Linux servers
Top Stories
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Tip
05 Nov 2021
These Posh-SSH examples pave the way to Linux management
Need to work with remote Linux systems? A PowerShell module with file-handling functionality can help Windows shops looking for a reliable management platform. Continue Reading
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Tip
28 Sep 2021
An introduction to using diff and patch together
Use the diff command in Linux to discover subtle differences between code files. Then, use the patch command to update those code files to match. Continue Reading
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Tip
02 Aug 2010
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
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News
18 May 2010
Oracle announces new Sparc-based hardware
Oracle has announced a new blade chassis and server for its Sun Netra servers, highlighting the company's push into data center hardware even as it deemphasizes Sun's x86 commodity servers. Continue Reading
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Tip
31 Mar 2010
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 These can include passwords, PHP code injection, weak file and directory permissions and outdated Apache and PHP versions.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 what to look for and how to fix it. Continue Reading
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Tip
23 Mar 2010
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
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Tip
22 Mar 2010
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
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Tip
15 Feb 2010
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
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Tip
07 Oct 2009
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
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Tip
27 Aug 2009
Troubleshooting Logical Volume Manager boot problems
If Logical Volume Manager (LVM) boots incorrectly, logical volumes are inaccessible and you can't manage server disk space. In this LVM how-to, we offer some simple steps to troubleshoot boot issues with LVM. Continue Reading
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Tip
08 Jul 2009
Comparing Unix versions: AIX, HP-UX and Solaris
In this comparison of the top Unix versions, learn what distinguishes the file systems, management tools and virtualization products in Sun Solaris, Hewlett-Packard HP-UX and IBM AIX file systems. Continue Reading
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Tip
24 Jun 2009
How to install and use RRDTool to speed up MRTG monitoring
When monitoring a large number of hosts or devices with the MRTG graphing tool, the system experience frequent CPU spikes. In this RRDTool tutorial, learn how to install RRDTool and convert MRTG to use RRD storage to avoid system overload. Continue Reading
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Tip
17 Jun 2009
Troubleshooting Linux boot problems
If your Linux server fails to show the login screen at startup, you have a boot problem. Learn some tricks on how to diagnose and fix a Linux server boot problem from Grub failure to init and runlevels. Continue Reading
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Tip
10 Jun 2009
How to install and configure MRTG, an essential sys admin tool
Multi Router Traffic Grapher (MRTG) is an essential tool that allows systems administrators to monitor and graph network traffic and more. In this tutorial, an expert explains how to install and configure MRTG on Solaris 10. Continue Reading
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Tip
06 May 2009
Capacity planning tools tutorial for Linux and Unix
Effective capacity planning is a proactive way of ensuring that your data center servers will not prematurely run out of space or horsepower. Learn the tools available to help you, both native to Linux and Unix platforms including Solaris, Red Hat, HP-UX, and the free-form products that will work with any Linux or Unix distribution. Continue Reading
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Tip
31 Oct 2008
Repairing SUSE Linux Enterprise Server using a Rescue CD
SUSE Linux Enterprise Server offers a Rescue CD for repairing the system if your hardware causes a crash at reboot. This tip shows you how to use it. Continue Reading
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Tip
31 Oct 2008
Ensuring server time synchronization with NTP on SLES
Synchronize your SUSE Linux Enterprise Server times using NTP time server. Two servers are recommended for enterprise situations, as redundancy will save the day in case of a disaster. Continue Reading
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Tip
30 Sep 2008
How to troubleshoot RHEL performance bottlenecks
This tip provides a step-by-step approach to application-tuning, troubleshooting bottlenecks and enhancing performance on RHEL 5 systems. Continue Reading
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Tip
19 Aug 2008
Using OpenSSL to create and manage certificates
Establishing an independent certificate authority with OpenSSL enables you to create public key certificates and to verify that these public keys are authentic and that email messages are secure. Continue Reading
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Definition
04 Aug 2008
gzip (GNU zip)
Gzip (GNU zip) is a free and open source algorithm for file compression. The software is overseen by the GNU project.... (Continued) Continue Reading
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Definition
22 Jul 2008
DRBD (Distributed Replicated Block Device)
DRBD (Distributed Replicated Block Device) is a Linux-based software component that facilitates the replacement of shared storage systems by networked mirroring. DRBD makes it possible to maintain consistency of data among multiple systems in a network. DRBD also ensures high availability (HA) for Linux applications... (Continued) Continue Reading
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Tip
21 May 2008
Are you prepared for the Unix 2038 problem?
