DevOps – Server and Technologies and virtualization

/DevOps - Server and Technologies and virtualization

This category deals with everything related to Linux servers and technology issues of web hosting.
Most likely this will be DevOps centered, with focus on the operational part and virtualization (VMWare product stack).

Information about mail sending PHP scripts

To be enabled to gather information about PHP emailing scripts on your server, you can add two lines to your main php.ini: mail.add_x_header = On mail.log = /var/log/phpmail.log Restart your webserver after changing the php.ini. First parameter is adding a "X-PHP-Originating-Script:" information to the mail header, stating the user name an script name sending the [...]

2015-09-23T21:21:20+02:00Tags: , , , , , , |

Bash shell vulnerable – ShellShock

Currently a new bug, named ShellShock, was announced as CVE-2014-6271 in the National Vulnerability Database. It might be even more dangerous than the SSL bug "Heartbleed" that occured some month ago. An overview, according to the web site: GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote [...]

2019-01-03T16:47:11+02:00Tags: , , , , , |

Checking for root kit… Dealing with false positives

As one of my Ubuntu root servers was rebooted today without my interaction I checked all of them for root kits with both rkhunter and chkrootkit. I started with the installation of rkhunter and chkrootkit with apt-get on the command prompt: seiler@server:/# sudo apt-get install chkrootkit rkhunter After that, I ran an update to the rkhunter [...]

2019-01-03T16:52:42+02:00Tags: , , , |

Activate your ESXi free license

To add a free license to your ESXi 5.5 installation, go to the VMware webpage and log in to your account. There you will find a "License & Download" button, where you can register for a free license. You might also search for "Free products" on the product webpage and click on "vSphere Hypervisor" to get there. Go [...]

2019-01-03T16:47:16+02:00Tags: , , , , |

The Red Screen of Death – Illegal Opcode Error

If you get the "Red Screen of Death" during an OS install on your HP ProLiant Microserver G8 after rebooting, reporting an "Illegal Opcode Error", do not worry! In most cases, this is just due to a wrong boot order configuration. Just follow these steps (and vary them if necessary to reflect your system configuration). Reboot [...]

Preparing ESXi boot image for USB Flash drive

You can easily prepare any ISO file to be booted from an USB thumb drive, by following the simple steps below: Download UNetBootin from http://unetbootin.sourceforge.net/ Connect a USB drive that can be deleted during this process. Make sure, no important data is currently on this stick! Start UNetBootin - no need to install Select "DiskImage" and "Type ISO" Choose [...]

2019-01-03T16:47:17+02:00Tags: , , , , |

iLO on the HP ProLiant Microserver Gen8

HP Integrated Lights-Out (iLO) is a suite of embedded management technologies, supports the complete lifecycle for the ProLiant servers. Starting from initial deployment to service alerting and ongoing management, iLO is a nice tool to be informed about your server health. The Advanced suite is quite expensive, but you can get a Evaluation licence for [...]

2019-01-03T16:47:18+02:00Tags: , , , , , , |

Running Docker on Amazon EC2

As I am currently evaluating the three bigger cloud providers (Amazon AWS, Microsoft Azure and Google Cloud Platform) I came up with the idea to test how easy it would be to get Docker running on those providers. In this tutorial I deal with Amazon “AWS”, as I like them most out of the three [...]

2019-01-03T16:47:19+02:00Tags: , , , , |