Managing Claude Code, Codex, and Gemini CLI with Homebrew and mise

To simplify setup across multiple Macs, I migrated Codex CLI and Gemini CLI to Homebrew and Claude Code to mise's install script.

Giving AI Coding CLIs Full Permission to Run Autonomously - Claude Code, Codex, and Gemini CLI Compared

To let AI coding CLIs run autonomously, you need to configure their permission settings. Claude Code has --dangerously-skip-permissions and auto mode. Codex CLI has --full-auto and --yolo. Gemini CLI has --approval-mode yolo. This post compares the three tools' permission models and explains which mode to use in which situation.

How to check the API Version currently used in Amazon CloudFront

Aggregating CloudTrail event history JSON with jq to see which CloudFront API versions my account still used.

Sample code to log into Amazon Cognito and get Access Token [CLI curl edition]

A curl + jq CLI snippet for logging into Amazon Cognito and extracting the Access Token.

Batch Output Amazon Receipts with 'Amazon Order History Filter' and Split with pdfseparate Command

Batch-export Amazon receipts with the Amazon Order History Filter extension and split the PDF with pdfseparate.

[Android] How to Install APK Files on an Emulator

Installing an APK onto a running Android emulator with the `adb install` command.

[Android] Command to Check the Contents of a Keystore File

A note on inspecting an Android keystore file's aliases and certificate fingerprints with the keytool command.

How to set environment variables PATH and JAVA_HOME to use Android Studio's JDK in Terminal

Set PATH and JAVA_HOME to reuse Android Studio's bundled JDK from Terminal on macOS.

avn: Automatically Switch Node.js Versions

Set up avn to automatically switch Node.js versions from a .node-version file when you cd into a project.

How to register and use multiple AWS accounts with AWS CLI

Register multiple AWS accounts with `aws configure --profile` and switch between them via --profile.

AWS CLI Commands for Bulk Uploading Files to S3

`aws s3 cp` / `sync` commands for bulk-uploading files to S3, with --include / --exclude and --dryrun tips.

[AWS] aws s3 sync ./upload_dir s3://xxx --region ap-northeast-1

Fixing the `aws s3 sync` PermanentRedirect error by passing --region for the bucket's region.

Accelerating Prototyping with AI Coding Tools Using AWS Copilot CLI

Deploy AI-generated applications to ECS/Fargate quickly with AWS Copilot CLI. This article explains why this workflow is so effective for prototyping.

AWS Copilot CLI End-of-Support and Future Alternatives

AWS Copilot CLI's end-of-support is underway. Here's a summary of the confusing official announcements and the migration options being discussed in the community.

AWS ECS Exec Sample Script for /bin/sh Login

A sample script for one-shot /bin/sh login into a running ECS task container via AWS ECS Exec.

Deploying to AWS Lambda with Serverless Framework

Installing Serverless Framework and deploying to AWS Lambda using the aws-nodejs template.

AWS Session Manager Plugin Installation Method [macOS Monterey 12.4 Edition]

Working install steps for the AWS Session Manager plugin on macOS Monterey 12.4.

From curl to the Backlog CLI 'bee' — Making AI Agent Integration One Step Easier

Last time I wrote about issuing a Backlog API key so AI agents (Claude Code, Codex, Hermes Agent) could call the REST API with curl. This post drops that raw-curl setup and replaces it with bee, the Backlog CLI built by Nulab volunteers. Think of it as the gh of Backlog.

[Bash] Shell Script to List URLs That Return HTTP Status Code 200

A Bash snippet using curl and a for loop to list only URLs that return HTTP 200.

[Mac] Fixing 'Error: /usr/local must be writable!' with brew update

Notes on recovering from brew update's /usr/local must be writable! error via chown and brew prune.

Managing Multiple Bun Versions with asdf

Notes on managing multiple Bun versions with the asdf-bun plugin on M1 macOS.

[CentOS] Commands to Check Version and 32bit/64bit Architecture

Commands to check the CentOS release version and 32bit/64bit architecture.

