The most direct way to check your Zimbra installation version is through the zmcontrol utility: zmcontrol -v This returns the version string of your Zimbra deployment. Run this command on any Zimbra server in your environment — the output will be identical across all nodes in a cluster. Alternative Methods If zmcontrol isn’t available or…
The most straightforward way to convert SVG files to PNG is using ImageMagick or Inkscape. Both are widely available in standard repositories and handle the conversion reliably. Using ImageMagick (convert/magick) ImageMagick provides the magick command (the modern equivalent to the older convert utility): magick input.svg output.png For basic conversions, that’s all you need. To control…
When upgrading libvirt from an older version (like 1.2.2) to 2.5.0 or later, you may encounter a socket connection error when trying to create VMs: ERROR Failed to connect socket to ‘/var/run/libvirt/virtlogd-sock’: No such file or directory Domain installation does not appear to have been successful. This happens because libvirt 2.5.0 introduced the virtlogd daemon…
There are several tools available for extracting images from PDFs on Linux, each with different strengths depending on your use case and the PDF structure. pdfimages (Poppler Utils) The most straightforward approach is using pdfimages from the poppler-utils package: pdfimages document.pdf image This extracts all images and saves them as image-000.ppm, image-001.ppm, etc. By default,…
When running Ubuntu on older servers like Dell PowerEdge systems with legacy graphics cards (Matrox G200eR2, etc.), you may encounter extremely slow desktop performance. The issue typically stems from the X server falling back to unoptimized drivers or incorrect video mode detection. Identifying the problem First, check your current graphics configuration: lspci | grep -i…
The bottom panel in GNOME Classic displays the window list via the “Window List” extension. If you don’t use it, there are several ways to remove it depending on your approach. Method 1: Context menu removal (Recommended) The simplest approach if your GNOME version supports it: Hover over a blank area of the bottom panel…
When you create VMs in KVM, they’re typically assigned IP addresses via DHCP. Finding those addresses so you can SSH in requires a few steps. Here are the practical approaches. Using virsh domiflist and ARP The traditional method combines virsh domiflist to get the VM’s MAC address, then looks it up in the ARP table:…
Ubuntu boots to the graphical desktop by default, but you can change it to boot directly to a text-mode login prompt. This is useful for headless servers, troubleshooting, or resource-constrained systems. The method depends on your init system. Modern Ubuntu uses systemd, but the GRUB approach still works if you need it. Using systemd (recommended)…
The NAS Parallel Benchmarks (NPB) remain a standard tool for evaluating HPC system performance, though landscape has shifted toward additional metrics like HPCG and memory bandwidth tests. This guide covers installation and basic usage. Prerequisites Before installing NPB, you’ll need: Fortran compiler — gfortran is the standard choice on most systems MPI implementation — OpenMPI…
If you’re running Linux Mint and want to install the MATE desktop environment, you’ll need to use the appropriate metapackage for your distribution. Using apt The standard approach for most Linux Mint versions is to install the mint-meta-mate metapackage: sudo apt install mint-meta-mate Note that aptitude is largely obsolete in modern Linux distributions. apt is…
Extracting images embedded in PDF files is straightforward on Linux with several reliable tools. Here are the most practical approaches, from GUI tools to command-line solutions. GUI Tools LibreOffice Draw remains the simplest option if you prefer a graphical interface. Open the PDF file in LibreOffice Draw, right-click on any image, and select “Save Image…
The git diff –word-diff output is clean and readable for tracking changes at the word level instead of line-by-line. If you need that functionality outside a git repository—or just want a standalone tool—wdiff is purpose-built for exactly this. Using wdiff for word-level diffs wdiff compares two files word by word, where a word is defined…
When pushing to GitHub over HTTPS, you’ll see: error: The requested URL returned error: 403 Forbidden while accessing https://github.com/username/repo.git fatal: HTTP request failed This means Git connected to GitHub successfully, but your credentials were rejected. Common causes: Expired or revoked Personal Access Token (PAT) Using a password instead of a PAT (GitHub disabled password auth…
The TP-LINK T2U is a USB WiFi adapter based on the MediaTek MT7650U chipset. While Linux kernel support has improved significantly, you may still need to manually compile drivers on some distributions. This guide covers installation on modern Fedora and RHEL-based systems. Check if your adapter is already supported First, plug in the adapter and…
When running tree across multiple servers or sharing output with teammates, you’ll notice the formatting can vary significantly. Some systems display box-drawing characters while others use ASCII pipes and dashes, making diff comparisons and documentation inconsistent. Understanding the Charset Differences The tree command respects the system’s locale and character encoding settings. By default, it will…
gThumb’s preferences aren’t always obvious when you’re looking through the traditional menu bar. The location depends on your desktop environment and gThumb version. GNOME Desktop On GNOME 3 and later, preferences are accessed through the application menu rather than the window menu: Open gThumb Click the hamburger menu (☰) in the top-right corner of the…
Once your HP printer is working on a Linux system, enabling the scanner requires installing SANE (Scanner Access Now Easy) and HP-specific backends. If wireless connectivity is already established for printing, the scanner should be discoverable on the same network. Install Required Packages On Fedora: sudo dnf install sane-backends sane-backends-devel hplip hplip-common On Ubuntu/Debian: sudo…
Chrome stores passwords encrypted in the system keyring (GNOME Keyring, KWallet, or Pass depending on your desktop environment). To export them in plain text, you’ll need to create a temporary Chrome profile with basic (unencrypted) password storage, sync your passwords from Google Cloud, then extract them from the SQLite database. Prerequisites Chrome or Chromium installed…
The nomodeset parameter disables kernel mode setting (KMS), which is useful when you’re experiencing GPU-related boot issues or using older graphics hardware that isn’t properly supported by the kernel’s modeset driver. Here’s how to add it permanently to GRUB2. Edit the GRUB configuration file GRUB2 generates its active configuration from /etc/default/grub. Open this file with…
When you fork a repository on GitHub or GitLab, your copy diverges from the original as upstream maintainers merge new changes. To keep your fork current, you need to regularly sync it with the upstream repository. Setting up the upstream remote First, check your current remotes: git remote -v You’ll see origin (your fork). Add…