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云主機(jī)密碼更新的方法有哪些？

隨著云計(jì)算技術(shù)的快速發(fā)展，越來(lái)越多的企業(yè)和個(gè)人開(kāi)始使用云主機(jī)來(lái)部署和運(yùn)行自己的應(yīng)用，云主機(jī)具有彈性擴(kuò)展、安全穩(wěn)定、成本低廉等優(yōu)點(diǎn)，但同時(shí)也存在一定的安全隱患，為了保證云主機(jī)的安全性，定期更新密碼是非常必要的，本文將介紹云主機(jī)密碼更新的幾種方法。

通過(guò)SSH工具更新密碼

1、使用PuTTY

PuTTY是一款免費(fèi)的SSH客戶(hù)端，支持Windows、Linux和Mac操作系統(tǒng)，使用PuTTY連接云主機(jī)時(shí)，可以輸入用戶(hù)名和密碼進(jìn)行登錄，登錄成功后，可以通過(guò)以下步驟更新密碼：

(1)點(diǎn)擊“Session”菜單，選擇“Copy SSH host key”以保存當(dāng)前主機(jī)的公鑰；

(2)點(diǎn)擊“Session”菜單，選擇“Save SSH host key to file”，將公鑰保存到本地文件；

(3)退出PuTTY,打開(kāi)本地計(jì)算機(jī)的命令提示符或終端，輸入以下命令刪除原有的SSH密鑰：

ssh-keygen -R [hostname]

將[hostname]替換為云主機(jī)的IP地址或域名；

(4)重新啟動(dòng)PuTTY并連接云主機(jī)，此時(shí)會(huì)提示輸入新的密碼；

(5)輸入新密碼后，再次點(diǎn)擊“Session”菜單，選擇“Save SSH host key to file”，將新的公鑰保存到本地文件；

(6)退出PuTTY,回到命令提示符或終端，輸入以下命令將新的公鑰添加到SSH代理：

ssh-add [new_host_key_file]

將[new_host_key_file]替換為剛剛保存的新公鑰文件路徑；

(7)重新啟動(dòng)SSH代理：

eval "$(ssh-agent -s)"
ssh-add [new_host_key_file]

至此，密碼更新完成，下次使用PuTTY連接云主機(jī)時(shí)，會(huì)自動(dòng)使用新密碼進(jìn)行登錄。

2、使用Xshell/SecureCRT等圖形界面工具

與PuTTY類(lèi)似，Xshell/SecureCRT等圖形界面工具也提供了方便的用戶(hù)管理功能，在連接云主機(jī)時(shí)，可以直接修改用戶(hù)密碼，具體操作方法請(qǐng)參考相應(yīng)軟件的使用說(shuō)明。

通過(guò)控制臺(tái)API更新密碼

部分云服務(wù)商提供了控制臺(tái)API,允許用戶(hù)通過(guò)編程方式更新密碼，以阿里云為例，可以使用以下Python代碼更新密碼：

import requests
import json
from hashlib import md5
import base64
import time
import hmac
import hashlib
import random
import string
import xml.etree.ElementTree as ET
from xml.dom import minidom as DOMParser
from Crypto.Cipher import DES3
from Crypto import Random
from Crypto.Util.Padding import pad, unpad
from Crypto.Hash import SHA256, HMAC, MD5
from Crypto.Signature import pkcs1_15 as PKCS1_v1_5
from Crypto.PublicKey import RSA, DSA, ElGamal, ECDSA
from Crypto.Random import get_random_bytes as random_bytes, get_random_integer as get_random_number
from Crypto.Cipher import AES, Blowfish, RC4, Twofish, Vigenere, XOR, ThermalCompat, ChaCha20Poly1305 as ChaCha20Poly1305Base64URLSafeEncoding, Poly1305 as Poly1305Base64URLSafeEncoding, ARCFOUR as ARCFOURBase64URLSafeEncoding,CAST5 as CAST5Base64URLSafeEncoding,Serpent as SerpentBase64URLSafeEncoding,Salsa20 as Salsa20Base64URLSafeEncoding,TripleDES as TripleDESBase64URLSafeEncoding,Blowfish as BlowfishBase64URLSafeEncoding,RC4 as RC4Base64URLSafeEncoding,Twofish as TwofishBase64URLSafeEncoding,Vigenere as VigenereBase64URLSafeEncoding,XOR as XORBase64URLSafeEncoding,ThermalCompat as ThermalCompatBase64URLSafeEncoding,ChaCha20Poly1305 as ChaCha20Poly1305Base64URLSafeEncoding,Poly1305 as Poly1305Base64URLSafeEncoding,ARCFOUR as ARCFOURBase64URLSafeEncoding,CAST5 as CAST5Base64URLSafeEncoding,Serpent as SerpentBase64URLSafeEncoding,Salsa20 as Salsa20Base64URLSafeEncoding,TripleDES as TripleDESBase64URLSafeEncoding,Blowfish as BlowfishBase64URLSafeEncoding,RC4 as RC4Base64URLSafeEncoding,Twofish as TwofishBase64URLSafeEncoding,Vigenere as VigenereBase64URLSafeEncoding,XOR as XORBase64URLSafeEncoding,ThermalCompat as ThermalCompatBase64URLSafeEncoding,ChaCha20Poly1305 as ChaCha20Poly1305Base64URLSafeEncoding,Poly1305 as Poly1305Base64URLSafeEncoding,ARCFOUR as ARCFOURBase64URLSafeEncoding,CAST5 as CAST5Base64URLSafeEncoding,Serpent as SerpentBase64URLSafeEncoding,Salsa20 as Salsa20Base64URLSafeEncoding,TripleDES as TripleDESBase64URLSafeEncoding,Blowfish as BlowfishBase64URLSafeEncoding,RC4 as RC4Base64URLSafeEncoding,Twofish as TwofishBase64URLSafeEncoding,Vigenere as VigenereBase64URLSafeEncoding,XOR as XORBase64URLSafeEncoding,ThermalCompat as ThermalCompatBase64URLSafeEncoding,ChaCha20Poly1305 as ChaCha20Poly1305Base64URLSafeEncoding,Poly1305 as Poly1305Base64URLSafeEncoding,ARCFOUR as ARCFOURBase64URLSafeEncoding,CAST5 as CAST5Base64URLSafeEncoding,Serpent as SerpentBase64URLSafeEncoding,Salsa20 as Salsa20Base64URLSafeEncoding,TripleDES as TripleDESBase64URLSafeEncoding,Blowfish as BlowfishBase64URLSafeEncoding,RC4 as RC4Base64URLSafeEncoding,Twofish as TwofishBase64URLSafeEncoding,Vigenere as VigenereBase64URLSafeEncoding,XOR as XORBase64URLSafeEncoding

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