CLI Agent License Comparison and Commercial Use Guide - Claude Code, Codex, Gemini CLI

License investigation results for embedding CLI Agents into your product. Explains the differences between Claude Code (proprietary) and Codex/Gemini CLI (Apache 2.0), along with commercial use considerations.

Codex CLI Zombie Processes Consuming CPU and Temporary Fix with pkill

A mysterious CPU spike on my dev machine... the culprit was zombified Codex CLI. Here's a quick and dirty workaround using pkill in cron until a proper fix is available.

Command to Convert Line Endings from CR+LF (Windows) to LF (Linux) [Linux, macOS Edition]

Batch convert CR+LF line endings to LF on Linux/macOS with a one-liner using the tr command.

Make life easier with cron format checking services

Two web services that make cron expressions easier: crontab.guru for English and Cron Builder for Japanese GUI users.

[crontab] Solution for * is not found error

Troubleshooting notes on why cron scripts hit '* is not found' - the fix is setting PATH inside crontab.

crontab Day-of-Week Specification Can Use English Abbreviations Like SUN-SAT in Addition to Numbers 1-7

A note that crontab's day-of-week field accepts SUN-SAT in addition to 1-7, with a field reference table.

How to Write crontab Considering Daylight Saving Time PST/PDT

A crontab notation example that accounts for PST/PDT daylight saving time shifts.

How to write shell scripts that execute batch jobs with crontab only at month-end

Use the test command to check if tomorrow is the 1st, so cron fires only on the actual month-end day.

Checking HTTP/1.1, HTTP/2 with curl --head --verbose Command

How to use curl --head --verbose to confirm whether a URL responds over HTTP/1.1 or HTTP/2, with sample output.

[cURL] GET/POST/PUT/DELETE

A short memo on using cURL's -X option to send GET / POST / PUT / DELETE requests.

[curl] Options for Sending RESTful Requests

A memo of reference links summarizing curl options for sending RESTful requests.

How to Save Cookies and Maintain Sessions with cURL

How to keep a login session alive with curl by saving cookies with -c and reusing them with -b.

How to specify TLS version with cURL

How to probe TLS 1.0 / 1.1 / 1.2 support individually using cURL's --tlsv1.x options.

Specify UserAgent with curl command

How to set the User-Agent header with curl's -H option, using the Facebook crawler as an example.

How to Install dbt CLI [macOS Edition]

Installing dbt CLI on macOS via Homebrew and checking the version.

Dropbox CLI dbxcli Installation and Initial Setup [macOS Edition]

Installing dbxcli on macOS via Homebrew, logging in, and trying uploads from the CLI.

PDF File Difference Checking Tool: diff-pdf

Installing diff-pdf and using --view to visually compare two PDFs on macOS.

[Linux] Checking name servers with the dig command

Using `dig <domain> NS` to look up the name servers for a specific domain.

How to Manage Environment Variables with direnv

A walkthrough of managing per-directory environment variables with direnv, from install to direnv allow.

docker rmi Command to Delete Docker Images

How to delete Docker Images with docker rmi and reclaim disk space, including dangling image cleanup.

How to Bulk Delete Unused Docker Images, Containers, Volumes, Networks, and Cache

How to reclaim disk space with docker system prune and per-resource prune subcommands.

[DotCloud] How to Transfer Files to Web/DB Server

A short memo on transferring files to DotCloud Web/DB servers using scp.

Notes for learning dotinstall's "Introduction to UNIX Commands (General User Edition)" on Mac

Notes on which lessons of dotinstall's UNIX Commands course to skip on Mac and which to work through.

How to Investigate Amazon ECS Task Stop Reason 'Essential container in task exited'

How to investigate ECS tasks stopped with 'Essential container in task exited' via the Console and AWS CLI.

Checking Elasticsearch Index List

curl one-liners to list Elasticsearch indexes and to delete a specific index by name.

