vi /usr/bin/lolcat

#!/bin/sh
awk ‘{
srand();
for (i = 1; i <= length($0); i++) {
c = substr($0, i, 1);
color = int(rand() * 256);
printf “\033[38;5;%dm%c\033[0m”, color, c;
}
print “”;
}’

chmod 777

fortune | cowsay | lolcat # 直接输出彩虹效果