问题

在命令行输入命令时，不显示输入的命令，但是有结果出现

[root@peipei ~]# [root@peipei ~]# [root@peipei ~]# [root@peipei ~]# 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:16:3e:03:64:91 brd ff:ff:ff:ff:ff:ff
    inet 172.21.168.75/20 brd 172.21.175.255 scope global dynamic eth0
       valid_lft 315188648sec preferred_lft 315188648sec

[root@peipei ~]# zhangwuji:x:9901:1010::/home/zhangwuji:/bin/bash
songxiaobao:x:9902:1011::/home/songxiaobao:/bin/bash
linhuchong:x:9903:1010::/home/linhuchong:/bin/bash

解决方法

stty(set tty)命令用于显示和修改当前注册的终端的属性

#禁止回显
stty -echo   

#打开回显
stty echo

更多详细stty的设置，点击stty