How to Search and Delete Specific Documents in Elasticsearch [curl Edition]

curl examples for searching and deleting specific documents in Elasticsearch 7.10 via the _search and _delete_by_query APIs.

How to change PDF title with exiftool on CLI

How to rewrite a PDF's Title metadata from the CLI using exiftool.

Converting .mov to .gif with FFmpeg [macOS Edition]

Convert a .mov to a scaled 12fps .gif on macOS using FFmpeg for uploading to GitHub issues.

Converting MOV to MP4 with Resizing Using FFmpeg

A one-line FFmpeg command to convert .mov to .mp4 while resizing to 1280x720.

Converting mp3 to mp4 using FFmpeg to upload audio files to YouTube [macOS Edition]

Combine an mp3 and a jpg into an mp4 with FFmpeg on macOS for uploading audio to YouTube.

Enable CLI and Terminal auto-completion with Fig

Install Fig via Homebrew on macOS to add IDE-style autocompletion to your Terminal.

How to find Android apk files using the find command

A quick find one-liner to locate Android .apk files built with gradlew.

Completely Delete and Make Private Sites Published on Firebase Hosting

Take a Firebase Hosting site offline with firebase hosting:disable while keeping the project intact.

fish shell Installation Steps [macOS Edition]

Installing fish shell on macOS via Homebrew and switching the login shell to fish.

fish shell Uninstallation Steps [macOS Edition]

Switching my macOS login shell back to zsh and uninstalling fish shell after hitting nvm compatibility issues.

Gemini CLI May Automatically Merge Your PR When You Ask It to Review

AI code review can boost development efficiency, but some tools may behave unexpectedly. I'll share my experience of breaking into a cold sweat when Gemini CLI executed Approve and Merge all at once after I asked it to review a PR. This is a safety warning for using AI effectively.

Why the Gemini CLI Security Extension Impressed Me

I tried the Gemini CLI Security extension and it turned out to be impressively capable. While I've been using Claude Code and Codex with their defaults, I now want to actively leverage Gemini CLI extensions as well.

Creating GitHub Projects Draft Issues from CLI with gh projects item-create

How to create draft issues in GitHub Projects from the CLI using the gh projects item-create command.

How to set animated GIFs to loop playback

Using gifsicle's --loopcount and --batch options to configure loop playback for animated GIFs.

How to Change File Names and Directory Names Case in Git

How to change the case of file and directory names in Git using git mv.

[Git] How to Set Files to Ignore in All Git Repositories Using Global .gitignore

How to configure `core.excludesfile` so a single `.gitignore` applies to every Git repository.

git log -S can search for code deleted in the past

How to use `git log -S` to find commits that added or removed a specific piece of code.

[Git] How to enable --no-ff (no fast-forward) by default

How to enable `git merge --no-ff` by default using an alias or `mergeoptions` config.

[Git] How to change case of file names and directory names

Use `git mv -f` when you only want to change the case of a file or directory name in Git.

[Git] Command to return to pre-merge state when conflict occurs during merge

The one-liner `git reset --hard ORIG_HEAD` to return to the pre-merge state after a conflict.

[Git] How to Restore Deleted Files

Three-step recipe using `git rev-list` and `git checkout` to restore a deleted file from Git history.

[Git] How to revert a merge commit

How to revert a merge commit with `git revert -m 1`, plus the errors you hit without it.

Steps to revert when git stash pop results in conflict

Three commands to revert when `git stash pop` runs into a conflict.

[Git] How to Undo When You Accidentally Execute git push origin master

Safely undo an accidental `git push origin master` with `git revert` instead of force push.

Creating GitHub Issues from CLI with gh issue create

Use gh issue create to bulk-create GitHub issues from the CLI, with a sample script covering labels and assignees.

[GitHub] Making PullRequests Easier with the hub Command

Use the hub CLI to send GitHub Pull Requests from the command line instead of a browser.

[Github] Error creating pull request: Not Allowed (HTTP 405)

Fixing hub pull-request's HTTP 405 Not Allowed error by removing ~/.ssh/known_hosts.

