Author: Willie

Willie has over 15 years of experience in Linux system administration and DevOps. After managing infrastructure for startups and enterprises alike, he founded Command Linux to share the practical knowledge he wished he had when starting out. He oversees content strategy and contributes guides on server management, automation, and security.

Q&A

How To Change Linux User

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Learn what “Linux change user” really means, from switching accounts and running commands as another user to fixing file ownership.
Understand key tasks like reassigning permissions and renaming accounts with the right commands.

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Blog

Secure Coding on Linux — Tools and Habits to Acquire 

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Linux remains the backbone of infrastructure and backend development. It allows for more flexibility and freedom than competing systems, but can’t guarantee security on its own. Consequently, developers need to use the right tools and cultivate a security-first mindset when taking advantage of it. Here are the fundamentals for each. Must-Use Tools Linux has three defining characteristics. It’s open, modular, and set up to support automation well. Since any of these advantages can also become a risk factor, truly secure coding requires a layered approach that covers everything from code vulnerabilities to network exploits. SAST and DAST tools Thorough analysis…

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man page

CMP

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NAME cmp – compare two files byte by byte SYNOPSIS cmp [OPTION]… FILE1 [FILE2 [SKIP1 [SKIP2]]] DESCRIPTION Compare two files byte by byte. The optional SKIP1 and SKIP2 specify the number of bytes to skip at the beginning of each file (zero by default). Mandatory arguments to long options are mandatory for short options too. -b, –print-bytes print differing bytes -i, –ignore-initial=SKIP skip first SKIP bytes of both inputs -i, –ignore-initial=SKIP1:SKIP2 skip first SKIP1 bytes of FILE1 and first SKIP2 bytes of FILE2 -l, –verbose output byte numbers and differing byte values -n, –bytes=LIMIT compare at most…

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