Tag Archives: SysAdmin

How to Install Graylog 3 on RHEL 7 or CentOS 7

System log is very crucial part in debugging a system. System log will write down any details from system activity in OS level or on each applications. Thats why log management is needed and also important. Graylog is an open source log management and analysis tool for anything such as …

Read More »

How to resolve cannot set max_connections through my.cnf

I have some problem with MySql/MariaDB configuration to set max_connections parameter in /etc/my.cnf but MariaDB does not seem to read the parameter from the file. This appears to be some bug in the new mysqld. Setting max_connections to 1000, it was  reset to 214 during service restart/startup. # grep -i …

Read More »

How to enable GUI in VPS

Either you have unmanaged Ubuntu or Cent OS server, it comes with no graphical user interface. If you have no experiences before using Unix command system, you will have trouble and need some time to figure it out. You can enable GUI for your VPS with the help of some …

Read More »

How to Set Session Timeout in Red Hat

As administrator we use ssh to manage our server, as day to day operation. As i am still in the middle of my work, and ssh session has given me timeout, it will push me to auto-logout when there is no activity. It really pissed me if i still have …

Read More »

Docker Tutorial for Beginners

Docker is a platform software that enables you to make, test, develop, and distribute apps fast. Using Docker, you can easily develop and deploy an app to any environment and make sure your code works. This is a convenience feature of docker for us, developers. Docker containerizes software in a …

Read More »

How to install Docker in RHEL 7.x

As in Docker documentation, they do not support Docker in Red Hat Enterprise Linux system. To use Docker in RHEL, you need maintained CentOS version. Archived version is not supported. Uninstall Old Docker Version First you need to uninstall any old Docker version if exist. yum remove docker \ docker-client …

Read More »

snmpd an SNMP Agent

snmpd is an SNMP agent for collecting, monitoring, and managing information from managed devices on IP network equipments. This post will guide you how to enable and configure SNMP Server (snmpd) on Linux servers. How to enable SNMP server on Linux All Linux distributions arrives with net-snmp in-box. So, you …

Read More »

Build your own Docker Hub Image

We are going to push your repository to Docker Hub and build image automatically. This guide will help our DevOps team keep updated with the latest image globally. Let’s get started! Create a Github account If you already have a Github account you can use it. We assume you have …

Read More »

tmux Tutorial

tmux or terminal multiplexer; it allows several terminals to be created, accessed, and controlled from a single screen. tmux maybe detached and attached later and keep in progress tasks without interrupting it. It is one of my favorite tools. I run some tasks unattended and close the terminal. And i …

Read More »