How to Install RedMine on CentOS 7

29. January 2018 CentOS, RHEL, SysAdmin 2
How to Install RedMine on CentOS 7
Install Software Collections yum -y install yum-plugin-priorities Add [priority=1] to official repository sed -i -e "s/]$/]npriority=1/g" /etc/yum.repos.d/CentOS-Base.repo yum -y install epel-release Add [priority=5] to the EPEL repo sed -i -e "s/]$/]npriority=5/g" /etc/yum.repos.d/epel.repo Add CentOS SCLo Software collections Repository. [[email protected] ~]# yum -y install centos-release-scl-rh centos-release-scl Add [priority=10] to the SCL repository [[email protected] ~]# sed -i ...

SSH or git-clone via Proxy

SSH or git-clone via Proxy
Today we were setting up few Web servers on a private network which will be serving the traffic through the Load Balancer. The setup was simple until we came to know that the Webservers needs to connect to github.com for the repository access.   Diagnosis We have a jumpbox / Bastion (10.10.1.10) which is used for ...

Jenkins not starting on CentOS 7 / RHEL 7

Jenkins not starting on CentOS 7 / RHEL 7
Today i was installing Jenkins on a CentOS7 systems. After installing it via Jenkins yum repository, the service was not stating. The java was already installed on the server. Issue You have installed jenkins on a CentOS7 / RHEL7 system. jenkins is not starting via systemctl start jenkins command, and it is throwing journalctl -xn error. Caused ...

OpenVPN with CSF firewall rules

02. February 2017 CentOS, RHEL, SysAdmin 0
OpenVPN with CSF firewall rules
We are a big fan of OpenVPN when it comes to security. Many organizations have already switched to OpenVPN from PPTP etc. NixVPN is my favorite VPN software to host it on a standalone instance. But what if, if you already have a server protected with CSF firewall, and you want to install OpenVPN by ...

Disable SU access for sudo users

11. January 2017 AWS, CentOS, RHEL 0
Disable SU access for sudo users
Some times you need to disable sudo su – access on your environment so that the users will use sudo command always and they will not switch to any other users account unnecessarily Lets see how to do it Edit the /etc/suoders by running visudo visudo Add the below Command Alias Cmnd_Alias BLOCKSU = /bin/su ...

httpd.service: main process exited kill: cannot find process “”

15. September 2016 CentOS, RHEL, SysAdmin 0
httpd.service: main process exited kill: cannot find process “”
Today apache was stuck with the below error and it was not starting at all. Sep 15 06:18:24 server.example.com systemd[1]: Starting The Apache HTTP Server... Sep 15 06:18:24 server.example.com httpd[15037]: [Thu Sep 15 06:18:24.591424 2016] [so:warn] [pid 15037] AH01574: module ruid2_module is alread...skipping Sep 15 06:18:33 server.example.com systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE Sep 15 06:18:33 ...