Need to monitor Linux server performance? Try these built-in command and a few add-on tools. Most Linux distributions are equipped with tons of monitoring. These tools provide metrics which can be used to get information about system activities. You can use these tools to find the possible causes of a performance problem. The commands discussed below are some of the most basic commands when it comes to system analysis and debugging server issues such as: Finding out bottlenecks. Disk (storage) bottlenecks. CPU and memory bottlenecks. Network bottlenecks.
netcat with its simple and yet incredibly powerful command line constructs has helped me innumerable times to validate TCP and UDP end to end connectivity
The Dude network monitor is a new application by MikroTik which can dramatically improve the way you manage your network environment. It will automatically scan all devices within specified subnets, draw and layout a map of your networks, monitor services of your devices and alert you in case some service has problems.
rsync hfsmode is a patch for rsync to enable recognition of Mac OS X HFS resource forks and Finder metadata, and to copy them to a remote filesystem. The destination system can be any OS and filesystem that supports rsync, so you can use rsync to archive Mac OS X files to servers running Linux, Solaris, et cetera.
This is the online home of Version Control with Subversion, a free book about Subversion, a new version control system designed to supplant CVS. As you may have guessed from the layout of this page, this book is published by O'Reilly Media.
RadialNet is a network visualization tool developed for Umit during the Google Summer of Code 2007. In Umit it's called UmitMapper. It consists in a graphical tool to illustrate the Nmap network mapping. You can see a video demonstration based on version 0.3 here.