Here is my English site.

https://cmdref.net/
cmdref.net is command references/cheat sheets/examples for system engineers.

• Linux Commands Cheat Sheet [cmdref.net - Cheat Sheet and Example]
• RHEL7/CentOS7 vs RHEL6/CentOS6 Differences [cmdref.net - Cheat Sheet and Example]
• Windows Commands Cheat Sheet [cmdref.net - Cheat Sheet and Example]
• F5 BIG-IP CLI Commands [cmdref.net - Cheat Sheet and Example]

https://fasthandle.net/
FastHandle is fast operation tools for infrastructure configurations and tests.

• /etc/cron.d/performance [FastHandle - IT Operations Examples]

https://software.oreda.net/

cmdLauncher is a useful launcher for Microsoft Windows. You can easily access the software, file, folder you registerd.

See here for Japanese site.

Taka@Infrastracture Engineer in Japan

https://takaaki-kurihara.medium.com/

• Efficiently configuration, test, and manage multiple Linux servers with fh command
• Why High-frequency trading Systems use PTP instead of NTP?

https://www.linkedin.com/in/takaaki-kurihara/

• 15+ years of experience in Linux, Windows, Networking, and Storage.
• 15+ years of experience in designing, building and maintaining a highly reliable infrastructure as a financial systems infrastructure engineer
• Experience building infrastructure from nothing at the time of opening of internet securities companies, Internet banks, and domestic and overseas internet FX companies
• Currently responsible for more than 2000 devices (servers, network devices, storage)
• Promoting infrastructure efficiency with Infrastructure as Code
• Good at troubleshooting due to many years of infrastructure experience

See here for Japanese SNS.