If a host has multiple physical network adapters, it is a common procedure to combine the particular links. Mostly, this configuration is chosen to enhance the maximal throughput. Another reason for this is to make network connections more reliable by defining alternative network paths. LACP (Link Aggregation Control …

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Sometimes it happens that you lock out yourself from your Linux system. In the worst case, additional security concepts or conditions might hamper access to the system, for example: No root access System cannot be rebooted to reset the password in a chroot session No colleague with system access available Recently I …

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During the installation of kernel updates I stumbled upon a cramped /boot partition recently. Solving this issue is quite easy - e.g. it is possible to manually dig through the RPM database, exclude the running kernel and remove all other packages. Anyhow, this is neither comfortable nor elegant: 1# yum remove `rpm …

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Thanks to the lcd4linux project, Linux also offers the possibility to control LC display - e.g. to display status information. Some years ago, a very cheap digital picture frame was sold on mail-order houses like Pearl. Using an alternative firmware, this device is also capable of being controlled by lcd4linux. Since …

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Since 2008 I have been using the free Linux distribution IPCop to implement a customized firewall/a router. Of course, DSL providers also equip their customers with routers, but back then I was missing a couple of functions. To name some of them: IPSec / OpenVPN NTP time server DMZ segmentation WLAN access point with …

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With the new major version 8, GitLab was extended to include a continuous integration (CI) component that was developed as dedicated project until now. While it was necessary to utilize external solutions, such as Jenkins, previously, it it now possible to automatically compile and test managed projects easily. But, …

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This week Spacewalk was released in version 2.4 after 6 months of development. In summary, about 60 bugs were fixed and some new features were implemented. The web-interface is now available to other projects as part of the Patternfly framework. The project driven mainly by Red Hat aims at combining beatiful designs …

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While registering a client system with a FreeIPA server I recently stumbled upon the following error message: 1# ipa-client-install 2... 3User authorized to enroll computers: admin 4... 5Kerberos authentication failed 6kinit: Cannot read password while getting initial credentials After wasting quite a lot of time with …

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IOmeter is a collection of tools for running detailed IO benchmarks. It is often used as the tool is able to reproduce the characteristics of current applications and services. IOmeter consists of a management software that manages and evaluates the particular tests and Dynamo - an executable that run these tests in …

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If you are using drivers and libraries that need access to Oracle databases (e.g. perl-DBD-Oracle), you will need the Oracle Instantclient. Oracle offers this software for free after registration. Unfortunately creating correct provides tags was missed when creating the RPM packages. Even though Instantclient is …

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