Living in the “information highway” era, we must all connect our computers to the Internet to be able to send e-mail, read newsgroups, browse the Web and communicate with the world in general.
Configuring your machine to connect to the Internet via your ISP can be an easy or difficult process, depending on your choice of operating system and tools.
Since Linux is our platform of choice, we are left to select the tools to use. Using X-ISP to configure our machine insures that we can connect our Linux boxes to the Internet in a short time, without any problems and with the advantage of using an X-based interface.
X-ISP is a visual, X11/XForms-based, user-friendly interface to pppd/chat. It offers an X11 dialup networking tool that can also act as a small ISP and phone company (PTT) database manager, and also as a tool to log dialup costs and usage. In addition to that, it provides maximum feedback from the dialing and login phases on a message browser (Figure 1), versatility in interrupting a call in progress, a manual login terminal window as well as call-back and DNS server selection capabilities.
The user interface of X-ISP is very simple, intuitive and user friendly. It consists of a form with four buttons (Connect, Interrupt, Disconnect and Quit), three menus (Options, Logging and Help) and a drop-choice list of ISP entries (in case the user wants to configure the machine to dial more than one ISP). The “Options” menu contains the five items discussed below.
Information: The user can create ISP entries, set the default ISP, set auto-dial and re-dial on disconnect options and the authentication protocol (none, PAP, PAP-Secrets or CHAT-Secrets). In Figure 2, X-ISP is configured to connect to any of the three ISPs: Cyberia, Data Management or IncoNet (actual ISPs in Lebanon) with Cyberia as the default ISP.
Dialing and Logging: From the dialing and logging window, the user controls several options such as the Dialer Options (number of maximum dialing trials, inter-dialing delay, maximum wait time for connection to be established, etc.), and the Manual and Automatic Logging options. The script section, for both dial-in and call-back, is divided into Expect and Send sections, as used by the call to the chat command. Here, the user must enter the script lines employed by chat to negotiate a successful login for the particular ISP.
Communication Options: These control the settings of the modem device and its properties (Reset and Init strings, baud rates and flow control), dialing method and asyncmap, software compression, serial port baud rate and flow control. All of these options have an initial default value.
TCP/IP Options: controls the settings of dynamic local and remote addresses, netmask and DNS.
Paths Setup: enables editing the paths to the pppd daemon, the location where pppd saves its process ID files, the chat utility, the xispdial and xispterm utilities, and where XISP will keep the named pipe node used for communicating with its components.
The “Logging” menu contains the following two items:
PTT Editor: This form enables editing of phone company information maintained by X-ISP. The user can add his local phone company to the compiled list and set up its rates. This way, when the user retrieves on-line statistics, he will receive a report of the actual cost.
Statistics: This displays time/cost information and also makes a bar chart of costs for each period (weekly, monthly and bimonthly).
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.
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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