Go language version management tool gvm installation [macOS Edition]

Installing gvm on macOS and switching between specific golang versions.

Heroku App Restart, Stop, Start Commands

Quick reference for restarting, stopping, and starting a Heroku app from the CLI.

How to transfer Heroku app owner permissions to another account

CLI steps for transferring Heroku app ownership, with a Pipeline caveat.

[Heroku] Migrating to cedar-14 Stack

Migrating a Heroku app to the cedar-14 stack with heroku stack:set and an empty git commit.

How to Update Heroku Command (heroku-cli) to the Latest Version

Updating heroku-cli to the latest version with Homebrew on macOS to silence the update available notice.

Upgrading Heroku Command Version

Upgrading heroku-toolbelt to Heroku Toolbelt v4 with heroku update after stack:set was unavailable.

[Heroku] Logging Add-on to Check Logs

Adding Heroku's Logging add-on and tailing logs with heroku logs --tail.

[Heroku] Log Management Add-on Papertrail

Adding the Papertrail add-on on Heroku and opening its docs and dashboard from the CLI.

Heroku PostgreSQL Version Check Method and Command: heroku pg:info

Use heroku pg:info to confirm the version of Heroku PostgreSQL your app is running.

How to Update and Upgrade Homebrew

The difference between brew update and brew upgrade, and how to use each command.

HTTrack - Tool for Saving Entire Websites - macOS Edition

How to install HTTrack on macOS via Homebrew and mirror a whole website for offline browsing.

After upgrading to Mac OS X El Capitan, hub command stopped working, but 'brew upgrade hub' fixed it

The hub command broke with ArgumentError after upgrading to El Capitan, and 'brew upgrade hub' fixed it.

Use the -c option to exclude invalid characters that iconv cannot convert

Use iconv's -c option to skip invalid characters and finish a UTF-8 to Shift JIS conversion.

ImageMagick Sample Code for Converting Images to @2x, @3x, @4x Sizes

Sample code that uses ImageMagick's convert to emit @2x, @3x, and @4x variants of an image.

How to Use ImageMagick's mogrify Command for Batch Image Size Conversion

How to batch-resize images with ImageMagick's mogrify command, with a few common examples.

Batch Remove Exif from JPEG and PNG with ImageMagick

How to batch-remove Exif from JPEG and PNG files using ImageMagick's mogrify -strip command.

instagram-scraper: A Python Tool for Downloading Instagram Images and Videos

How to install and use the Python CLI tool instagram-scraper to download Instagram images and videos.

How to Install Google Cloud SDK [macOS Edition]

Move the Google Cloud SDK tarball to your home directory, extract it, and run install.sh and gcloud init.

Installing iftop on Mac

After brew install iftop, the binary wasn't on PATH, so I symlinked it into /usr/local/bin/.

[Mac] Steps to install ionice command

Download ionice.c from GitHub, build it with gcc, and install it into /usr/local/bin/ to use ionice on Mac.

Installing the Latest Version of Vim on CentOS5.7

Uninstall the yum Vim on CentOS 5.7, clone the latest source with mercurial, and build it from source.

[Git] Installation Steps for CUI Tool tig

brew install tig to get the Git CUI browser tig set up on Mac quickly.

How to check Ionic Framework version

How to check the Ionic Framework main and CLI versions with npm info, ionic --version, and package.json.

How to launch iOS apps in simulator with Ionic Framework

Build with ionic cordova build ios, open the .xcodeproj in Xcode, and run the app in the iOS Simulator.

Getting started with ionic start

The options I chose when creating an Ionic Framework project with ionic start — starter, Cordova, and Ionic Pro SDK.

Getting Currently Connected Network/Wi-Fi IP Address with ipconfig Command on Linux

Grab only the connected IP address on macOS with ipconfig getifaddr en0.

[iTerm] How to Set Window Background Transparency

Enable a translucent iTerm window from Preferences → Profiles → Window → Transparency.

