ARTS-week52

发表于 分类于 本文字数： 815 阅读时长 ≈ 1 分钟

Algorithms

Hamming Distance 

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class Solution {
public:
    int hammingDistance(int x, int y) {
        int val = x ^ y;
        int cnt = 0;
        while (val) {
            val &= val - 1;
            ++cnt;
        }
        return cnt;
    }
};

Review

本周阅读英文文章:
1、Cybersecurity In Industrial Control Systems: The Evolving Threat Landscape

2、New malware attack turns Elasticsearch databases into DDoS botnet

Technique

用Prometheus和Grafana搭了MariaDB性能监控系统，步骤单独记录在下面的文章中了:
使用Prometheus和Grafana搭建MariaDB性能监控系统

Share

让Ubuntu SSH登录时显示系统信息，如下这样: 

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System information as of Sun Jul 28 11:51:10 CST 2019

System load:  0.25               Processes:            231
Usage of /:   27.8% of 48.96GB   Users logged in:      1
Memory usage: 19%                IP address for ens32: 192.168.0.1
Swap usage:   0%

只需安装landscape-common，系统会依次执行/etc/update-motd.d/内的文件输出到/run/motd.dynamic中: 

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sudo apt install landscape-common

再次登录时，可以在MOTD中看到这些信息啦

参考

https://elkpi.com/topics/ubuntu-ssh-login-show-system-info.html