Problem solve

Problem solve

Get help with specific problems with your technologies, process and projects.

• Strategies for planning a data center move

  If you have plans to relocate your mainframe shop, remember that the best data center move strategies include careful testing and a team that's both business- and tech-savvy. Continue Reading

• Increasing network bandwidth available to virtual machines

  These three tips on increasing the amount of network bandwidth available to your VMs, including virtual network creation, can also potentially increase a host server's VM density. Continue Reading

• Addressing data center power failure and its root causes

  Data center downtime is most often a result of human error. But with proper capacity planning and battery selection, among other steps, a data center power failure can be averted. Continue Reading

• Deciding when to use Linux file system barriers

  Linux file system barriers in Ext3 and Ext4 protect data written to the journal. Learn how these barriers work and in which use cases they are a benefit, and in which cases you should disable them on your Linux servers. Continue Reading

• Doing business with Apache OFBiz: Open source ERP solution

  Many large sucessful enterprises use Apache OFBiz as their ERP solution. Find out how to get started with this open source tool for your e-business. Continue Reading

• Addressing data center power path issues and common failure points

  The loss of power in the data center is often troublesome and unexpected, but knowing these common failure points and ways to mitigate power path issues can ease the burden.Continue Reading

• Configuring load balancing with Linux Virtual Server

  Using Linux Virtual Server, learn how to configure load balancing to help avoid busy servers and achieve optimal resource utilization on your Linux system.Continue Reading

• Truths and reasoning behind mainframe modernization

  Mainframe modernization offers a host of benefits, including cost savings and preserving investments in legacy applications, but is it the best strategy for your IT department?Continue Reading

• Nagios notifications: Setting up alerts in the network monitoring tool

  In this tip on the open source network monitoring tool Nagios, learn how to set up custom configurations that can send Nagios notifications to admins at any time of the day.Continue Reading

• Five tips for negotiating IT support contracts with vendors

  With IT budgets slashed, now is the time for vendor negotiation to get the most bang for your contract buck. These five approaches can help lower IT support contract costs.Continue Reading

• Mainframe problem analysis: What's the worst that could happen?

  In this mainframe humor observation, an overconfident programmer gets more than he bargained for when he takes his shot at analyzing a TSO problem.Continue Reading

• Best practices for VM workload management, resource allocation

  Effective VM workload management practices such as setting metrics can help you achieve the most efficient workloads and avoid the mistake of over-allocating resources to a VM.Continue Reading

• Working with Linux file system attributes

  File system attributes can provide a valuable addition to the way you ensure security on your Linux server. Learn how to mount, list and change file system attributes in ext4.Continue Reading

• SELinux tutorial: Introduction to Linux kernel security

  SELinux may seem too complex for some administrators who instead disable the useful Linux kernel security tool. Learn how SELinux works, including how subjects and objects work and security policy settings.Continue Reading

• SAN technology considerations for data center virtualization

  While storage area networks (SANs) are key in a virtualization rollout, one company found that problems can arise when an initial SAN deployment isn't properly planned.Continue Reading

• Two forgotten but useful CICS transactions

  While CICS has evolved its system interface, the lesser-known CICS transactions ADYN and CSFE can still be useful for debugging and other tasks.Continue Reading

• Setting up MindTouch document management on a Linux system

  MindTouch is an open source document management system alternative to SharePoint and other commercial software. In this tip, learn how to set up MindTouch on a Linux server, using CentOS 5.5 as the example system.Continue Reading

• RHEL 6 ditches System V init for Upstart: What Linux admins need to know

  System V init is fading to a memory in Linux boot systems as the new Linux disdribution releases, such as Red Hat Enterprise Linux 6, switch to using Upstart. Learn what is different with this boot service and how to work with it to get your Linux ...Continue Reading

• Optimizing SUSE Linux performance for VMware environments

  Learn how to optimize Suse Linux Enterprise Server (SLES) on VMware by optimizing VMware and SUSE. For better performance, switch to VMware's paravirtualization disk driver and adjust I/O settings in SUSE along with changing the journal settings.Continue Reading

• Bash commands for navigation, sharing, and find

  Learn how to use Bash on a Linux server to change command line navigation, switch around in directories, file first redirection, three find commands, and how to show people the command line without giving them access through rerouting.Continue Reading

• Red Hat Enterprise Linux security mechanisms: SELinux, iptables and more

  When setting up Red Hat Enterprise Linux on your data center servers, you need to make security decisions. Learn about security options for RHEL including SELinux, iptables firewall, TCP Wrapper and application security use considerations.Continue Reading

• Data center EPO vulnerability fixed in 2011 National Electrical Code

  Data centers are no longer required to put the big red kill-switch on exit doors, thanks to a committee that convinced the NFPA to revisit its data center EPO regulation.Continue Reading

• Is it time for a data center hardware refresh?

