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Standard Python virtual environments hide ROS 2 apt packages from colcon. Use –system-site-packages so pip stays isolated while builds can still import em, catkin_pkg, and friends.
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GRUB splits reading and writing the saved boot entry across GRUB_DEFAULT and GRUB_SAVEDEFAULT. That flexibility helps admins and automation, but it exposes mechanism instead of user intent—and nested configfile menus can silently break remember-last-selection.
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Install ubuntu-realtime on Ubuntu 24.04 with Intel + NVIDIA hybrid graphics: why apt stalls at 2%, why NVIDIA DKMS fails against PREEMPT_RT, how to finish dpkg, and how to restore nvidia-smi on the generic kernel only.
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Use a Nautilus Python extension to put Open in VS Code on right-click for files, folders, and empty folder backgrounds.
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When an agent cannot type a sudo password into a TTY, a short zenity askpass helper unlocks a stable sudo -A workflow.
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How I reclaimed about 2.8 GB from /var/lib/snapd/snaps on Ubuntu 24.04 by removing disabled Snap revisions and unused GNOME platform snaps.
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Shared learning notes for Nise Control Systems Engineering 7th Edition — review questions with my answers and LLM answers side by side.
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How I diagnosed a misleading llvmpipe report on Ubuntu Wayland and fixed the real Xwayland/GLX fallback by updating Xwayland and Xorg core packages.
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Clash Verge TUN mode is useful because it gives you system-wide proxying without configuring every application separately.
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I tried to reduce suspend battery drain on my Dell Latitude 5501 running Ubuntu 24.04.
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BaiduPCS-Go is a command-line Baidu Netdisk client.
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Current LLMs are already useful, but they still have several hard limits.
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Sometimes the Codex extension in VS Code can get stuck even though the Codex CLI still works normally.
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Sometimes the normal Git server is temporarily unavailable, but you still need to move work between two machines on the same local network.
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在中国使用 VFS 签证预约系统时，如果 Cloudflare 验证加载很慢、页面经常卡死或登录被临时锁定，可以先尝试把 DNS 改成 1.1.1.1 和 8.8.8.8。
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Linux 版微信在 Ubuntu 中没有内置的显示/隐藏窗口快捷键，可以用 xdotool 和 GNOME 自定义快捷键实现一个类似的切换功能。
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BLE random device addresses encode their address type in the two most significant bits of the random address.
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How installing the proprietary NVIDIA driver fixed repeated XWayland CPU spikes when launching Electron and Chromium apps on an Ubuntu 24.04 Intel + NVIDIA hybrid laptop.
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macOS 下遇到一个 WeType 的奇怪问题：切换到繁体输入后，再切回简体输入，有些字仍然会按繁体输出，例如 還、總、覆 这类结果会残留在简体模式里。
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I ran into a GitLab outage in a Docker-based deployment where the web UI returned 502 Bad Gateway, even though the container itself was still running and even showed as healthy in docker ps.