记录腾讯云使用日志

1.ubuntu系统的电脑链接腾讯云出现的问题

今天电脑链接重装系统以后的腾讯云服务器出现如下问题：

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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:+HqFf10oiDU2Yjkx7ND655NmUJmQfw3AYnqmAVwntFE.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:1
  remove with:
  ssh-keygen -f "/root/.ssh/known_hosts" -R "xxx.xxxx.xx"
ECDSA host key for xxx.xxxx.xx has changed and you have requested strict checking.
Host key verification failed.
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主要缘由是以前电脑链接过服务器，服务器把登陆标识证书记录下来，下次登陆时会去比对以前的记录，因为服务器的系统重装标识变了致使不能继续登陆，解决方案是打开电脑的命令行执行 ssh-keygen -R 服务器公网ip ，便可解决这个问题，而后再执行 ssh 用户名@公网ip ,便可链接成功

2.centos7使用yum install安装wget无效的问题:

1.下载wget…tar.gz文件，拷贝到linux
下载地址: https://mirrors.ustc.edu.cn/gnu/wget/

2.解压tar -zxvf wget…tar.gz

3.cd到解压后的文件夹，能够看到configure命令
./configure --with-ssl=openssl
make
make install
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3.activemq启动报错信息为nested exception is java.net.URISyntaxException: Illegal character in hostname at index 7: ws://VM_0_9_centos:61614?maximumConnections=1000&wireFormat.maxFrameSize=104 857600

解决地址: www.cnblogs.com/likui360/p/…

4.mysql启动报 181228 11:47:05 [ERROR] Do you already have another mysqld server running on socket: /var/lib/mysql/mysql.sock ?

解决方法：chmod 777 /var/lib/mysql 给权限就好了