE and FXSTOR instructions supported) SSE (Streaming SIMD extensions) SSE2 (Streaming SIMD extensions 2) SS (Self-snoop) HTT (Multi-threading) TM (Thermal monitor supported) PBE (Pending break enabled) Version: Intel(R) Pentium(R) CPU G860 @ 3.00GHz ##CPU Model Voltage: 5.0 V 3.3 V 2.9 V External Clock: 100 MHz Max Speed: 3800 MHz Current Speed: 3000 MHz Status: Populated, Enabled Upgrade: Socket BGA1155 L1 Cache Handle: 0x003E L2 Cache Handle: 0x003D L3 Cache Handle: 0x003F Serial Number: Not Specified Asset Tag: Fill By OEM Part Number: Fill By OEM Core Count: 2 ##The total number of cores Core Enabled: 2 ##Total number of threads Thread Count: 2 Characteristics: 64-bit capable ##Whether 64-bit is supported
Below is the CPU information of another server.
# dmidecode 2.11 SMBIOS 2.8 present. # SMBIOS implementations newer than version 2.7 are not # fully supported by this version of dmidecode. Handle 0x0016, DMI type 4, 42 bytes Processor Information Socket Designation: CPU01 ##CPU1 Type: Central Processor Family: Xeon ##Xeon Manufacturer: Intel(R) Corporation ID: F2 06 03 00 FF FB EB BF Signature: Type 0, Family 6, Model 63, Stepping 2 Flags: FPU (Floating-point unit on-chip) VME (Virtual mode extension) DE (Debugging extension) PSE (Page size extension) TSC (Time stamp counter) MSR (Model specific registers) PAE (Physical address extension) MCE (Machine check exception) CX8 (CMPXCHG8 instruction supported) APIC (On-chip APIC hardware supported) SEP (Fast system call) MTRR (Memory type range registers) PGE (Page global enable) MCA (Machine check architecture) CMOV (Conditional move instruction supported) PAT (Page attribute table) PSE-36 (36-bit page size extension) CLFSH (CLFLUSH instruction supported) DS (Debug store) ACPI (ACPI supported) MMX (MMX technology supported) FXSR (FXSAVE and FXSTOR instructions supported) SSE (Streaming SIMD extensions) SSE2 (Streaming SIMD extensions 2) SS (Self-snoop) HTT (Multi-threading) TM (Thermal monitor supported) PBE (Pending break enabled) Version: Intel(R) Xeon(R) CPU E5-2609 v3 @ 1.90GHz ##型号Xeon E5-2609 v3 Voltage: 1.8 V External Clock: 100 MHz Max Speed: 3500 MHz Current Speed: 1900 MHz Status: Populated, Enabled Upgrade: <OUT OF SPEC> L1 Cache Handle: 0x0013 L2 Cache Handle: 0x0014 L3 Cache Handle: 0x0015 Serial Number: Not Specified Asset Tag: UNKNOWN Part Number: Not Specified Core Count: 6 ##Six cores Core Enabled: 6 Thread Count: 6 ##Six threads Characteristics: 64-bit capable Multi-Core Hardware Thread Execute Protection Enhanced Virtualization Power/Performance Control Handle 0x001B, DMI type 4, 42 bytes Processor Information Socket Designation: CPU02 ##Second CPU Type: Central Processor Family: Xeon Manufacturer: Intel(R) Corporation ID: F2 06 03 00 FF FB EB BF Signature: Type 0, Family 6, Model 63, Stepping 2 Flags: FPU (Floating-point unit on-chip) VME (Virtual mode extension) DE (Debugging extension) PSE (Page size extension) TSC (Time stamp counter) MSR (Model specific registers) PAE (Physical address extension) MCE (Machine check exception) CX8 (CMPXCHG8 instruction supported) APIC (On-chip APIC hardware supported) SEP (Fast system call) MTRR (Memory type range registers) PGE (Page global enable) MCA (Machine check architecture) CMOV (Conditional move instruction supported) PAT (Page attribute table) PSE-36 (36-bit page size extension) CLFSH (CLFLUSH instruction supported) DS (Debug store) ACPI (ACPI supported) MMX (MMX technology supported) FXSR (FXSAVE and FXSTOR instructions supported) SSE (Streaming SIMD extensions) SSE2 (Streaming SIMD extensions 2) SS (Self-snoop) HTT (Multi-threading) TM (Thermal monitor supported) PBE (Pending break enabled) Version: Intel(R) Xeon(R) CPU E5-2609 v3 @ 1.90GHz Voltage: 1.8 V External Clock: 100 MHz Max Speed: 3500 MHz Current Speed: 1900 MHz Status: Populated, Enabled Upgrade: <OUT OF SPEC> L1 Cache Handle: 0x0018 L2 Cache Handle: 0x0019 L3 Cache Handle: 0x001A Serial Number: Not Specified Asset Tag: UNKNOWN Part Number: Not Specified Core Count: 6 Core Enabled: 6 Thread Count: 6 Characteristics: 64-bit capable Multi-Core Hardware Thread Execute Protection Enhanced Virtualization Power/Performance Control