Lossless compression of JPEG images with Jpegoptim

Losslessly compress JPEGs on macOS with Jpegoptim from Homebrew, plus a one-liner for batching a whole directory.

jpegtran Command to Remove Metadata from jpeg and jpg Image Files

Strip Exif metadata from JPEGs with jpegtran on macOS, plus a find + -exec one-liner to batch a directory.

[Linux] How to Auto-execute Commands or Programs at Login

Configuring .bash_profile on CentOS to run proxy setup and ntpdate at login.

[Linux] Commands to check CPU core count

How to check CPU core count and processor details on Linux with nproc, getconf, and /proc/cpuinfo.

[Linux] Command to Check Number of Files Under Specified Directory

A quick note on counting files under a directory recursively with find and wc -l on Linux.

[Linux] Copy Directory with cp -a Command

Use cp -a to copy a directory recursively while preserving its structure on Linux.

[Linux] Command to Check Directories with High Disk Usage

Combine du and sort to find the top directories eating disk space on Linux when hit with a disk full warning.

[Linux] Commands to Get File Hash Values

Compute file hashes on Linux with openssl sha1 for SHA-1 and md5sum -b for MD5.

[Linux] Command to Delete Old Files by Specifying Date and Time

Use find with -mtime / -atime and xargs rm to bulk delete old files on Linux when freeing up disk space.

[Linux] How to Configure Character Encoding (UTF-8, EUC, SJIS)

How to set LANG on Linux for Japanese EUC, UTF-8, and SJIS character encodings.

[Linux/macOS] Batch Compress Files to .gz with gzip Command

Use gzip * to batch compress log files and free up disk space when hit with a sudden disk full incident.

[Linux] Using mktemp Command is Safe for Creating tmp Files

Use mktemp with mv or ln to safely create temporary files on Linux, and gmktemp on macOS for the same behavior.

[Linux] Check Domain TXT Records with nslookup -q=txt Command

Use nslookup -q=txt to look up a domain's TXT records, including SPF.

[Linux] How to Auto-Execute Commands or Programs at Startup

Edit /etc/rc.d/rc.local to auto-run commands at CentOS startup, such as proxy setup and ntpdate time sync.

[Linux] Batch Change File Name Endings with rename Command

Use the Linux rename command with a regex to batch change file name endings.

Article That Clearly Explains the Differences and Usage Between rpm and yum

External references explaining the differences and usage between rpm and yum for Linux package management.

[Linux] Remove Duplicate Lines by Piping sort and uniq

Pipe sort into uniq to strip duplicate lines from a text file in one line.

[Linux] Command to split CSV, text files, etc. by specified number of lines

Use split to break a CSV into 100-line chunks, then restore the .csv extension with a short for loop.

[Linux] For deleting tab characters and spaces, tr command with -d option is simple and recommended

Use tr -d to strip tabs and spaces on Linux or macOS, plus a quick reference for tr's main options.

[Linux] who Command to Display Currently Logged-in Users

Use who --heading --users to inspect logged-in users, and cross-check stale ssh sessions with the w command.

[Linux] How to Create Password-Protected ZIP Compressed Files

Use zip -er to build a password-protected archive from the command line on Linux or macOS.

[Lokka] How to Deploy and Run on Heroku

Steps to deploy the Ruby CMS Lokka on Heroku and use it as an English learning blog.

[Mac] How to Configure ll Command to Execute ls -l Command

Adding an alias in `.bashrc` so `ll` works as `ls -l` on Mac.

[Mac] Essential Homebrew Packages to Install

A 2013 list of essential Homebrew packages to install on Mac.

[Mac] Installing nkf with Homebrew

Installing the nkf character encoding converter on macOS with brew install nkf.

[Mac] Installing tree Command with Homebrew

Installing the tree command on macOS via Homebrew to visualize directory structures.

[Mac][Lion] How to check kernel bit count and switch between 32/64bit

Checking the kernel bit count on Mac OS X Lion and switching between 32-bit and 64-bit.

