x86_64

This command is an alias for setarch x86_64.
View documentation for the original command

$ tldr setarch

x86_64 [options] [program [arguments]]

x86_64 is a symlink to setarch that runs a program with the reported architecture set to x8664. It is equivalent to running **setarch x8664**.
This is typically used on 64-bit systems to ensure programs detect and run in 64-bit mode, though on native x86_64 systems this is usually the default behavior.

setarch(8), linux32(8), linux64(8)