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 »
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 »
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 »
Here is a quick list of useful commands for any MySQL database administrator. Show the server full status : mysqladmin -u root -p extended-status You may also sort specific information with “grep” as followed : mysqladmin -u root -p extended-status | grep Threads Show the current running process and queries (remove “-i 1” to display… Read More »
VMware ESXi hypervisor have some great SNMP capability, whatever to gather information status of your hardware, monitoring or statistic usage of your resources. Follow these easy steps to enable such feature. 1. Enable SSH from the vSphere client and connect to it using your favorite terminal application : Configuration tab > Security Profile > Services >… Read More »
Using cURL, you can easily grab some information about the server who’s running a Web site. To get all the possible information, simply use (replace domain.tld with the actual domain name) : curl -s -I domain.tld You can also can just output the server info like this : # curl -s -I microsoft.com|grep Server Server:… Read More »
Using Nginx as Apache reverse proxy and receiving “502 Bad Gateway” error and, additionally have something like this in your error log file? [error] SSL_do_handshake() failed (SSL: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol) while SSL handshaking to upstream, client: 0.0.0.0, server: www.domain.tld, request: “GET / HTTP/1.1”, upstream: “https://127.0.0.1:4343/”, host: “www.domain.tld” Since you are using SSL, you obviously need… Read More »
Having this error while uploading large files with Nginx? 413 Request Entity Too Large or ; [error] client intended to send too large body 1. Edit the main Nginx configuration file : /etc/nginx/nginx.conf 2. Append the following and set the value to meet your needs (this example assume that the max upload file size is… Read More »