[Mac] Command to check processes using a specific port: lsof -i

Using lsof -i on macOS to find the process listening on a specific port.

[Mac] Solution for 'You do not have permission to open document xxx'

Fixing the 'You do not have permission to open document' error on Mac by batch-updating permissions with `chmod -R`.

[Mac] How to Install wget

Installing wget on a Mac quickly via Homebrew.

[Mac] zsh Installation Steps and Configuration Memo

Switching the default Mac shell from bash to zsh via Homebrew, then configuring oh-my-zsh.

[macOS] How to Configure Finder to Show Hidden Files (Dot Files)

How to toggle hidden files (dot files) in macOS Finder with defaults write and killall Finder.

[macOS] Installing Homebrew (and Git While We're at It)

Installing Homebrew on macOS, verifying with brew doctor, and then installing Git through the package manager.

How to Install Vim on Mac OS X Lion with Homebrew

Reinstalling Vim with +ruby on Mac OS X Lion via Homebrew, working around a libruby link error by switching to Ruby 1.8.7.

How to Uninstall MacPorts

Uninstalling MacPorts with sudo port -fp uninstall and cleaning up /opt/local and related directories.

Converting Markdown Slides to PDF with marp-cli

Converting Markdown slides to PDF with npx @marp-team/marp-cli when Marp for VS Code won't export.

mesh.js - extending MongoDB shell to use moment.js, underscore.js and other useful libraries

Extending the MongoDB shell with mesh.js so moment.js and underscore.js are available, with a date-arithmetic example.

[MongoDB] Display Count in mongo shell Can Be Set with DBQuery.shellBatchSize

Change the mongo shell page size with DBQuery.shellBatchSize to skip typing "it" over and over.

[MongoDB] How to Check Execution Time of aggregate

Measuring MongoDB aggregate execution time by wrapping mongo --eval with the shell's time command.

[MongoDB] How to execute queries from Terminal with arguments

Passing arguments into a MongoDB query file from the Terminal using the mongo shell's --eval option.

[MongoDB] Outputting field values containing line breaks in a format that can be imported by Google Spreadsheets

Exporting MongoDB fields with line breaks as CSV that Google Sheets can import out of the box.

[MongoDB] How to output query results to standard output and save to file

Piping MongoDB query results straight into a file with mongo --quiet and shell redirection.

[MongoDB] Connecting to Another DB from mongo shell to Execute Queries

Open a second connection with connect() and reach another MongoDB server from the same shell.

Use printjson() to output Objects in MongoDB shell

Use printjson() instead of print() to inspect Object values inside the MongoDB shell.

Resolve Japanese character corruption in MySQL CLI with SET character_set_results=utf8mb4;

Fixing Japanese mojibake in the MySQL CLI with SET character_set_results=utf8mb4;.

[MySQL] Execute Queries from Command Line and Output to CSV File

Piping mysql -e output through sed to save query results as a CSV file.

[Nginx] How to Check Compile Options

Use nginx -V to inspect the configure arguments and enabled modules of an installed Nginx binary.

[Node.js] Module 'commander.js' for Easy Command Line Argument Handling

A quick pointer to commander.js, a handy Node.js module for CLI argument handling.

Prototype Development of a PDF to Text Extraction and Image Conversion CLI Tool with Node.js and WASM Libraries

I want to extract text and images from PDFs for use in vectorization for RAG. With this background, I developed a prototype CLI tool that's easy to use with Node.js. The key point is leveraging WebAssembly (Wasm) for use in serverless environments. This article introduces the background of our technology selection and an overview of the implementation.

Distribute an npm CLI Privately via Cloud Storage — A Self-Contained Zip Recipe with Google Drive

A registry is overkill, but handing over the source feels wrong. In that gap sits a humble option: pack your npm CLI into a single self-contained zip and share it through a Google Drive link. Bundle the npm tarball with an INSTALL.md, share it via link or email restriction, and let a human fetch it from a browser and install it. Assembled here as a recipe that actually runs.

