When run levels are changed (for example when going to shutdown the system) the init program is going to send the TERM and KILL signals to all the processes that init started. But init prints a message to the screen saying "sending all processes the TERM signal" and the same for the KILL signal. This implies that init sends this signal to all the currently running processes, which isn't the case. To avoid this confusion, you change the init.c file so that the sentence reads "sending all processes started by init the TERM signal" by running the following commands. If you don't want to change it, skip it. cp src/init.c src/init.c.backup && sed 's/\(.*\)\(Sending processes\)\(.*\)/\1\2 started by init\3/' \    src/init.c > tmp~ && mv tmp~ src/init.c Install Sysvinit by running the following commands: make -C src && make -C src install