有名管道 pipe fifo
两个终端运行，一个输入，一个输出
#!/bin/shif [ ! -p /root/mytest/testpipe ]then /bin/mknod /root/mytest/testpipe pfiwhile :do read msg if [ "$msg" = "" ] then continue else echo "$msg" fidone < /root/mytest/testpipe
#!/bin/shtty=`who am i | awk '{print $2}'`#tty=pts/3while :do echo "enter your name: \c" >/dev/$tty read name echo "$name haha"done > /root/mytest/testpipe