Shipping an npm CLI Tool Securely to a Specific Customer — Designing the Build, Sign, and Deliver Pipeline

You want a privately developed npm CLI tool used only inside one customer enterprise, never on the public npm registry. It looks like plain packaging, but in practice you must satisfy three things at once: passing the OS security gates (Gatekeeper and SmartScreen), tamper-evident signing, and a distribution network you can control and audit per customer. Targeting macOS and Windows now with Linux ahead, this post designs build, signing, distribution, and supply-chain hardening as a single pipeline.

How to Use OAuth 2.0 in CLI and Batch Processing

A collection of references for using OAuth 2.0 from CLI tools and batch processing.

[Zsh] oh-my-zsh Installation and Configuration Method

Installing oh-my-zsh, enabling plugins and custom configs, and dodging the PATH pitfall.

Solution for oh-my-zsh 'The `osx` plugin is deprecated and has been renamed to `macos`'

Fixing the oh-my-zsh warning about the deprecated osx plugin by renaming it to macos in .zshrc.

[LDAP] How to Change Password for Registered Entries (ldappasswd Command)

A quick note on changing an LDAP entry password with the ldappasswd command.

[OpenSSL] How to Create Self-Signed Certificates (Ore-ore Certificates)

Three openssl commands to generate a private key, a CSR, and a self-signed certificate.

Lossless compression of PNG images with OptiPNG

Using OptiPNG on macOS to losslessly compress PNGs, individually or in a batch.

[Parse.com] How to Send Push Notifications with REST API

curl commands for sending push notifications through the Parse.com REST API, grouped by use case.

[Android][iOS] Push Notifications via REST API with Parse.com

A curl command example for pushing notifications to Android and iOS apps via the Parse.com REST API.

pdftoppm Command for Batch Converting PDF to Image Files on macOS

Batch converting PDF files to jpeg or png on macOS with pdftoppm, plus installing poppler via Homebrew.

[PHP] How to Check Options Specified for ./configure

A short note on checking PHP's ./configure options via config.nice and php -i.

[PHP] How to Check the Output Directory of error_log

Use php -i and grep to find where PHP writes its error_log.

[PHP] How to Execute phpinfo() from Command Line

How to run phpinfo() straight from the Linux command line using php -r 'phpinfo();'.

[PostgreSQL] How to Output Tables to CSV

Two ways to export a PostgreSQL table to CSV: interactive psql commands and a one-liner `psql -c` invocation.

Switched prezto theme from pure to cloud after pure was removed

Switching prezto's prompt theme from pure to cloud after pure was dropped from the bundled themes.

Zsh Framework prezto Installation and Configuration

Installing prezto and setting the pure theme plus useful modules in `~/.zpreztorc`.

[macOS] Random String Generation Command for Passwords: pwgen

Installing and using pwgen on macOS to generate random password strings, including symbol characters.

[Python] How to Run Programs from Mac Terminal

Running a Python script from the macOS terminal by cd'ing to its directory and typing `python test.py`.

How to Easily Start a Web Server with macOS + Python

Quickly serving files from macOS with `python3 -m http.server 8000` (or the python2 equivalent).

Remove Password from PDF Files with qpdf Command

Remove passwords and print restrictions from PDFs from the CLI using the open-source qpdf command.

QR Code Generation Command: qrencode

Install the qrencode command and generate QR codes safely from the CLI on CentOS, macOS, or Ubuntu.

[Redis] Command to get all values of keys containing a specific string

A one-liner combining redis-cli KEYS and MGET via xargs to fetch all values for keys matching a prefix.

[RVM] How to Uninstall Ruby Version Management System RVM

You can uninstall RVM by simply running `rvm implode` or `rvm seppuku`.

[RVM] How to Update Ruby version

Update RVM with `rvm get latest`, then bump your Ruby version with `rvm upgrade`.

