You can get Raspberry Pi OS in either a 32-bit and 64-bit architecture.
When you install applications, it can be important to know whether the operating system is 32-bit or 64-bit.
This quick guide shows how to check whether Raspberry Pi OS is 32-bit or 64-bit.
Tgetconf is a command line tool that is used to retrieve system configuration information at runtime. You can use the getconf command with the LONG_BIT option, prints the number of bits in a long integer data type on the system.
getconf LONG_BIT
If the command outputs 32, then the OS is 32-bit and if it outputs 64, then the OS is 64-bit.
Here is my output
user@raspberrypi:~ $ getconf LONG_BIT 64
Note
There are a few resources online that say you can do the following
uname -m
This command can be used to determine if the Linux kernel is 32-bit or 64-bit. A 32-bit OS can use a 32-bit or 64-bit kernel. On a Raspberry Pi 4 with a recent update the kernel changed to aarch64. So now, uname -m returns aarch64 instead of armv7l.
