Linux CAD software covers more ground than most people expect. FreeCAD handles parametric parts and LibreCAD handles 2D drafting. OpenSCAD builds solids from code while SolveSpace and BRL-CAD take constraint-driven and Boolean approaches. This guide compares five free tools by how they model geometry. It also lists current versions and Linux install routes so you
Linux CAD Software: 5 Free Apps Worth Installing in 2027 Read More »
When a file or directory needs different access, the task is to change its permissions without opening it up more than intended. chmod changes the rules that control access to files and directories. I’ll show how to set permissions with a number such as 640 or a letter-based change such as u+x, then check the
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When you want a hostname to resolve to a chosen address on Ubuntu, you can add a local mapping. The hosts file is a plain-text file that associates IP addresses with hostnames for local name resolution. This article walks through editing /etc/hosts to add a hostname mapping. It also shows how to check the lookup
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A report can be long when you only need to check its newest records. The Linux tail command prints the end of a file, with options to start at a chosen line or byte count. I’ll show how to select the part of a file to read and how to follow new log entries. TL;DR:
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A hostname change can leave your Ubuntu computer using an earlier address. Ubuntu’s systemd-resolved service can store DNS answers in a local cache, and resolvectl can clear that cache. I’ll show how to check which resolver is active and flush systemd-resolved’s local cache. TL;DR On Ubuntu using systemd-resolved, run sudo resolvectl flush-caches to clear its
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When a website won’t load or a server stops answering, the first thing to check is whether your computer can reach that machine at all. The ping command checks that by sending small test messages and timing the replies. I’ll show you how to run ping, read what it prints, and what a reply does
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After `touch report.txt`, `wc -c report.txt` can report zero even though the path now exists. I’m curious about the timestamps `touch` assigns as it creates that empty file. A file’s size and its timestamps tell you different things about what happened to it. Let’s look at the timestamp fields `touch` changes. What the touch command
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Hiring panels ask these questions because log triage is daily work. Every command below was verified against GNU grep 3.11, so you can rehearse the exact syntax you will type on the job. Every example below runs against a small log file, so you can reproduce each result in your own terminal in under a
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Docker Engine lets Ubuntu run an application in an isolated container without creating a full virtual machine. This installation uses Docker’s apt repository, then confirms that the daemon can download and run the hello-world image. Before you install Docker Use a supported Ubuntu release and an account that can run sudo. Docker’s post-install steps explain
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In distributed systems, microservices observability is crucial for improved efficiency and effective troubleshooting. Due to their distributed structure, microservices add complexity in contrast to typical monolithic programs, making it challenging to monitor issues and maximize performance. Observability helps developers and operators identify issues and enhance system behavior by giving them insight into the internal state
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