The sass-convert Command for Converting CSS to Sass (Scss) is Convenient

Use the `sass-convert` command that ships with the sass gem to convert CSS to Sass / Scss.

Common Patterns for Using screen

Common screen command patterns for running long batch jobs over SSH — start, detach, re-attach.

How to overwrite and save files with sed command

Two ways to overwrite a file in place with the sed command — the -i option and a redirect + cp pattern.

Points to check when configuration file specified in Serposcope's Dserposcope.conf is not loaded

Serposcope ignored `-Dserposcope.conf` because I had the `java` command options in the wrong order.

How to delete all services deployed with Serverless Framework

Cleaning up leftovers from `serverless remove` — deleting the S3 Bucket, DynamoDB Table, and CloudFormation stack from the AWS Console.

[Shell Script] Commands to Get CPU Core Count

Getting the CPU core count on Linux by grepping `processor` in `/proc/cpuinfo`.

[Linux] Sample Code to Retry Shell Commands Until Success

A `/bin/sh` snippet that retries a command with back-off until it succeeds.

[Shell Script] /bin/bash^M: bad interpreter: No such file or directory

`/bin/bash^M: bad interpreter` comes from CR/LF line endings — convert the script to LF to fix it.

Shell Script to Open GitHub Issues Updated in the Last n Hours in Browser

A shell script that queries `gh issue list` and batch-opens recently updated GitHub issues in the macOS browser.

How to Install Shopify CLI and Theme on macOS

Install Shopify CLI and @shopify/theme on macOS via asdf-managed Node.js and npm, skipping Homebrew.

[Mac] How to Configure Sublime Text for Command Line Use

Enabling the subl command on macOS by symlinking Sublime Text's helper into /usr/local/bin.

[Mac] terminal-notifier is convenient for notifying when Terminal commands complete!

How to install and use terminal-notifier to get Mac notifications when long Terminal commands finish.

Terraform REPL Feature Available with terraform console

Use `terraform console` as a REPL to interactively evaluate Terraform expressions like the `regex` function.

Download Twitter Spaces Audio Files with twspace-dl

Installing and running the Python CLI twspace-dl on macOS to download Twitter Spaces audio.

[Ubuntu] How to Install aptitude [11.10]

Installing aptitude on Ubuntu 11.10 via sudo apt-get -y install aptitude.

[Ubuntu] Solution for 'sudo: add-apt-repository: command not found' Error

Fixing 'add-apt-repository: command not found' on Ubuntu by installing software-properties-common.

Commands to Check, Add, and Remove UTF-8 BOM <U+FEFF> [Linux, macOS Edition]

Using the file and nkf commands to check, add, and remove the UTF-8 BOM on Linux and macOS.

[Vim] .vimrc Configuration Memo

A memo of the basic options I added to .vimrc when getting started with Vim.

Renaming virtualenvwrapper environment names

Renaming a virtualenvwrapper environment by combining cpvirtualenv and rmvirtualenv.

Bulk Download Entire Website with wget Command [Linux]

A sample wget option set to bulk download an entire website as a static backup.

wget no-check-certificate Option for SSL, https Connection

Bypass wget's SSL certificate verification error with the `--no-check-certificate` option.

Automatic Japanese Text Transcription from Audio Files with whisper.cpp

Notes on transcribing audio to Japanese text using whisper.cpp.

[Domain] Japanese correspondence table for registration information in domain Whois

A reference table for matching Japanese and English whois registration fields.

Fixing whois Command Character Corruption with nkf [macOS]

Pipe whois through nkf to fix garbled Japanese output on macOS.

[Windows7] How to Configure Settings to Use the telnet Command

How to enable the telnet command on Windows 7 — a quick reference note.

WordPress files and database automatic backup and upload to Google Drive

Automating WordPress file and MySQL backups to Google Drive with the gdrive CLI and cron.

[Yeoman] You don't seem to have a generator with the name chrome-extension installed.

Fixing Yeoman's missing-generator error on nvm by switching NODE_PATH together with `nvm use` from a .zshrc helper.