How to view cpu, memory, hard disk, and other hardware information in linux

How to view cpu, memory, hard disk, and other hardware information in linux

Note: in Linux, you can view detailed information about each cpu in/proc/cpuinfo. However, for dual-core CPUs, two CPUs are displayed in cpuinfo. It is often mistaken for two single-core CPUs.

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I. linux CPU size

1. [Root @ idc ~] # Cat/proc/cpuinfo | grep "model name" & cat/proc/cpuinfo | grep "physical id"
2. Model name: Intel (R) Xeon (TM) CPU 2.80 GHz
3. Model name: Intel (R) Xeon (TM) CPU 2.80 GHz
4. Model name: Intel (R) Xeon (TM) CPU 2.80 GHz
5. Model name: Intel (R) Xeon (TM) CPU 2.80 GHz
6. Physical id: 0
7. Physical id: 0
8. Physical id: 3
9. Physical id: 3
10. [Root @ idc ~] #

In fact, Physical Processor ID should be used to distinguish between single-core and dual-core. Physical Processor ID can be found from cpuinfo or dmesg. flags if ht indicates that the number of physical CPUs can be determined by hyperthreading technology. The value of Physical id can be viewed.

As you can see, this machine has two dual-core CPUs with IDs 0 and 3, respectively, and the size is 2.8 GB.

Ii. Memory size

1. [Root @ xbidc ~] # Cat/proc/meminfo | grep MemTotal
2. MemTotal: 1034612 kB
3. [Root @ xbidc ~] #

Iii. Hard Disk size

1. [Root @ xbidc ~] # Fdisk-l | grep Disk
2. Disk/dev/sda: 300.0 GB, 300000000000 bytes
3. [Root @ xbidc ~] #

4. More methods to view linux hardware information

1. Uname-a # linux system information command for viewing kernel/operating system/CPU Information
2. Head-n 1/etc/issue # view the operating system version, which is a number 1, not a letter L
3. Cat/proc/cpuinfo # linux system information command for viewing CPU Information
4. Hostname # linux system information command for viewing computer names
5. Lspci-TV # list all PCI devices
6. Lsusb-TV # linux system information commands for listing all USB devices
7. Lsmod # list loaded Kernel Modules
8. Env # view environment variable resources
9. Free-m # view memory usage and swap zone usage
10. Df-h # view the usage of each partition
11. Du-sh # view the size of the specified directory
12. Grep MemTotal/proc/meminfo # view total memory
13. Grep MemFree/proc/meminfo # view the Amount of idle memory
14. Uptime # view system running time, number of users, and load
15. Cat/proc/loadavg # view system load disks and partitions
16. Mount | column-t # view the status of the mounted Partition
17. Fdisk-l # view all partitions
18. Swapon-s # view all swap partitions
19. Hdparm-I/dev/hda # view disk parameters (only applicable to IDE devices)
20. Dmesg | grep IDE # view the network of IDE Device Detection Status at startup
21. Ifconfig # view the attributes of all network interfaces
22. Iptables-L # view firewall settings
23. Route-n # view the route table
24. Netstat-lntp # view all listening ports
25. Netstat-antp # view all established connections
26. Netstat-s # view network statistics process
27. Ps-ef # view all processes
28. Top # real-time display of Process status users
29. W # view active users
30. Id # view specified user information
31. Last # view User Logon logs
32. Cut-d:-f1/etc/passwd # view all users in the system
33. Cut-d:-f1/etc/group # view all groups in the system
34. Crontab-l # view the scheduled Task Service of the current user
35. Chkconfig-list # list all system services
36. Chkconfig-list | grep on # list all started system service programs
37. Rpm-qa # view all installed software packages
38. Cat/proc/cpuinfo: linux system command for viewing CPU-related parameters
39. Cat/proc/partitions: Command Used to view linux hard disk and partition information
40. Cat/proc/meminfo: linux system command for viewing linux system memory information
41. Cat/proc/version: view the version, similar to uname-r
42. Cat/proc/ioports: view the device's io port
43. Cat/proc/interrupts: view the interrupt
44. Cat/proc/pci: View pci device information
45. Cat/proc/swaps: View information about all swap partitions