  Options are plentiful when you're considering whether to refresh older data center hardware, even when IT budgets are not.Continue Reading

• Creating an inventory with nmap network scanning

  Nmap network scanning generates a full system inventory, but it's only usable with the right parameters and output format. Learn how to create an nmap inventory in this tip.Continue Reading

• Mounting file system resources with AutoFS

  AutoFS allows resources to be mounted on an as-needed basis, simplifying the management of NFS shares. This tip walks you through the process of setting up AutoFS.Continue Reading

• Incorporating adiabatic humidification into your data center

  Adiabatic humidification is a more energy-efficient means of providing humidity to data centers, and this tip outlines the steps to incorporating it into your data center.Continue Reading

• Monitoring and optimizing host server performance

  Application performance is even more important in physical servers that share multiple VMs, so ongoing monitoring and optimization of virtual host servers should be routine in any virtual data centerContinue Reading

• Making the most of server maintenance contracts

  When trying to obtain the most value from your servers, watching terms and doing homework on server maintenance contracts can save at the negotiating table.Continue Reading

• Converting XML to data structures using the CICS TRANSFORM command

  This tip explains how to use the new CICS TRANSFORM command for converting XML to data structures and vice versa.Continue Reading

• The pros and cons of cloud computing migration

  IT managers should consider the pros and cons of cloud computing migration, and find a balance between the rewards and risks associated with moving a data center to the cloud.Continue Reading

• Setting up a syslog server in Linux

  A central logging server can make it easier to manage logs. In this tip, learn how to collect and centralize syslog messages from your hosts onto one syslog server in Linux.Continue Reading

• Using your Linux server to create an ad-hoc wireless network

  In this tutorial, an expert explains how to set up an ad-hoc wireless network access point with your Linux server.Continue Reading

• Uptime, TIA and BICSI: Who runs the data center design standards show?

  With three major players in the game, where should you look for data center design standards? This tip discusses the similarities and differences between the Uptime Institute tier system, TIA-942 and BICSI 002-2010.Continue Reading

• Kerberos authentication in RHEL: Easing Windows-Linux integration

  Kerberos authentication for CIFS offers easier Windows-Linux integration. In this tip, learn how Kerberos authentication works and how to set it up in Red Hat Enterprise Linux.Continue Reading

• Unix overview: The latest features in AIX, HP-UX and Solaris

  Each of the major Unix versions have been updated with useful new features recently. In this overview, get up to date on the features you should know about in the latest releases of IBM AIX, Hewlett-Packard's HP-UX and Oracle's Solaris.Continue Reading

• Biodiesel mandates cause backup generator problems

  States such as Minnesota and Oregon have passed biodisel mandates, but data center managers say improper handling of biodiesel can cause problems for backup generators.Continue Reading

• The IT chargeback system in a virtual data center

  Managing chargeback can be a difficult task. Multiple company departments may share server hardware in a virtual data center. Learn how to implement an IT chargeback system that charges departments for resources fairly.Continue Reading

• Moving to Fibre Channel over Ethernet in the data center

  High data center demands require an efficient network to move data efficiently. Learn why Fibre Channel over Ethernet may be a good networking technology option, and how to make the switch.Continue Reading

• Displaying Puppet reports on Puppet Dashboard

  Managing configurations with Puppet just got easier. In this tip, learn how to display your Puppet reports on the Puppet Dashboard GUI.Continue Reading

• Server virtualization training and education needed for successful virtualization rollouts

  Virtualization technology is still a long way from Plug-and-Play. Successful virtualization rollouts need staff with the proper education and skills, and IT admins need to understand when it's time to add staff or tinker with the training.Continue Reading

• Optimizing Linux swap space usage

  Today's powerful servers with plenty of RAM can make swap space seem like a thing of the past, but knowing how much you need can help keep your system running smoothly.Continue Reading

• Managing CICS performance with Workload Manager

  Workload Manager is a useful tool for easily managing CICS performance on the mainframe. This tip details how CICS and WLM interact with one another and how to use WLM to manage CICS response times.Continue Reading

