Archive for the 'Monitoring' Category
- Tcpdump Recipes: Howto and tutorials
Tcpdump displays out the headers of packets on a network interface that match the given criteria. You can dump traffic on a network and analysis problems.
This guide provides some good examples:
Tcpdump is the premier network analysis tool for information security and networking enthusiasts and/or professionals. In my own primer I cover tcpdump basics; if [...] - Linux hard drive benchmark & bottleneck testing software suite for performance
The stress test of hardware (hard drive benchmarks) is a simplistic test. There are a number of benchmarking applications software that can be used as hard disk (storage) stress testing. My favorite is Bonnie++ software.
From the project home page:
Bonnie++ is a benchmark suite that is aimed at performing a number of simple tests of hard [...] - Monitor and restart Apache or lighttpd webserver when daemon is killed
When you cannot monitor your server for service availability, it is better to take help of automated monitor and restart utility. Last 4 days I was away from my server as I was enjoying my vacation. During this time due to load my lighttpd webserver died but it was restarted automatically within 2 minutes. I [...]
- Essential tools for monitoring and administrating MySQL Server
The MySQL distribution provides several tools for database developers and administrators, but they don’t always work everywhere. Fortunately, the worldwide MySQL community has produced plenty of useful tools. Baron Schwartz surveys the possibilities and offers suggestions for what you should use.
At some point I have used most of these tools:
Tools to Monitor Queries and Transactions
=> [...] - How Install and setup a honeypot
Honeypot is a computer system set up as a trap for computer attackers. If intruders are always scanning the Internet for potential victims and they are can you find the intruders and their exploits by putting up fake networks that only a deliberate scan could find? That’s the theory behind honeypots. Peter Mikhalenko discusses the [...]
- Force iptables to log messages to a different log file
According to man page:
Iptables is used to set up, maintain, and inspect the tables of IP packet filter rules in the Linux kernel. Several different tables may be defined. Each table contains a number of built-in chains and may also contain user defined chains.
By default, Iptables log message to a /var/log/messages file. However [...] - Linux remote access with minicom and conserver how-to
Paul Virijevich show us howto improve server management with Minicom and conserver software.
With all of the redundancy in today’s servers, its easy to think that you will never need serial port access to your shiny new server. But what do you do when you’re at home and your server is at the data center, and [...] - Howto: Linux kill and logout users
Yet another newbie question that suggests people love to kill and show their power to rest of the world
There is a package called procps. It includes various useful (read as nifty) utilities. One of such utility is skill which is responsible to send a signal to users and process such as:Halt user terminal
Kill [...] - Confessions of a Real-World Linux Admin: “I Always Login As Root.”
This is not funny but it is a hard reality. Many new sys admin prefer to login as root.
FTA, “There are over ten million businesses in America that support fewer than 20 employees, each. Many are start-ups or otherwise minimally capitalized, and Linux fills a networking need without straining the budget… especially when they [...] - How to solve web performance problems with the RRDtool
Sean Walberg shows us how to measure and display data easily to pinpoint the source of problems with the RRDtool.
FTA, “…Examine how to determine the root cause of Web performance problems. Without proper measurement, how do you know whether your Web application is performing well? By using open source tools such as the RRDtool, you [...]
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