2022年9月29日，天气:晴

每次ubuntu12.04重启后，/etc/resolv.conf被重写为空或127.0.0.1

今天遇到一个问题：每次ubuntu12.04重启后，/etc/resolv.conf被重写为空或127.0.0.1

经过网上查资料以及本人验证，一下方法是可行的：

1.编辑/etc/resolvconf/resolv.conf.d/tail

（如果没有该文件，则建立一个文件名为tail的文本文件即可）

2.在里面添加：nameserver xxx.xxx.xxx.xxx

xxx替换为你要的实际dns地址（我设置的是192.168.1.1）

这样每次重启后，它会将你所编辑添加的dns服务器写入/etc/resolv.conf中

使resolv.conf不至于每次都重置成空白或只剩127.0.0.1。
 

mysqldump: Error: 'Access denied; you need (at least one of) the PROCESS privilege(s) for this operation' when trying to dump tablespaces

 安装mysql5.7备份出现上面报错

需要给账号权限

GRANT PROCESS ON *.* TO '数据库用户'@'localhost';

flush privileges;

ERROR: The certificate of `url' is not trusted. ERROR: The certificate of `url' hasn't got a known issuer.

ERROR: The certificate of `url' is not trusted.

ERROR: The certificate of `url' hasn't got a known issuer.

If you are using Debian or Ubuntu, install the ca-certificates package:

$ sudo apt-get install ca-certificates

If you don't care about checking the validity of the certificate, use the --no-check-certificate option:

$ wget --no-check-certificate https://download/url

Note: The second option is not recommended because of the possibility of a man-in-the-middle attack.