To find out whether a Unix operating system is 32-bit or 64-bit, you can use the uname command with the -m option.
For example, you can use the following command to display the machine hardware name of the system:
uname -m
If the output of this command is x86_64, then the system is a 64-bit system. If the output is i686 or i386, then the system is a 32-bit system.
You can also use the getconf command with the LONG_BIT option to display the number of bits in the system's data type. For example:
getconf LONG_BIT
If the output of this command is 64, then the system is a 64-bit system. If the output is 32, then the system is a 32-bit system.
Overall, the uname and getconf commands are useful tools for finding out whether a Unix operating system is 32-bit or 64-bit.