Use a pesquisa de pacotes para localizar o pacote com killall
Search Results Found 5 matches for bin/killall
busybox-1.23.2-1 - busybox: Tiny utilities in a single executable (installed binaries and support files) psmisc-debuginfo-22.20-1 - psmisc-debuginfo: Debug info for psmisc (installed binaries and support files) psmisc-22.20-1 - psmisc: Utilities for managing processes on your system (installed binaries and support files) sysvinit-debuginfo-2.86-1 - sysvinit-debuginfo: Debug info for sysvinit (installed binaries and support files) sysvinit-2.86-1 - sysvinit: A System-V Init Clone (installed binaries and support files)
O psmisc é o que você precisa.