Copying a live file system can be risky, especially if there are open files. You should also be careful to ensure that you don't accidentally overwrite a partition, or existing files, with the files you are trying to copy. With some careful thought, you can effectively migrate files reliably to take advantage of more space, even on a live system.
Monitoring your file systems and ensuring they don't fill up is a vital process in the day-to-day management of your UNIX systems. This article looks at methods for keeping an eye on disk space, discovering which files, users, or applications are using up the most space, and how to make use of quotas and other solutions to find the information you need.
"UnixLite is a lightweight UNIX/Linux compatible operating system written in c++; it is open source and released under the GNU General Public License. The complete operating system is made up of a kernel and applications; just like Linux, UnixLite is only the kernel. The kernel itself is written from scratch and the biggest part is written in c++; however, the library used by UnixLite comes from uClibc and applicaitons running on UnixLite come from the GNU project."
The numbers in the Unix market may be flat, but Hewlett-Packard sees a bright future for its HP-UX operating system. The company this fall will release HP-UX 11i v3 - the first major revamp of the OS in three years - with enhancements in its virtualization and automation capabilities, according to Don Jenkins, vice president of HP's Business Critical Servers unit.
This chapter supplements currently available project management materials and books about application porting projects. Topics such as how to use formalized requirements processes, how to better communicate between software developers, and how to practice extreme project management are topics that modern-day project managers are already well informed of. However, because software development is not exactly the same as porting and migrating software, a gap exists in current publications—a gap that this chapter addresses.
"CUPS 1.2.0 is the first stable feature release in the 1.2.x series and includes over 90 new features and changes since CUPS 1.1.23, including a greatly improved web interface and 'plug-and-print' support for many local and network printers. For a complete list of changes and new features, please consult the 'What's New in CUPS 1.2' document."
Scale-with-rails compares Solaris Express to FreeBSD and then goes on to demonstrate the power of the Sun Niagara based T2000.
"Learn about using a UNIX system as a primary domain controller and file repository, including an anonymous, read-only shared area accessible by anyone with a Web browser. To be a good citizen on your local network, you need to integrate your favorite UNIX system with the networking features of client systems, generally running Windows XP or Mac OS X. This makes it easier for the users of those workstations to take advantage of the centralized authentication and storage facilities you can provide."
"Be nice to your computers and examine some general guidelines for tuning server performance. A computer is like an employee who does tasks for you - it's a good idea to keep from overburdening them. One way to keep this from happening is to carefully tune the processes that run on it. The UNIX nice command is useful for doing just that."
"Peer into the behavior of an application with truss. When an application doesn't work as expected, you typically look at application and system logs as a first recourse. But when logs don't help, UNIX provides a powerful set of tools that you can use to trace the application while it runs. Armed with these traces and a bit of knowledge about UNIX, you can easily solve your application problems."
During Hewlett-Packard's Business Critical Systems conference in Macau this week, executives described a recent offer by Sun Microsystems' boss Scott McNealy to merge Solaris with HP-UX as "almost laughable".
After receiving several comments to his November 2005 article on hating UNIX, David Chisnall offers his responses and further insight on his continuing disdain.
"One of the most novel and differentiating features of a UNIX system is its command line. With just a few keystrokes, including a bit of 'glue', you can use the command line to combine a finite set of UNIX utilities into innumerable, impromptu data transforms."
"Technology professionals have loosely used the term 'UNIX' since the first person had to explain the difference between the Berkeley and AT&T flavors, so it's not surprising to find as many UNIX standards as there are versions of the operating system. Peter Seebach wades through the wellspring of UNIX standards and sorts them out for you, concluding that the rumors of the death of UNIX are (as usual) greatly exaggerated."
"UNIX and Windows data-center market share remain neck-and-neck, according to most analysts, but many in IT perceive UNIX and Linux innovation as slowing to a crawl. We interviewed representatives from Apple, Hewlett-Packard, IBM, Novell, Red Hat, and Sun Microsystems who were eager to challenge that perception by highlighting areas in which their UNIX OSs are breaking new ground."
"There are key utilities, command line chains, and scripts that are used to simplify different processes. Some of these tools come with the operating system, but a majority of the Unix tricks come through years of experience and a desire to ease the system administrator's life. The focus of this article is on getting the most from the available tools and insight across a range of different UNIX environments."
"The Amadeus project was initiated by USL as a successor or alternative to UNIX. As well as SCO other industrial contributors include USL, Novell, Chorus Systemes, Unisys1, Fujitsu and Sequoia. Amadeus has existed as a labs project for many years with Unisys being the first to put it into production usage in their OPUS high end database server." Read more .
"Is Unix dead? My answer is no, it's not dead. As a matter of fact, I think I hear it laughing on its way to the bank. Fewer Unix systems are being shipped, but they're commanding a higher premium than ever. Unix still represents a $2 billion market, the largest operating-system market by far. Despite Windows Server recent gains, it still represents about $1.6 billion , when you're looking at operating system-only revenues. And Linux in terms of revenues represents one-tenth of what the good, gray Unixes combined represent. Granted the future belongs to Linux, but as a $2 billion market, is Unix dead?"
"UWIN or Unix for WINdows, is developed and released by AT&T Laboratories and David Korn - the creator of Korn shell. UWin basically consists of a set of tools and libraries which helps application developers compile and run Unix applications natively on windows. The tools include a complete shell (Korn Shell) for Windows which is bundled with all the command line tools you find in Linux/Unix."
A new study on the major players in the Unix server market has declared IBM the clear customer favorite and brought to light some serious issues with Sun Microsystems' product line. Most alarmingly for Sun, the company appears to have lost its cachet as the dominant Unix player and done so while alienating customers. Sun finished last in almost every one of the Gabriel Consulting Group survey's categories, spanning technology performance, customer satisfaction and software tools.