用户名，密码程序在bash

Question

我有一个程序，询问用户输入他们的用户名和密码，然后将其存储在文本文件列一个是用户名和第2列是密码，我需要一个命令，以取代密码时用户输入自己的用户名和新密码，继承人我有什么

#!/bin/bash 
#admin menu 

#Register User 
echo enter the username of the user you want to register. 
read reguser 
echo enter the password of the user you want to register. 
read regpass 

User_Pass="username_pass.txt" 

if [ ! -e "$User_Pass" ]; 
then 
echo "Creating Username and Passwords file" 
touch $User_Pass 
fi 

echo "$reguser $regpass" | cat >> $User_Pass 

echo user succesfully registered. 

#Change Password 
echo "Enter the username you want to change the password for" 
read change1 

change2=$(grep -q $change1 username_pass.txt) 

if [ $change2=0 ]; 
then 
echo enter your new password 

read newpass 



awk -v newpass="$newpass" -v change1="$change1" '$1 ~ change1 {$2 = newpass}' username_pass.txt 
#i tried this but it didnt work 


    echo "password changed!" 
else 
    echo "no such username." 
fi 

Answer 1

您可以使用sed

sed -i "s/$change1.*/$change1 $newpass/" username_pass