All 32-bit Unix/Linux-based systems store the system clock time internally as the number of seconds since the "Epoch." The latest time and date that can be represented as seconds-since-the-Epoch in that 32-bit signed integer is 3:14:07 UTC on Tuesday, January 19, 2038. Current applications will interpret the negative number that is subsequently produced as an older year (1901), or will freeze the system clock at 03:14:07 on 1/19/2038, causing applications and operating systems to fail. Bill Bradford explains some options for preventing this eventuality. Continue Reading
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Tip
08 Jan 2008
Oracle on RHEL 5: Installation and configuration
Install and configure Oracle 10 on RHEL 5. This tip shows how to set up a database with Oracle's Database Configuration Assistant (DBCA) and Oracle Enterprise Manager. Continue Reading
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Tip
19 Nov 2007
SUSE Linux Enterprise troubleshooting: Fixing boot problems by repairing a broken initrd
Having a problem booting SUSE Linux Enterprise on your server? It may be that you have a problem with your initial RAM disk. Expert Sander van Vugt troubleshoots the problem with this step-by-step guide to fixing a broken initrd. Continue Reading
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Tip
17 Jul 2007
Setting up SSH2 on Red Hat Enterprise Linux
Find out how to set up SSH2 (Secure Shell) on Red Hat Enterprise Linux (RHEL), using encryption keys instead of passwords in this tutorial. You can use this with either RHEL 4 or RHEL 5. Continue Reading
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Tip
02 Jul 2007
Dual booting vs. virtualization: Using Windows and Linux on the same server
Interoperability between Linux and Windows can be achieved in two ways: one, by installing each operating system separately via dual booting -- which allows both operating systems to run on the same hardware -- and two, by running one system inside another with virtualization. In this tip, Serdar Yegulalp explains when to use each option. Continue Reading
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Answer
22 Jun 2007
Alert vs. log in the Snort /var/log/snort directory
A Linux security expert explains that the difference between the Snort alert and log logs in the Snort /var/log/snort directory is based on how rules are written. Continue Reading
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Tip
19 Jun 2007
HP UNIX performance monitoring fundamentals
UNIX system performance monitoring involves more than just keeping an eye on the amount of free space or the number of users who are logged in. With the right system performance monitoring know-how, you can look into various files to find out anything about the system. Continue Reading
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Tip
18 Jun 2007
OpenOffice 2.0 tutorial: Using SQL View, Query Design and more with Report Writer
Learn how to use the Query Design and SQL View tools, handle report-specific fields, print fast reports and more in this tutorial on OpenOffice's Report Writer. Continue Reading
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Tip
09 Apr 2007
Linux clusters vs. grids
Can Linux clusters outperform grid computing? Expert Ken Milberg compares them -- covering Beowulf, HPC, Linux Virtual Server and the Globus Toolkit for grids -- and chooses a winner. Continue Reading
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Answer
27 Mar 2007
MySQL full outer join workaround
A MySQL expert offers a workaround for the lack of syntax support for full outer joins. Continue Reading
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Tip
09 Jan 2007
Running Windows as a VM on Linux with VMware Server
If you don't want to spend money on an expensive Citrix setup for running Windows and Linux, then try running Windows as a virtual machine (VM) on Linux with VMware Server. Continue Reading
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Tip
02 Jan 2007
Migrating Microsoft Internet Information Server to Apache on Red Hat Linux
If you're moving to Apache server from Microsoft Internet Information Server, be aware that this migration involves more than just copying files. In this tip, users will learn how to move a site from IIS to Apache on Red Hat, although this is applicable to other Linux distributions. Continue Reading
- Answer 28 Oct 2005
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News
04 Aug 2005
Why management has been easier on Windows, Unix
Levanta CEO Matt Mosman previews his firm's new Linux management appliance and explains why he thinks Linux has lagged behind the competition in the realm of server management. Continue Reading
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News
05 May 2005
Potential common ground for Windows, Unix and Linux
The ability to manage network directories across operating system platforms may help remove some of the barriers between competing factions within IT shops. Continue Reading