I am reading a university, Linux thief fire, if you don't have a redhat or Mandrake in your hard disk, everyone is embarrassed. At that time, I feel that the MP3 with XMMS is better than WinAmp. In order to load my Yamaha card on RedHat5.1, I will reload 20 times. One year in order to learn from Linux in the school, several buddies have not returned home. Everyone in the New Year's Eve, only a bowl of face. It's not duty, but there is no open restaurant within 500 meters in the school. I think of it now, I am a little strange, why not prepare a little food? Later, I thought it was everyone who stayed up late. I slept during the day. I didn't want to go out at night; I've wanted to save money to buy some Linux books. At that time, the network resources were not rich. The next consequence is to start the first structure of the chemistry. I directly fainted under the desk. Not easy! And Redhat has always used Redhat, from 6.2 to 7.x to 8.0, all the way to 9.0.6.2 is the most stable version, and later upgrade is too fast, there is nothing impression. It is a end of 9.0 because Redhat has announced no longer supporting and developing a free Redhat Linux version, which will be placed in the development and application of Enterprise Linux (Enterprise Linux). In the first half of last year, 9.0 also stopped maintenance. See here. The company's product line depends on Linux, although it can be ported to As, but if you don't pay back, and use Windows, piracy. So until now, install or use 9.0 to the customer. 9.0 Just launched, Sun's J2SDK new version 1.4.2 was also released at that time. Sun's JDK's performance under Linux is a human disease, and it is indeed, it is too much better than in Windows. 9.0 Just launch a new thread library, named Native Posix Thread Library (NPTL), SUN said 1.4.2 Probably Optimization of NPTL will greatly improve the performance of JDK. See http://java.sun.com/developer/technicalArticles/javatechandlinux/redhat/, doing a not small propaganda. English is not good, not well. I didn't catch a cold, especially Intel and AMD sent crazy to improve CPU frequencies. However, Redhat9 J2SDK1.4.2 This SUN propaganda gold combination is a year ago, it makes me a bitterness. The cause is that there is a background thread in the company system, and several working threads will be launched every specified time. Since I upgraded the company's system to RedHat9 and J2SDK1.4.2, the strange thing appeared, did not worry about one or two, the thread did not work. Without any error message, it didn't respond. Thought whether memory leaks, carefully examined the code, the close of the close, and no OutofMemoryError appeared. I have only KillaAll -9 Java and then restart. At that time, I experienced sun and redhat, I would like to understand the same procedure, and the upgrade to the new version is still evil. I know that it is an upgrade problem, which is a headache, I don't know where the problem is. No one has encountered a similar problem online. Later, I found the clue from the redhat bugzilla, see https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=90301.