Sometimes we need to find specific things in application vast logs, sometimes 10 or 20 rotated logs each hundred of MBs each. For a quick search without using some specialized log viewer we can use the very powerful bash text processing commands. Problem: We have 10 log files each 100MB and we need to find… Read More: Linux: Search logs using bash tools »
Configurations of a Windows Fail Over Cluster can be done entirely from the GUI but as we know this is valid for the simple setup. The GUI is limited to the easy cases, not for more uncommon cases. I already covered the case of the Active Directory Detached Cluster that can be created only using… Read More: Change Parameters of Windows Fail-Over Cluster with PowerShell »
After connecting my two sites using IPSEC see ipsec site-to-site with virtual tunnel interface/ it is easy to ssh to the remote site and OpenVPN see OpenVPN site to site Let us go a step further and activate also remote desktop. I want to be able to connect from my Linux machines but also from… Read More: Linux: How to remote desktop to Fedora Linux from a… »
Because the number of my systems increased moving all my stuff to a rack was the right decision to avoid cable spaghetti and administration hell. But when you have a rack you need to have an administration console for it. Looking on the market (the deals market) the cheapest console I could find was some… Read More: Server Rack: Create your own low-cost rack console »
I was relocating my servers in a new rack and configuration and decided to put all my ILO ports to a different router with no DHCP. Obviously I ended up with some fake IP6 address defaulted to the ILO device. To make the changes to ILO without a server reboot we have the nice hponcfg… Read More: Change HP ILO settings without server restart »
I wanted to move my test db2 installation based on a Fedora Core 23 to a RHEL7 virtual machine without having to reinstall everything and not lose any data. This is in fact cloning my test environment database. This is not an easy task as is not officially supported by IBM but the beauty of… Read More: Clone DB2 10g FC23 install to a virtual machine (FC23… »
At some point my RHEL7 development virtual machine run out of space. Resizing the image is really made easy by RedHat: STEP 1: Resize the virtual machine disk [root@localhost VMs]# qemu-img resize RHEL7-clone.qcow2 50G Image resized. [root@localhost VMs]# STEP 2: Start the VM and check the disks from inside the VM Check the virtual disk:… Read More: Resize a RHEL7 QEMU/KVM image »
The requirement that an enterprise system has high availability on site and across sites is very often encountered in the world of financial systems. To achieve this requirement the obvious solution is to have a cluster on the primary site (PR) and another cluster on the disaster recovery site (DR). On the PR we created… Read More: Deploy Windows cluster on two sites with only one domain… »
I have two sites hosting my home servers so I wanted a solution to have a permanent link between the sites. On site one I have an EdgeRouter POE and on the other site an EdgeRouter Lite and the obvious solution is to have a site to site VPN on a permanent basis. There is… Read More: EdgeRouter: OpenVPN site-to-site VPN »
After an OwnCloud upgrade I was getting complains from my users that WebDav and OwnCloud windows client were no longer able to upload files. By looking into owncloud.log the following was the repeated error: {“app”:”remote”,”message”:”An exception occurred while executing ‘SELECT * FROM `oc_locks` WHERE `userid` = ? AND (`created` + `timeout`) > 1456517102 AND ((… Read More: Owncloud 8.1.5: File upload error Table ‘homeclouddb.oc_locks’ doesn’t exist” »