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Скачать или смотреть How to determine the OS architecture 32-bit or 64-bit on a Linux

  • Slap Ya Administrator
  • 2025-04-24
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How to determine the OS architecture 32-bit or 64-bit on a Linux
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Описание к видео How to determine the OS architecture 32-bit or 64-bit on a Linux

Learn how to determine the OS architecture 32 bit or 64 bit on a Linux.

A 32-bit or 64-bit system is technically referred to based on its CPU architecture, data bus width, register size, and memory addressing capability. Here’s a breakdown of the key terms:

1. CPU Architecture (Word Size)
32-bit system: Uses a 32-bit CPU, meaning its registers, ALU (Arithmetic Logic Unit), and data bus are designed to handle 32 bits (4 bytes) at a time.

64-bit system: Uses a 64-bit CPU, handling 64 bits (8 bytes) per operation, allowing more efficient processing of larger numbers and memory addresses.

2. Memory Addressing
32-bit systems can directly address up to 2³² = 4 GB of RAM (in practice, often limited to ~3.2–3.5 GB due to reserved memory regions).

64-bit systems can theoretically address 2⁶⁴ = 16 exabytes (EB) of RAM, though most OSes impose lower practical limits (e.g., 256 TB on modern x86-64 systems).

3. Operating System (OS) Classification
A 32-bit OS runs only on 32-bit CPUs and supports up to 4 GB RAM (with PAE extensions allowing slightly more in some cases).

A 64-bit OS runs on 64-bit CPUs (backward compatible with 32-bit software via emulation) and supports vastly more RAM.

4. Instruction Set Architecture (ISA)
x86 (IA-32): The classic 32-bit Intel/AMD architecture (e.g., Pentium, Core Duo).

x86-64 (AMD64/Intel 64): The 64-bit extension of x86 (modern CPUs like Ryzen, Core i7).

ARMv7 (AArch32): 32-bit ARM processors (older smartphones, embedded systems).

ARMv8-A (AArch64): 64-bit ARM (modern smartphones, Apple M1/M2, Raspberry Pi 3+).

5. Software Compatibility
32-bit software runs on both 32-bit and 64-bit CPUs (via emulation in 64-bit OSes).

64-bit software requires a 64-bit CPU and OS.

Common Technical Terms
"x86" → Typically refers to 32-bit systems.

"x64" or "x86-64" → Refers to 64-bit systems (AMD64/Intel 64).

"IA-64" → Refers to Intel’s Itanium architecture (different from x86-64).

"LP64" (Linux/macOS) or "LLP64" (Windows) → Data models defining how integers/long pointers are stored in 64-bit systems.

Conclusion
A 32-bit system is called an x86, IA-32, or AArch32 (ARM) system, while a 64-bit system is called an x86-64, AMD64, AArch64, or IA-64 (Itanium) system, depending on the CPU architecture. The terms also define memory limits, OS capabilities, and software compatibility.


These are the commands used in my video.

Determine if it is 32-bit or 64 bit architecture
uname -m
dpkg --print-architecture
lscpu | grep "Architecture"
grep -o -w 'lm' /proc/cpuinfo | head -n 1


BONUS: OS Type on Ubuntu
lsb_release -a

#linux #tips #shorts #fyp

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