Bash

In this code snippet, I would like to run an application with a URL payload based on date and time. This code will be executed in a specific schedule everyday and I would like to dynamically inject the date and time in the program argument when the program executes. ./json2csv rules.json "ncp" "http://localhost:8080/api/zget?eid=get-ncp-mv-by-starttime-endtime&starttime;=$(date --date='yesterday' +\%Y-\%m-\%d)+00:00:00&endtime;=$(date --date='yesterday' +\%Y-\%m-\%d)+23:59:00&container;=false" > $(echo "nercc_mv_$(date --date='yesterday' +\%Y-\%m-\%d).csv") The way to do this is using the Bash String Manipulation Inside a string, the bash will evaluate statement inside “$()” in this example: ...

Use Linux diff command to compare files line by line. This handy tool helps you identify line differences between files and console output. Command diff -y file1 file1 Marker Meaning | = line present in both files but the text differs. < = line present only in the left file. > = line present only in the right file. Examples Comparing two package.json files johnpili@com ~ % diff -y package1.json package2.json { { "name": "date-diff", | "name": "time-zones", "version": "0.0.0", "version": "0.0.0", "scripts": { "scripts": { "ng": "ng", "ng": "ng", "start": "ng serve", "start": "ng serve", "build": "ng build --base-href /tools/date-diff/ --config | "build": "ng build", "watch": "ng build --watch --configuration development", "watch": "ng build --watch --configuration development", "test": "ng test" "test": "ng test" }, }, "private": true, "private": true, "dependencies": { "dependencies": { "@angular/common": "^19.2.0", "@angular/common": "^19.2.0", "@angular/compiler": "^19.2.0", "@angular/compiler": "^19.2.0", "@angular/core": "^19.2.0", "@angular/core": "^19.2.0", "@angular/forms": "^19.2.0", "@angular/forms": "^19.2.0", "@angular/platform-browser": "^19.2.0", "@angular/platform-browser": "^19.2.0", "@angular/platform-browser-dynamic": "^19.2.0", "@angular/platform-browser-dynamic": "^19.2.0", "@angular/router": "^19.2.0", "@angular/router": "^19.2.0", "@tailwindcss/postcss": "^4.1.4", "@tailwindcss/postcss": "^4.1.4", "daisyui": "^5.0.28", "daisyui": "^5.0.28", "moment": "^2.30.1", | "moment-timezone": "^0.5.48", "postcss": "^8.5.3", "postcss": "^8.5.3", "rxjs": "~7.8.0", "rxjs": "~7.8.0", "tailwindcss": "^4.1.4", "tailwindcss": "^4.1.4", "tslib": "^2.3.0", "tslib": "^2.3.0", "zone.js": "~0.15.0" "zone.js": "~0.15.0" }, }, "devDependencies": { "devDependencies": { "@angular-devkit/build-angular": "^19.2.8", "@angular-devkit/build-angular": "^19.2.8", "@angular/cli": "^19.2.8", "@angular/cli": "^19.2.8", "@angular/compiler-cli": "^19.2.0", "@angular/compiler-cli": "^19.2.0", "@types/jasmine": "~5.1.0", "@types/jasmine": "~5.1.0", "jasmine-core": "~5.6.0", "jasmine-core": "~5.6.0", "karma": "~6.4.0", "karma": "~6.4.0", "karma-chrome-launcher": "~3.2.0", "karma-chrome-launcher": "~3.2.0", "karma-coverage": "~2.2.0", "karma-coverage": "~2.2.0", "karma-jasmine": "~5.1.0", "karma-jasmine": "~5.1.0", "karma-jasmine-html-reporter": "~2.1.0", "karma-jasmine-html-reporter": "~2.1.0", "typescript": "~5.7.2" "typescript": "~5.7.2" } } } } johnpili@com ~ % The example below shows how to use diff to compare installed PHP modules. This is very useful when you’re switching to a different version of PHP ...

Delete files with specified file extension recursively. This is useful when you want to remove those temporary files or those unwanted auto-generated artifacts inside nested folders. Be careful when using these commands because it will delete files permanently Linux Bash find . -type f -name "*.tmp" -delete find . -type f -name "*.tmp" -exec rm -v "{}" + Windows Powershell Get-ChildItem * -Include *.tmp -Recurse | Remove-Item

In this post I will share how I use Cloudflare as Dynamic DNS. I was previously using dynamic DNS service from No-IP for three years until a colleague of mine mentioned Cloudflare’s really fast global DNS. Initially, I thought that Cloudflare was just a CDN and an Internet company that protects websites from Distributed Denial-of-Service (DDoS) attack, upon further research I found out that Cloudflare also provides a DNS service with a REST-API for you to update your DNS records. ...