flyinweb's blog

 H

ow do I increase the maximum number of open files under CentOS Linux? How do I open more file descriptors under Linux?

The ulimit command provides control over the resources available to the shell and/or to processes started by it, on systems that allow such control. The maximum number of open file descriptors displayed with following command (login as the root user).

 Q. How do I make changes to /proc filesystem permanently? For example I want to se fs.file-max to 65536, I can use command echo "65536" > /proc/sys/fs/file-max. But, after rebooting my Linux server this value will be reset to the default. How do I make it permanent?

 在类Unix系统中可以使用top查看系统资源、进程、内存占用等信息。查看网络状态可以使用netstat、nmap等工具。若要查看实时的网络流量，监控TCP/IP连接等，则可以使用iftop。

 While administrating a box, you may wanted to find out what a processes is doing and find out how many file descriptors (fd) are being used. You will surprised to find out that process does open all sort of files:

=> Actual log file
=> /dev files
=> UNIX Sockets
=> Network sockets
=> Library files /lib /lib64
=> Executables and other programs etc

Introduction

This tutorial is a beginners handbook for new Linux users / Sys admins and school students studying Linux or computer science. This book is licensed under"Creative Commons Attribution Noncommercial Share Alike 3.0 Unported".

 dmidecode是一个信息转换工具，能把系统中的硬件信息输出为友好的可读性的信息展现给我们；

shell how to主要收集在shell使用过程中遇到的经典案例，或疑难实现以及shell使用技巧等。

This tutorial describes how you can install Apache2 with mod_fcgid and PHP5 on Fedora 13. mod_fcgid is a compatible alternative to the older mod_fastcgi. It lets you execute PHP scripts with the permissions of their owners instead of the Apache user.