Linux Preparing To Finally Remove Support For The a.out Format Written by Michael Larabel in Linux Kernel on 13 January 2022 at 03:00 PM EST. 46 Comments Back in 2019 the Linux kernel deprecated a.out support for that file format used several decades ago before ELF tookover. Now in 2022 it looks like that a.out code will be removed from the kernel. Linux relied on the a.out format until v1.2 in th