Millions of pounds of space junk orbiting Earth: 4
Total man-made objects larger than 1cm in diameter, currently orbiting Earth: 110,000
Number of man-made objects currently being officially tracked: 8,927
Age in years of the oldest US-launched satellite, Vanguard I: 44
Age at which Vanguard I became space junk: 6
Thousands of orbiting fragments produced by a Pegasus rocket explosion in 1996: 300
Millions of adults who use the Net at home or work: 156
Percentage of the above who listen to internet radio: 16
Millions of dollars spent by IBM on a Linux-specific testing lab in New York: 1
Worldwide number of Linux users, in millions: 18
Percentage of Linux systems used as workstations: 61.42
Percentage of Linux systems used for programming: 43.65
Percentage of Linux systems used as mail servers: 23.37
Percentage of Linux systems used as web servers: 33.38
Percentage of Linux systems used as file servers: 24.64
Percentage of Linux systems used as firewalls: 23.51
Percentage of Linux systems used as DNS services: 17.6
Rank of Faroe Islands in number of Linux users as a percentage of whole population: 1
Rank of Finland in number of Linux users as a percentage of the entire population: 4
7-8: Wharton School of Economics, citing USA Today and Gartner3
9: International Business Machines Corp.
10-19: Linux Counter (counter.li.org)
Here's an interesting trend. A few months ago, Wal-Mart.com started selling cheap PCs equipped with no OS at all. Then they started selling the same boxes equipped with the new Lindows OS (which runs Linux and Windows apps). Now they've added a series of slightly more upscale models that run Mandrake Linux.
The Lindows models run $299-$599 (US). The bottom model has an AMD Duron 850MHz processor, 128MB memory and a 10GB hard drive. The top model has a 1.8GHz Pentium 4, 256MB DDR memory and a 40GB hard drive.
The Mandrake models run $391-$648 (US). The bottom model has an AMD Duron 900MHz processor, 128MB memory and a 40GB hard drive. The top model has an Intel 2.0GHz Pentium 4 processor, 256MB DDR memory and a 40GB hard drive.
None come with monitors. Those begin at $128.42 (US) for a 17" model with up to 1280 × 1024 resolution. Color printers start at $49.63 (US) for a Lexmark Z23.
Prices and models are from mid-July 2002.
Q1 Eric Allman wrote the original Sendmail program to allow users to exchange mail among what three networks at the University of California, Berkeley?
Q2 ^TO_ in a procmail recipe is short for what?
Q3 How do you expunge deleted messages in Mutt?
Q4 What was the first Mail Transport Agent (MTA) ported to Linux, and when did it occur?
Q5 D. J. Bernstein's Maildir structure for storing mail in directories uses what three subdirectories per mailbox?
Q6 The --send-keys option of Gnu Privacy Guard sends keys where?
Q7 Who has the world's longest .signature file?
A1 ARPANet, UUCP and the University's own BerkNet.
A2 Any header that specifies a recipient of the mail: To, Cc and Bcc, along with less common ones such as Apparently-To and Envelope-To.
A3 Use the sync-mailbox function, which is bound to the $ key by default.
A4 smail, which Ian Kluft ported in 1992.
A5 The three subdirectories are: new, for newly delivered mail not yet seen by the user's mailer; cur, for mail that the mailer has seen (but that still may be unread by the user); and tmp, for temporary files.
A6 To a keyserver, so that other PGP and GPG users can easily look up your key.
A7 James “Kibo” Parry. It contains two ASCII art representations of the Starship Enterprise, one ASCII art sword, a recommended reading list and much other fascinating material. At 993 lines, it exceeds the recommended four lines by a bandwidth-sucking 24,725%.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
Free to Linux Journal readers.Register Now!
- Stunnel Security for Oracle
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Managing Linux Using Puppet
- My +1 Sword of Productivity
- SUSE LLC's SUSE Manager
- Doing for User Space What We Did for Kernel Space
- Parsing an RSS News Feed with a Bash Script
- SuperTuxKart 0.9.2 Released
- Google's SwiftShader Released
- Non-Linux FOSS: Caffeine!
With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide