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The largest consider a company's choice to compliment Linux is overcoming thesupport matters. Adopting Linux effectively ability taking up a differentapproach to aid. when you consider that Linux is open resource, there are assorted methodsto get the aid that businesses desire. This contains deeper abilities on how toinvestigate difficulties, easy methods to get support from the open resource neighborhood (i.e.how to invite for assistance on usenet) and the way to solve difficulties in-house withoutthe additional rate of a expert. This ebook will be a vital a part of everycompany's Linux adoption plan to maintain the entire price of possession (TCO)down and enhance the ROI in their Linux process. it's also a booklet thatadvanced Linux pros operating their very own Linux structures might be capable touse to troubleshoot. This e-book supplies the employees the fundamentals they should diagnose so much difficulties that they are going to face and should pass into the nitty-gritty at the hardest difficulties. It additionally issues clients to the best assets in order that they might get support speedy.
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Additional resources for Self-Service Linux(R): Mastering the Art of Problem Determination
Sample text
For this reason, there is more information on the data collection script in Appendix B, “Data Collection Script” (for the readers who support or use Linux in a business setting). Do not underestimate the importance of doing an initial investigation on your own, even if the information you need to solve the problem is on the Internet. You will learn more investigating a problem on your own, and that earned knowledge and experience will be helpful for solving problems again in the future. That said, make sure the information you learn is in an area that you will find useful again.
This is where the strace and ltrace tools can help out. Fig. 3 Basic investigation for error symptoms. Many types of errors are related to the operating system, and there is no better tool than strace to diagnose these types of errors. Look for system calls (in the strace output) that have failed right before the error message is printed to the terminal or logged to a file. You might see the error message printed via the write() system call. This is the system call that printf, perror, and other print-like functions use to print to the terminal.
If more memory is added to the system and applications start to fail, it could be the result of bad memory. For example, gcc is one of the tools that tend to crash with bad memory. ☞ Changes in workload (that is, more users suddenly going to a particular Web site) may push the system close to the limit of its resources. Increases in workload can consume the last bit of memory, causing problems for any software that could be running on the system. One of the best ways to detect changes to the system is to periodically run a script or tool that collects important information about the system and the software that runs on it.