tar cvJf zzz.tbz FreeBSD-11.1-RELEASE-i386-bootonly.iso

x64
Sun Sep 17 22:08:53 JST 2017
a FreeBSD-11.1-RELEASE-i386-bootonly.iso
Sun Sep 17 22:11:09 JST 2017
２分２６秒

x86
Sun Sep 17 22:13:43 JST 2017
a FreeBSD-11.1-RELEASE-i386-bootonly.iso
Sun Sep 17 22:16:24 JST 2017
２分４１秒