Checking Linux Server Hardware Info - CPU, Memory, Disk, Network
This post collects commands for inspecting the hardware installed on a server: CPU, memory, disks, network interface cards, GPU, and so on.
Based on Ubuntu 24.04 Server
[01] Related Commands
| Command | Description |
|---|---|
dmidecode |
Print hardware info from the system DMI (SMBIOS) tables |
free |
Show available and used memory |
lshw |
Extract hardware config such as memory settings, firmware version, CPU speed, and bus speed |
lsblk |
List block device info, derived from the sysfs filesystem |
lscpu |
Print CPU info: architecture, cores/threads, sockets, etc. |
[02] CPU Information
1
2
3
4
5
6
lscpu
# Extract only the relevant fields
# Architecture, number of processors, threads per core, cores per socket, sockets, model name, NUMA info
# Processors = Cores * threads-per-core * sockets
lscpu |grep -E 'Archi|On-line|Thread|socket|Socket|Model |NUMA'
[03] Memory Information
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
# Show the size of installed memory (including empty slots)
dmidecode -t memory |grep -i size
# Show only the slots that actually have memory installed
dmidecode -t memory |grep -i size | egrep -Ev No
# Count the number of populated memory slots
dmidecode -t memory |grep -i size | egrep -Ev No | wc -l
# Show total memory capacity
free -mh
# When `dmidecode -t memory` output includes lines like "Volatile Size"
# Count total slots = (slots with GB value) + (No Module Installed) - (Volatile Size lines)
dmidecode -t memory | egrep "Size: ([0-9]+ GB|No Module Installed)" |grep -v "Volatile Size:" | wc -l
# List installed memory modules and count them
dmidecode -t memory | egrep "Size: [0-9]+ GB" | grep -v "Volatile Size:"
dmidecode -t memory | egrep "Size: [0-9]+ GB" | grep -v "Volatile Size:"| wc -l
# List empty slots and count them
dmidecode -t memory | egrep "Size: No Module Installed"
dmidecode -t memory | egrep "Size: No Module Installed" | wc -l
# Check the DDRx generation of the installed memory
lshw -short -C memory
[04] Disk Information
1
2
3
4
5
# Show disk devices
lsblk
# Show disk devices with bus info
lshw -c disk -businfo
[05] Network Information
1
2
# Show network devices with bus info
lshw -c network -businfo
[06] GPU Information
1
2
3
4
5
# Show display/GPU devices
lshw -C display
# When using an NVIDIA GPU with the driver installed
nvidia-smi