Symmetric encryption AES SM4, asymmetric encryption RSA SM2, hash digest SHA SM3: How are the strings generated by these algorithms turned into certificates?
Category: Odds and ends
除了gbase数据库，其它的东西都汇总到这里，包括linux操作系统等
Detailed Explanation of Underlying Communication Process and -vvv Parameter Output During SSH Connection
I. Basic Environment and Connection Initialization II. Identity File Detection SSH will prioritize "public key authentication" by default, so go to /root/.ssh first... Read more SSH 连接时的底层通信过程-vvv参数输出信息详解
Which party determines the encryption algorithm between the SSH client and server?
SSH, scp, and sftp clients and servers both support various encryption algorithms. Although the final decision rests with the server, the algorithm must be present in the client's provided list and also be supported by the server. Therefore, the client needs to list its most desired algorithms first.
Expand IPv6 Address Pure Shell Script
Pure Shell implementation for IPv6 address expansion (reverse formatting), converting compressed format to 8-segment, 4-digit full format. Supports address validity checks and handling of IPv6 addresses with prefixes.
IPv6 Address Compression Pure Shell Script
Pure Shell implementation of IPv6 address formatting (RFC standard compression format), without relying on iproute2, supports validating address validity, compressing zero segments, handling addresses with prefixes, and outputs all lowercase letters.
GBase 8a在龙蜥上用chronyc代替ntpdate解决时钟不一致问题
几台部署在龙蜥8.9 下的GBase 8a集群，在春节期间下电了，节后发现系统时钟不准。尝试用ntpdate同步发现不支持该命令，用yum 也无法安装ntp服务。经搜索发现，龙蜥用chronyc来实现时钟同步。
Network programming, a socket listens on a certain port. After the service starts, if a new IP is added, does it automatically listen, or does the service need to be restarted?
如果原本Socket是监听在0.0.0.0上，或者IPV6的:: 并且新增加的IP地址是在同一个接口上的别名，则会被监听到。否则如在新接口上的IP，【可能】需要重启服务。否则如果是绑定了特定的IP，比如特定地址，那么新增的IP不会被监听到，需要修改配置并重启服务。
南大通用GCDW技术栈 harbor-db容器版本postgresql断电后重启状态一直是Restarting
harbor内置了postgresql 13，因为其运行在容器docker内，发生故障无法启动时，已经不能通过docker run登录了。本文就是在宿主机异常断电后发生故障，导致服务无法启动，invalid primary checkpoint record。
南大通用GCDW技术栈-hadoop+kerberos配置
GCDW新版本支持hdfs作为存储，其中hadoop使用kerberos作为安全模式。本文介绍hadoop下kerberos的配置方案。
南大通用GCDW技术栈-kerberos的搭建和凭证生成
GCDW除了支持S3外，新版本还支持hdfs作为存储。本文介绍hadoop安全模式下kerberos的配置和凭证的生成。