Perl File Test Operators Explained for DevOps Automation
Perl’s built-in file test operators let you check existence, type, size, permissions, and ownership without external commands. This guide explains the operators, real vs effective ID checks, and production-friendly patterns for automation scripts.
Reading XML in Shell Scripts: Safer Patterns with xmlstarlet and xmllint
Need to extract values from an XML file in a shell script? This revised guide explains the classic grep/sed approach, its limits, and safer XPath-based alternatives for production automation.
How to Create a Unique SRCSAFE.INI in Visual SourceSafe
For legacy Visual SourceSafe environments, a unique SRCSAFE.INI helps you apply client-specific settings without changing the shared defaults. This guide walks through the file setup, optional #INCLUDE usage, and SSDIR configuration.
File Comparison Tools for DevOps: Revised Review of Beyond Compare, WinMerge, Diffutils, and More
File comparison is core to safe change management in DevOps, from reviewing config drift to resolving merge conflicts. This revised review summarizes the original tool list with a practical workflow, side-by-side comparisons, and command examples.
How to Login to a Perforce Server Using the Command Line and Batch File in Windows
1. Introduction Perforce (Helix Core) provides a command-line tool called p4.exe for interacting with the Perforce version control system. To access the server, users must log in…
Top 50 Apache spark interview questions and answers
Q1. What is RDD? Ans. RDD (Resilient Distribution Datasets) is a fault-tolerant collection of operational elements that run parallel. The partitioned data in RDD is immutable and…
Top 50 Nginx Interview questions and answers
1) What is Nginx? Nginx is a type of an open source web server which is especially used for reverse proxy, load balancer, mail proxy and for…
Top 100 Ruby Programming interview questions and answers.
1) What is Ruby programming language? Ruby is a dynamic, reflective, open source programming language that aims on simplicity and productivity.Ruby has a blended functions of Perl,…
Check if File Exists
msiexpert created the topic: Check if File Exists Using CreateInstall 4. How can I check if a file exists at Program Folders\MySetup\Myprogram.exe? applicationPackaging replied the topic: Re:…