• Microsoft Windows Server 2008 licensing for virtualization

  Choosing the right Windows Server 2008 edition can save big money in a virtual data center.Continue Reading

• Installing the ModSecurity Web application firewall on Red Hat Enterprise Linux

  Learn how to set up the ModSecurity Web application firewall on Red Hat Enterprise Linux 5.4 and Apache Web server 2.2.x. This firewall monitors access to Web servers to ensure that requests are valid and not malicious.Continue Reading

• The history of Unix on the PC: Exploring lesser-known variants

  This tip explores the history of Unix, from its creation by AT&T in the 1960s to its present-day use on x86 hardware and PC-compatible systems. Brush up on your Unix history and learn about Unix variants that you never knew existed.Continue Reading

• How to prevent and correct server cooling failures

  Advanced planning can prevent server cooling failures, and good practices can help to remedy them and minimize the negative impact on your data center.Continue Reading

• Calculating carbon emissions in the data center

  While data center carbon measurement is in its infancy and lacks hard standards, it still may benefit IT admins to know basic methods for calculating carbon emissions as carbon legislation begins impacting data centers.Continue Reading

• IBM's zPDT offers developers z/OS on the desktop

  IBM's System z Personal Development Tool (zPDT) allows developers to emulate z/OS on their desktops, but could zPDT be more beneficial if it IBM made it available to a broader audience?Continue Reading

• Determining the true value of a server operating system

  One of the most critical decisions a network manager can make is which server operating system to deploy. Making that choice is fraught with budget limitations, corporate politics and a numerous other factors. Here, an expert discusses how to ...Continue Reading

• Look to the Kyoto wheel to maximize free data center cooling

  The Kyoto wheel, a heat wheel redesigned specifically for data centers, can extract the maximum benefit from free air-side cooling. By incorporating Kyoto wheels into your data center cooling strategy, you can drastically lower electrical ...Continue Reading

• How to install Webmin and ease data center server management

  In this introduction to Webmin, learn how the tool can make it easier to manage Unix and Linux servers in your data center. An expert describes how to install Webmin and get started with this free systems management tool.Continue Reading

• Bus track and busway power distribution: Power anywhere?

  Bus track and busway power distribution in the data center is a growing trend that allows for greater flexibility and accommodation of rising power densities. This in-depth exploration of bus-type power systems will help you decide whether this is a...Continue Reading

• Overcoming common Unix-to-Linux migration pitfalls

  You may encounter problems when moving from Unix to Linux. Learn about hardware and application compatibility challenges and how to overcome deployment errors and how to prevent them including client testing, shell script testing, and more.Continue Reading

• Linux distribution migration: Planning for efficiency

  Migrating from one Linux distribution to another to consolidate the operating systems within your data center? Learn what steps are needed for a smooth transition with support.Continue Reading

• Serializing on the mainframe with the compare-and-swap instruction

  The compare-and-swap instruction is one of the mainframe's low-cost serialization options. In this tip, mainframe expert Robert Crawford explains compare-and-swap features and limitations.Continue Reading

• Linux troubleshooting fast guide

  This useful reference guide to Linux troubleshooting involves everything you need to know to manage Linux in the enterprise, from addressing boot problems to recovering your Linux server.Continue Reading

• Best practices for choosing a colocation data center

  Incorporating colocation into your IT strategy eliminates the expense of building or upgrading your own facility, but choose your colocation data center wisely, as providers vary greatly in terms of service costs, connectivity and service-level ...Continue Reading

• Booting a Xen virtual machine from CD-ROM or DVD

  If your Xen virtual machine fails, you may want to boot it from an installation disk and run the rescue program. Learn the required steps to succesfully boot a Xen virtual machine from a disk on a Linux machine.Continue Reading

• How to approach IT staffing in today's data center

  Virtualization and tight budgets have changed IT staffing in modern data centers. Find out how to blend skills and technology for the best mix.Continue Reading

• Running z/OS on x86: Should IBM release a mini-mainframe?

  Would running z/OS on x86 with a "mini-mainframe" allow users the benefits of mainframes with the simplicity of distributed systems? In this tip, mainframe expert Robert Crawford makes the case for x86 mainframes and discusses how IBM could approach...Continue Reading

• Data center transformer types and the K-Factor

  The K-Factor system rates data center transformers, and the typical options are K-1, K-13 and K-20. Consider purchase price and potential cost savings when choosing a transformer.Continue Reading

• Which data center power distribution voltage should you use?

