Linux System Information

Linux System Information | Generated by AI

Home 2025.03

In Ubuntu, you can retrieve system information such as whether the system is 32-bit or 64-bit, the operating system version, the amount of RAM, and the disk size using the following commands. Below is a step-by-step guide:

1. Determine if the System is 32-bit or 64-bit

Command: uname -m
Explanation: This command displays the machine hardware name.
- If the output is x86_64, your system is 64-bit.
- If the output is i686 or i386, your system is 32-bit.
Example Output:
```
x86_64
```
This indicates a 64-bit system.

2. Get the Operating System (OS) Version

Command: lsb_release -a
Explanation: This command provides detailed information about the Linux Standard Base (LSB) and the distribution.
- Look for the Description line to see the Ubuntu version.

Example Output:

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.3 LTS
Release:        20.04
Codename:       focal

Here, the OS is Ubuntu 20.04.3 LTS.

3. Get the RAM Size

Command: free -h
Explanation: This command shows memory usage in a human-readable format (e.g., GB or MB).
- Look at the total column under the Mem: row to find the total installed RAM.

Example Output:

            total        used        free      shared  buff/cache   available
Mem:          15Gi       2.3Gi       9.5Gi       300Mi       3.8Gi        12Gi
Swap:        2.0Gi         0B       2.0Gi

In this case, the total RAM is 15 GB.

4. Get the Disk Size

Command: lsblk -d -o NAME,SIZE
Explanation: This command lists all disk devices (excluding partitions) with their sizes.
- The -d flag ensures only disk devices (e.g., /dev/sda) are shown, not their partitions.
- Look for the disk name (e.g., sda) and its corresponding size.
Example Output:
```
NAME   SIZE
sda    1T
sdb    500G
```
Here, the system has two disks: /dev/sda with a size of 1 terabyte and /dev/sdb with 500 gigabytes. If you have only one disk, it will typically be sda.

Notes

These commands use standard tools available in Ubuntu, requiring no additional installations.
For disk size, if your system has multiple disks, the output will list all of them. Typically, /dev/sda is the primary disk.
Run these commands in a terminal to see the results specific to your system.

With these commands, you can quickly gather the essential system information you need on your Ubuntu machine!

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