Linux 2.0 Kernel: Upgrade Guide and System Requirements This document provides the essential software versions and upgrade instructions for running Linux 2.0.x kernels successfully. It covers package compatibility, known issues, and practical solutions for system administrators upgrading from earlier kernel releases. Networking Configuration The loopback route configuration in many older network scripts is incorrect and…
Download and Cache RPM Packages with DNF and YUM DNF and YUM automatically download RPM packages and their dependencies during installation. If you need to build offline installation media, create local mirrors, or avoid repeated downloads across multiple systems, you’ll want to preserve those packages instead of letting them disappear from cache after installation. This…
Installing Wine 32-bit on RHEL/CentOS 8+ RHEL and CentOS 8+ ship as 64-bit only. Some Windows applications run better or exclusively under 32-bit Wine, which requires compiling both 64-bit and 32-bit Wine from source in a specific order: 64-bit first, then 32-bit, then 64-bit again to link properly. Build Dependencies Install required build tools and…
Excluding packages from specific repositories in DNF/YUM When managing packages on RHEL, CentOS, AlmaLinux, or Fedora, you sometimes need to prevent a package from being installed or updated from a particular repository. This is useful when multiple repos provide the same package and you want to control which version gets pulled in. Repository-specific exclusions with…
Installing alien on CentOS/Rocky Linux to convert .deb to .rpm alien is a straightforward package converter available in EPEL that handles conversion between .deb, .rpm, Slackware, and other package formats. This is useful when you need to install Debian packages on RPM-based systems. Prerequisites You need EPEL (Extra Packages for Enterprise Linux) enabled. On CentOS…
Installing GFortran on RHEL-Based Systems GFortran is the GNU Fortran compiler from the GCC toolchain. It’s essential for scientific computing, numerical simulations, and legacy Fortran code maintenance. Quick Install On modern RHEL-based systems (RHEL 9+, Rocky Linux, AlmaLinux, CentOS Stream): sudo dnf install gcc-gfortran On CentOS 7 (EOL since June 2024), the older yum package…
Adding PHP XML extension to Apache on RHEL/Rocky Linux If you’re seeing PHP errors like Class ‘DOMDocument’ not found, your PHP installation is missing the XML extension. This is common after migrating sites or fresh installations where the base PHP package doesn’t include DOM support out of the box. Install php-xml The solution is straightforward…
Upgrading Vim to Version 8+ on CentOS/RHEL Systems If you’re running an older CentOS or RHEL system with Vim 7.4, upgrading to Vim 8 or later gives you modern features like async I/O, jobs API, terminal emulator support, and better plugin performance. Here are the practical approaches. Check Your Current Version $ vim –version VIM…
Installing EncFS on CentOS and RHEL-based Systems EncFS is a FUSE-based encrypted filesystem that lets you create an encrypted directory without a separate partition. Installation approaches vary depending on your distribution version and repository availability. Using Distribution Repositories On modern RHEL-based systems (CentOS Stream, Rocky Linux 9+, AlmaLinux 9+), EncFS is typically available in the…
I keep seeing messages in dmesg as follows with “exception Emask 0x10” -> “SError: { UnrecovData 10B8B BadCRC }” -> “failed command: READ FPDMA QUEUED” -> “hard resetting link”: [ 7395.936692] ata4.00: exception Emask 0x10 SAct 0xe000 SErr 0x280100 action 0x6 frozen [ 7395.936701] ata4.00: irq_stat 0x08000000, interface fatal error [ 7395.936703] ata4: SError: {…
YouCompleteMe for Vim on Fedora 41 reports this error: [zma@laptop:~/.vim/bundle/YouCompleteMe]$ ./install.sh — The C compiler identification is GNU 4.9.2 — The CXX compiler identification is GNU 4.9.2 — Check for working C compiler: /usr/bin/cc — Check for working C compiler: /usr/bin/cc — works — Detecting C compiler ABI info — Detecting C compiler ABI info…
How to enable RPM Fusion for Rocky Linux 9? Enable RPM fusion on RHEL 6 or compatible like CentOS: su -c ‘yum localinstall –nogpgcheck http://download1.rpmfusion.org/free/el/updates/6/i386/rpmfusion-free-release-6-1.noarch.rpm http://download1.rpmfusion.org/nonfree/el/updates/6/i386/rpmfusion-nonfree-release-6-1.noarch.rpm’ It will install https://fedoraproject.org/wiki/EPEL. If it fails to install EPEL automatically, you will need to install it manually. Reference: http://rpmfusion.org/Configuration Editor’s note: This article has been updated to reflect…
Do you know how to display chinese character in lxterminal? I tried to install lxterminal on my workstation and it seems display Chinese characters well: FYI, my Linux system is Fedora 41. The lxterminal version: $ rpm -q lxterminal lxterminal-0.1.11-10.fc21.x86_64 Not sure what’s the reason why it does not work for you. You may check…
How to List Files in a Debian Package To see what files a .deb package will install (or has installed), use dpkg. The Commands Installed package: dpkg -L package-name Not-yet-installed .deb file: dpkg-deb -c package.deb Linux Packaging in 2026 In 2026, dpkg and apt remain the core of Debian/Ubuntu systems. However, for cross-distro compatibility, many…
I am using Fedora 41. I installed the rpm from Oracle for the Oracle JDK. How to set up the environment so that the Java environment is Oracle JDK instead of the OpenJDK? The Oracle JDK is install to /usr/java/ directory. On my Fedora 41, it looks like this: $ ls /usr/java -l total 4…
How to quickly find out which rpm package provides a command on Fedora Linux? As an example, we want to find out which package provides the ping command. You can quickly find it out by rpm: $ rpm -qf `which ping` It will give iputils-20121221-2.fc19.x86_64 Alternatively, you can use yum: $ yum provides `which ping`…
How to upgrade Fedora 41 to Fedora 41 through the network? The tool for Fedora to upgrade the distribution is FedUp. Check this page for how to upgrade Fedora 41 to Fedora 41: http://fedoraproject.org/wiki/FedUp#How_Can_I_Upgrade_My_System_with_FedUp.3F Be sure to check the bugs in Fedora 41 before the upgrading: http://fedoraproject.org/wiki/Common_F20_bugs#Upgrade_issues Generally, it contains 3 steps: Preparation # yum…
Installing sbt on Fedora Linux sbt (Scala Build Tool) isn’t available in the default Fedora repositories, though Scala itself is. Here’s how to install it properly. Using the Official Repository The most reliable approach is to add sbt’s official repository to your system. This gives you automatic updates and avoids manual RPM downloads. Create the…
Installing Java plugin for Chrome on Linux x86-64 Note: Java in web browsers is obsolete. Most websites stopped requiring Java applets years ago, and all major browsers removed plugin support by 2016. If you’re here because a legacy application needs Java, consider running it in a containerized environment or dedicated VM instead. If you absolutely…
Converting and installing .deb packages on Fedora Fedora uses RPM packages managed by DNF, but you’ll occasionally encounter software distributed only as .deb files (Debian format). You have several options: convert the .deb to RPM, extract and repackage it, or use containerization. Here’s what works in practice. Using alien to convert .deb to RPM The…