pair. When a process opens /dev/ptmx , it gets a file descriptor for a pseudoterminal masterslow, increase this number; if the system gets too slow, decrease this number. The defaultpair. When a process opens /dev/ptmx , it gets a file descriptor for a pseudoterminal masterbuffer of size buf_size which gets added to the entropy pool. RNDZAPENTCNT RNDCLEARPOOL Zerobuffer of size buf_size which gets added to the entropy pool. RNDZAPENTCNT RNDCLEARPOOL Zero