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Bash Script Locking: Prevent Concurrent Runs with a PID File

Bash Script Locking: Prevent Concurrent Runs with a PID File

Quick Tip Wrap any script that must not run twice at once in a PID-file lock, and a second copy simply exits instead of corrupting your data. The Problem The Problem Cron does not c

#Bash#Pid file#Locking+3 tags
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Bash Retry Function: Automatically Retry Failing Commands with Exponential Backoff

Bash Retry Function: Automatically Retry Failing Commands with Exponential Backoff

Quick Tip Wrap any flaky command in one reusable retry function and stop re-running red pipelines by hand. The Problem The Problem Some commands fail for reasons that have nothing to

#Bash#Retry#Exponential Backoff+3 tags
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Why printf Beats echo in Linux Scripts

Why printf Beats echo in Linux Scripts

Scripting Tip A script that works on your machine can produce different output on another system. The output command is often the reason. printf behaves the same way across shells, and echo d

#Bash#Shell Scripting#Printf+5 tags
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Essential Bash Variables for Every Script

Essential Bash Variables for Every Script

Overview Quick Tip You know what's worse than writing scripts? Writing scripts that break every time you move them to a different machine. Built-in Bash variables fix that. The problem wi

#Bash#Shell Scripting#Linux+4 tags
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Per-App Shell History for Bash

Per-App Shell History for Bash

Organize your Bash history per terminal app. Ever jumped between iTerm2, Ghostty, and VS Code's terminal only to have your command history get all mixed up? This Bash snippet keeps things clean b

#Bash#Shell Scripting#Productivity+3 tags
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Check S3 Bucket Existence

Check S3 Bucket Existence

Quick Tip Don't let your deployment blow up because of a missing S3 bucket. This Bash script lets you check if a bucket exists before anything fails. The Problem Missing bucket failure

#Bash#AWS#DevOps+3 tags
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