how do you use system calls?
i've just compiled a new 18.104.22.168 kernel and it said it had a new system call, kexec. apparently it lets you switch kernels without shutting down. what i want to know is, how do i use a system call? would i have to write(or download) a program that sends it? or can i just type "kexec -options <kernel>" or something using bash?