  As power density rises, IT departments are reconsidering which data center power voltage to use. This tip covers power distribution options and which factors to consider to make the best choice for your data center.Continue Reading

• Using virtualization for cost-effective servers

  If it's done right, optimizing server utilization with virtualization can save data centers money.Continue Reading

• Five things you didn't know Bash could do on Linux

  Bash offers a lot of tools to Linux admins, and it may take you years to get a handle on all the useful ones. Learn five lesser-known Bash scripts for your Linux systems including extended globbing, cdspell shell options, improved Bash history, ...Continue Reading

• Troubleshooting PGMIDERR/AEI0 ABEND in CICS Transaction Gateway

  This tip delves into resolving PGMIDERR/AEI0 ABEND errors within the CICS Transaction Gateway. The solution to these errors isn't always an intuitive one, and may require several additional and lengthy steps along the way.Continue Reading

• Using libguestfs to easily access Linux virtual machine file systems

  Libguestfs is a library on Linux that helps you access and modify virtual machine disk images. You can then run Linux commands and troubleshoot the machine image from the libguestfs shell or host operating system. Learn how to navigate libguestfs, ...Continue Reading

• Putting old data center hardware to use

  After a consolidation, old data center hardware can do a lot more than just take up space in your facility. This tip explores options for putting old IT equipment to use.Continue Reading

• Efficiently managing z/OS WLM

  IBM's z/OS Workload Manager (WML) is designed for the best response time, but it doesn't always result in balanced workloads. This tip delves into z/OS WLM efficiency.Continue Reading

• How to optimize VM placement in data centers

  Move from conservative to aggressive VM placement and reap the server consolidation benefits while maintaining performance.Continue Reading

• Common security flaws to check for on your Linux-based Web systems

  Your Linux server may have Web application-related security vulnerabilities that should be checked out and repaired. These can include passwords, PHP code injection, weak file and directory permissions and outdated Apache and PHP versions. Learn ...Continue Reading

• Expanding CICS security on the mainframe

  While CICS security is generally adequate in terms of locking down resources, there are some instances where the existing resources may be used differently or non-CICS components might seek to be secured. Find out how to improve your protection. ...Continue Reading

• Making Sybase database upgrading easier with 'A Practitioner's Guide to upgrading to Sybase ASE 15'

  Learn more about the nuances of the upgrade to Sybase ASE 15 in this Q&A with a veteran Sybase expert and author of 'A Practitioner's Guide to upgrading to Sybase ASE 15.'Continue Reading

• Novell drops NetWare support: What do millions of users do?

  Novell's NetWare support is ending and millions of users must choose a new OS with comparable services. This tip outlines possible strategies for replacing NetWare.Continue Reading

• Fixing Linux I/O write performance problems

  Learn how to optimize your Linux server for I/O writes by adjusting I/O scheduler settings and journaling settings along with some advice about partition set-up.Continue Reading

• Using common Linux mail clients with an Exchange Server

  Begin your migration away from Microsoft Exchange by learning how to set up Linux mail clients, Evolution and Thunderbird, to talk to Exchange.Continue Reading

• Analyzing Linux write performance problems with iotop

  Write performance on a Linux system may be causing a performance problem, and iotop shows you how the write processes are affecting I/O and storage. The iotop Linux command is more informative than top for determining the cause of the Linux server ...Continue Reading

• Will a transformerless UPS work for your data center?

  In recent years, the popularity of the transformerless UPS has begun to rival that of transformer-based systems. But is the transformerless UPS as reliable and efficient of a choice for your data center?Continue Reading

• Narrowing down GTF trace output

  The General Trace Facility (GTF) in MVS is useful for identifying problems, but narrowing down GTF trace data can be daunting. This tip offers a how-to on narrowing down GTF trace output to simplify debugging.Continue Reading

• How the vSwitch impacts the network in a virtualized data center

  Though a vSwitch, or virtual switch, is very similar to a physical switch, larger virtualized data centers should be aware of how vSwitches can impact the network in terms of management, configuration and more.Continue Reading

• Installing Ubuntu 9.10 and the Eucalyptus enterprise cloud computing platform

  Learn how to install Ubuntu 9.10 server edition with Eucalyptus enterprise cloud and set it up to manage applications on AWS or other infrastructure services. Features of the Ubuntu store, including available operating system images and the use of ...Continue Reading

