#！/bin/bash mkfifo fifiofile exec 6<> fifofile echo >&6 echo >&6 echo >&6 echo >&6 echo >&6 for i in {1..60} do read -u 6 { user=user$i useradd user$i &> /dev/null if [ $? -eq 0 ]; then echo "user$i is create" else echo "user$i已存在" fi echo >&6
}& done wait echo 完成
