austin@austin1:~$ busybox sysctl --system sysctl: unrecognized option '--system' BusyBox v1.24.1 (2015-12-08 17:41:42 CST) multi-call binary. Usage: sysctl [OPTIONS] [KEY[=VALUE]]... Show/set kernel parameters -e Don't warn about unknown keys -n Don't show key names -a Show all values -w Set values -p FILE Set values from FILE (default /etc/sysctl.conf) -q Set values silently This is needed by OpenRC: Standalone sysctl supports a --system option which is very useful because it reads files from system configuration directories. OpenRC uses this in the sysctl boot script, so it would be good if busybox's sysctl could support it. See https://bugs.gentoo.org/show_bug.cgi?id=545410