• Porting applications from Unix to Linux

  To port applications to Linux start with an in-depth discovery process, examining Unix application compatibility and determining whether they're compatible with Linux. The hardware platform and operating system distribution also need to be ...Continue Reading

• Linux cloning over the network using netcat

  Use netcat to clone Linux images over the network onto multiple servers with a series of simple Linux commands including tar, tee, and dd. This alternative to tools like Clonezilla does not require setting up a separate server.Continue Reading

• Finding the best capacity planning tool for your data center

  A capacity planning tool can benefit data centers by collecting data, managing virtual machines and preventing bottlenecks. Keep these considerations in mind when choosing and implementing a capacity planning tool.Continue Reading

• Linux ext4 file system: Performance and compatibility

  The ext4 file system is now shipped with the most popular Linux distributions, but when should you use it and how do you optimize performance? Learn when to use the ext4 file system and how to set up your Linux system for maximized compatibility and...Continue Reading

• Dealing with CICS/MQ trigger interface quirks

  Despite its simplicity, the CICS/MQ trigger interface has its share of quirks, such as messages left in queues and uneven workload distribution. An expert shares fixes for common CICS/MQ message triggering problems in this tip.Continue Reading

• Getting started with OpenVAS

  OpenVAS is an open source network security scanner, and version 3.0.0 has useful features for your Linux system. Learn how to install and set-up OpenVAS in your data center from source on a Linux server.Continue Reading

• Designing a Linux virtual network for KVM virtualization

  Determine how to configure the virtual and physical network cards for optimal performance on a Linux network with KVM hypervisor. The best use of individual network cards and virtual network cards depends on the I/O of the virtual machines on the ...Continue Reading

• Second look at HPC: Is retail ready for supercomputing?

  Five years ago, IT pundits said nontraditional supercomputing customers, specifically retailers, would soon buy high-performance computing, or HPC, for business intelligence. Did those predictions come true?Continue Reading

• Data center efficiency: Which tactics are worth the cost?

  Which data center energy-efficiency tactics are worth the effort? Which data center energy-efficiency measures do not return on investment? This tip illustrates how much you can expect to save on various green IT improvements.Continue Reading

• Linux networking: Using ip tool instead of ifconfig

  If your server was configured manually, make sure the Linux network is set up with the correct IP configurations and the ip tool is being used to monitor your systems.Continue Reading

• Finding password weaknesses in your Linux systems

  Getting through the security of your Linux systems might be easier than you think. Prevent unauthorized access by searching out unexpected password weaknesses.Continue Reading

• Developing a successful mainframe migration strategy

  A successful mainframe migration strategy requires careful planning to avoid disruption to end users. This tip discusses best practices for migrating, regenerating or replacing mainframe applications.Continue Reading

• Coding a simple mainframe cryptography program

  How do you code a System z cryptography program? Mainframe expert Robert Crawford takes you through the process of using the Integrated Cryptographic Service Facility.Continue Reading

• Server hardware cost comparison: Is virtualization cheaper?

  Server virtualization's popularity is on the rise, but the cost of hardware for virtualization can be surprisingly high. In this tip, an expert compares the costs of eight small physical servers versus one large, 16-core machine running server ...Continue Reading

• Sizing computer room air conditioners for data center energy efficiency

  Choosing a right-sized computer room air conditioner (CRAC) is crucial to data center energy efficiency, but there are many variables to consider. Learn more about data center air conditioning design, maintaining humidity levels and temperature, and...Continue Reading

• Access and repair an ext3 file system with the superblock

  A damaged ext3 file system is accessible and repairable, thanks to the data within either the superblock or the superblock's backup.Continue Reading

• Solving Linux server hangs stemming from kernel issues

  When Linux kernel issues cause functional machines to hang, determining the type of hang -- interruptible or non-interruptible -- is imperative to troubleshooting the situation.Continue Reading

• Reduce chances of hardware failure with preventive server maintenance

  Data center hardware failure may occur on occasion, but proper preventive maintenance on your servers can minimize the likelihood of failure.Continue Reading

• How to solve logical volume management issues

  Excluding certain Logical Volume Manager (LVM) devices from startup scans and the manual activation of logical volumes are two pesky logical volume management issues. Find out how to resolve them.Continue Reading

• Using cryptography on the mainframe: An amateur's guide

  Cryptography on the mainframe protects sensitive data and aids organizations' compliance to security regulations such as the Payment Card Industry Data Security Standard. This tip discusses the hardware and software available for cryptography on the...Continue Reading