DevOps Articles
Deployment pipelines, configuration, and operational best practices.
What Is .htaccess? A Practical Guide for Apache Sites
A per-directory configuration file for Apache: what it can do, where it stops working, and how to avoid the usual mistakes.
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Apache Rewrite Rules Explained: RewriteRule, RewriteCond and Flags
Understand how RewriteRule and RewriteCond fit together, what the flags do, and why per-directory rules behave differently.
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Cron Syntax Explained: A Complete Guide to Cron Expressions
What each cron field means, how ranges and steps are matched, and how to read an expression without guessing.
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Five-Field vs. Six-Field Cron Expressions
The number of fields does not identify a cron dialect. Here is what changes between schedulers and why you cannot just add or drop a field.
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Why Day-of-Month and Day-of-Week Behave Differently in Cron
Why 0 0 13 * 5 is not 'Friday the 13th' in Unix cron, and how Spring, Quartz and EventBridge treat the same fields.
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Cron and Daylight-Saving Time: Skipped and Repeated Runs
A job at 02:30 may not run on the spring-forward day, and a job at 01:30 may match twice in autumn. Here is what to expect and how to plan around it.
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