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Many people use SSH to log in to remote machines, copy files around, and perform general system administration. If you want to increase your productivity with SSH, you can try a tool that lets you run commands on more than one remote machine at the same time. Parallel ssh, Cluster SSH, and ClusterIt let you specify commands in a single terminal window and send them to a collection of remote machines where they can be executed. Why you would need a utility like this when, using openSSH, you can create a file containing your commands and use a bash for loop to run it on a list of remote hosts, one at a time? One advantage of a parallel SSH utility is that commands can be run on several hosts at the same time. For a short-running task this might not matter much, but if a task needs an hour to complete and you need to run it on 20 hosts, parallel execution beats serial by a mile. Also, if you want to interactively edit the same file on multiple machines, it might be quicker to use a parallel SSH utility and edit the file on all nodes with vi rather than concoct a script to do the same edit. Many of these parallel SSH tools include support for copying to many hosts at once (a parallel version of scp) or using rsync on a collection of hosts at once. Because the parallel SSH implementations know about all the hosts in a group, some of them also offer the ability to execute a command "on one host" and will work out which host to pick using load balancing. Finally, some parallel SSH projects let you use barriers so that you can execute a collection of commands and explicitly have each node in the group wait until all the nodes have completed a stage before moving on to the next stage of processing.

With so many browser out there in the wild, working as a Web Developer certainly is not an easy job these days. Thankfully, over the last years, decent tools have been developed by bright people that make developing and debugging of code easier for the developer. But sometimes, it is not easy to keep track which tools are at a Developer’s disposal (and which are actually usable). The following article seeks to list the best tools available and quickly describing how to activate/install/use them.

reviews of 26 powerful tools you can use to make Twitter do all kinds of groovy things

7个Wordpress反垃圾信息的工具 1、Akismet 2、Bad Behavior 3、Defensio.com 4、Simple CAPTCHA 5、Simple Trackback Validation 6、Spam Karma 2 7、WP Spam Hitman

1、服务稳定 2、速度快 3、简单实用 4、实时统计 5、RSS 统计支持 6、界面清新 7、个性化 8、使用方便 9、数据权威 根据以上9条分析当下主流的统计工具

Check out 101 ways that you can earn money from your blog and learn strategies for using these tools and methods in a way that's reader-friendly. 文章总结了101种通过blog 赚钱的同时另读者觉得友好的各种工具和策略方法。

TOP 100 TOOLS FOR LEARNING 2007 By Popularity

Here are some of the best free MySQL tools out there. The description is not my review of the product, it is just what the developers say about their tools. If you know some other good ones, you can drop a comment.

I've compiled this list of Twitter programs, clients, scripts, and web sites that take Twitter even further.

huge number of Twitter-related tools and mashups has been impossible to ignore. Instead of writing a new entry every time a new one appears, it’s much more convenient for the readers it they’re all in one big categorized list. *note: this list will be

All Things Web 2.0 - An Open Directory For All Things Web 2.0 - a SacredCowDung.com Open Portal Project