RedHat can be used upon a paid subscription. You have to register your system using the following command in order to use the Yum repositories : subscription-manager register –username <username> –password <password> –auto-attach If by any chance you ran that command in the first place but you had no subscription available in your account, your… Read More »
Enabling automatic updates installation as they come available is quite easy. First, install the yum-cron utility as followed : yum install yum-cron Make sure the service is running : service yum-cron start Then enable the service on boot : chkconfig yum-cron on Optionnaly, you may want to exclude some packages from being updated, just edit… Read More »
Recently, when I try to build an open source project, I meet the following compile error: fatal error: ‘libelf.h’ file not found #include <libelf.h> ^ 1 error generated. The solution is installing elfutils-libelf-devel package: sudo yum install elfutils-libelf-devel Or: sudo dnf install elfutils-libelf-devel
The EPEL repository provides clang RPM package. So to install clang on CentOS 7, You need to install EPEL first: sudo yum install epel-release Then you can install “clang”: sudo yum install clang After this, you can use clang to compile your program.
Having this error trying to install Nginx on Debian Linux 8? dpkg: error processing package nginx (–configure): dependency problems – leaving unconfigured Errors were encountered while processing: nginx-full nginx E: Sub-process /usr/bin/dpkg returned an error code (1) This is a known behaviour if you have Apache or another Web server installed and running. The problem… Read More »
Modern and performance/server grade network interface have the capability of using transmit and receive buffer description ring into the main memory. They use direct memory access (DMA) to transfer packets from the main memory to carry packets independently from the CPU. The usual default buffering values for regular desktop NICs are 256 or 512 bytes. High… Read More »
RedHat / CentOS 7 is now shipped with Grub2 which require a different approach than the well known legacy Grub. To modify Grub2 settings or kernel parameters, edit the following file : /etc/default/grub Then regenerate the Grub config as followed : grub2-mkconfig -o /boot/grub2/grub.cfg
Since Windows 8, everything is now Metro, not just the start menu, but the boot loader too! Fortunately, there is a command to disable the Metro boot loader and enable the legacy one. To do so, you will need to open the command line utility as administrator and use the following command : bcdedit /set… Read More »
Here is how to open a port and make it permanent with the new firewalld on RedHat/CentOS Linux 7. You can statically edit /etc/firewalld/zones/zone.conf and reload the daemon, but the right way to do is the following. 1. Open the port by specifying the proper zone, port number and protocol. Unless you do not want… Read More »
Experiencing the following error while running “apt-get update” on your Ubuntu server? W: Failed to fetch http://ca.archive.ubuntu.com/ubuntu/dist/precise/restricted/source/Sources Hash Sum mismatch E: Some indes files failed to download. They haev been ignored, or old ones used instead. Just run the following command : sudo rm -Rf /var/lib/apt/lists/* And run the update command again : sudo apt-get… Read More »