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Show installed RAM modules and free slots

harmless rootSystem and hardwaredebian, ubuntu
root@server
dmidecode -t memory | grep -E '^\s+(Size|Type|Speed|Locator|Manufacturer|Part Number):'

Shows size, type such as DDR4, speed, manufacturer and part number for each slot (Locator). Empty slots show Size: No Module Installed. Useful before an upgrade or to clearly identify a faulty module in the data center.

Note: On virtual servers, the emulated firmware only returns placeholder values. If the command is missing: apt install dmidecode.

Also searched as

  • which ram modules are installed
  • show free memory slots
  • what ram type for upgrade

Related one-liners

All in System and hardware

Show server manufacturer, model and serial number

#dmidecode -s system-manufacturer && dmidecode -s system-product-name && dmidecode -s system-serial-number
harmlessSystem and hardware

Show BIOS or UEFI version and date

#dmidecode -s bios-vendor && dmidecode -s bios-version && dmidecode -s bios-release-date
harmlessSystem and hardware

Show CPU and hardware temperatures

$sensors
harmlessSystem and hardware

Show CPU model, cores and threads

$LC_ALL=C lscpu | grep -E '^\s*(Model name|CPU\(s\)|Thread\(s\) per core|Core\(s\) per socket|Socket\(s\)|Virtualization|Hypervisor vendor|L3)'
harmlessSystem and hardware

Show hardware errors and warnings in the kernel log

#dmesg -T --level=err,warn
harmlessSystem and hardware

Show memory, swap areas and swappiness

$free -h && swapon --show && cat /proc/sys/vm/swappiness
harmlessSystem and hardware

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The commands on myline.de act directly on servers, files and databases. A wrong path or placeholder can delete data irreversibly or make a server unreachable.

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