Randomly generate 8 lowercase letters: 
ejxhfzqb
awk 'BEGIN{srand(); printf "%c%c%c%c%c%c%c%c\n",int(97+rand()*26),int(97+rand()*26),int(97+rand()*26),int(97+rand()*26),int(97+rand()*26),int(97+rand()*26),int(97+rand()*26),int(97+rand()*26)}'