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RSS订阅转载 tomct启动过程 bootstrap catalina
Tomcat中各个组件的生命周期是由server控制的。那么server的生命周期由谁控制呢？ 我们先来看下使用脚本启动tomcat的时候，首先会发生什么。java应用要运行，需要一个main方法。tomcat启动的时候调用的是bootstrap中的main方法。01/**02 * Main
2013-07-22 08:32:04
959
转载 How to verify ntp service properly or not in linux/unix
This article is all about verifying that your NTP setup is working properly. Normally I use some monitoring tool like nagios to monitor NTP status and alert me if time on my server goes out of sync. H
2013-07-13 21:50:26
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转载 Basics of telnet and http
Basics of telnet and HTTPSay you want to request a webpage… Normally, one would use a web browser, right? But sometimes you just need to see what is really going on… In this blog post I will sh
2013-07-06 00:12:52
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转载 Linux之RHEL6的开机流程分析
开机——很多人觉得很简单的事情，只要按下电源开关，然后系统就会自然启动，没有什么需要学习的。其实不然，如果系统没有什么问题，可以正常登陆的时候，当然开机很简单。但更多的时候，我们需要知道当机子不能正常开机的如何解决，这才是我们学习的目的。那么我们就来分析一下Linux的开机流程简单来说，系统开机的过程可以汇整成下面的流程：1.加载BIOS的硬件信息、进行自我测试，并依据设定获得第一
2013-05-26 12:40:47
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转载 Configure Shared Storage for Redhat Linux Servers using iSCSI Technology
Networking between Target and Initiator Nodes:Edit '/etc/hosts':Edit '/etc/hosts' of both the iSCSI Target(SAN) and iSCSI Initiator(RACNODE1) and add the following entries:192.168.15
2013-05-22 14:24:26
825
转载 Linux NFS服务器的安装与配置
一、NFS服务简介 NFS 是Network File System的缩写，即网络文件系统。一种使用于分散式文件系统的协定，由Sun公司开发，于1984年向外公布。功能是通过网络让不同的机器、不同的操作系统能够彼此分享个别的数据，让应用程序在客户端通过网络访问位于服务器磁盘中的数据，是在类Unix系统间实现磁盘文件共享的一种方法。 NFS 的基本原则是“容许不同的客户端及服务端
2013-05-21 17:31:20
541
转载 Disk Quotas
Disk Quotas: This feature of Linux allows the system administrator to allocate a maximum amount of disk space a user or group may use. It can be flexible in its adherence to the rules assigned and i
2013-05-17 07:43:47
887
转载 Checking a server’s SSH host fingerprint with the web console
Before you dismiss that error message about your server’s SSH host key changing, follow this simple procedure to make sure all is as it should be.Explaining the host keyOne of the fundamen
2013-05-06 09:01:20
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转载 Apache HTTP Server 与 Tomcat 的三种连接方式介绍
简介： 整合 Apache Http Server 和 Tomcat 可以提升对静态文件的处理性能、利用 Web 服务器来做负载均衡以及容错、无缝的升级应用程序。本文介绍了三种整合 Apache 和 Tomcat 的方式。首先我们先介绍一下为什么要让 Apache 与 Tomcat 之间进行连接。事实上 Tomcat 本身已经提供了 HTTP 服务，
2013-04-23 09:59:27
526
转载 How to Install Apache 2.4.2 from Source on CentOS 6.2 with SSL
http://www.thegeekstuff.com/2012/05/install-apache-2-on-centos-6/f you try to follow the how to install Apache with SSLarticle that we discussed a while back, you’ll face an issue during “make”
2013-04-19 11:53:11
1045
转载 CentOS reset root password
You forgot your root password. Nice work. Now you'll just have to reinstall the entire machine. Sadly enough, I've seen more than a few people do this. But it's surprisingly easy to get on the machine
2013-04-09 09:17:08
917
转载 iptables usage
1. Delete Existing RulesBefore you start building new set of rules, you might want to clean-up all the default rules, and existing rules. Use the iptables flush command as shown below to do this
2013-04-07 22:48:38
655
转载 tcpdump usage
tcpdump command is also called as packet analyzer.tcpdump command will work on most flavors of unix operating system. tcpdump allows us to save the packets that are captured, so that we can use it
2013-03-31 22:05:22
744
转载 Log file and logwatch
Chapter 4. Analyzing and Managing System Log Files¶Contents4.1. System Log Files in /var/log/4.2. Viewing and Parsing Log Files4.3. Managing Log Files with logrotate4.4. Monitoring Log Files w
2013-03-26 09:54:14
757
转载 Top 30 Nmap Command Examples For Sys/Network Admins
by NIXCRAFT on NOVEMBER 26, 2012 · 8 COMMENTS· LAST UPDATED DECEMBER 11, 2012in COMMAND LINE HACKS, HOWTO, NETWORKING, SECURITYNmap is short for Network Mapper. It is an open sourc
2013-03-26 09:28:20
1138
转载 screen
sing Linux Screen for Session ManagementLost your shell connection? Need multiple shell sessions?You are logged into your remote server via SSH and happily plucking along at your keyboard and
2013-03-17 23:27:49
824
转载 linux NFS suage
These are systems administration type tasks and must be done as root (su - to root, or sudo) http://www.wikihow.com/Share-Files-Between-Linux-Computers-Using-NFS http://tldp.org/HOW
2013-03-15 19:41:42
798
转载 LINUX下多路径（multi-path）介绍及使用
一、什么是多路径普通的电脑主机都是一个硬盘挂接到一个总线上，这里是一对一的关系。而到了有光纤组成的SAN环境，或者由iSCSI组成的IPSAN环境，由于主机和存储通过了光纤交换机或者多块网卡及IP来连接，这样的话，就构成了多对多的关系。也就是说，主机到存储可以有多条路径可以选择。主机到存储之间的IO由多条路径可以选择。每个主机到所对应的存储可以经过几条不同的路径，如果是同时使用的话，I/O
2013-03-14 11:56:04
7127
转载 Add new disk via LVM in linux
An Overview of Logical Volume Management (LVM)LVM provides a flexible and high level approach to managing disk space. Instead of each disk drive being split into partitions of fixed sizes onto whi
2013-03-13 22:11:08
1053
转载 How to add new partition in centos
Mounted File Systems or Logical VolumesThere are two ways to configure a new disk drive into a CentOS system. One very simple method is to create one or more Linux partitions on the new drive, c
2013-03-13 16:24:48
1194
转载 X Over SSH2 - A Tutorial
Introduction:Have you ever wanted to run a graphical application securely and remotely with Linux or Unix? How about from a Microsoft Windows PC to a Linux/UNIX host? This tutorial is about X, S
2013-03-12 09:11:30
1636
转载 mod_jk vs mod_
Apache Tomcat mod_jk Connector Configuration Made SimpleIn this article, we provide a comprehensive overview of the Apache mod_jk connector, including configuration information, use scenarios, s
2013-03-07 11:07:01
635
转载 Understanding Tomcat Connectors http vs ajp
Connector elements are Tomcat's links to the outside world, allowing Catalina to receive requests, pass them to the correct web application, and send back the results through the Connector as dynami
2013-03-06 14:00:43
855
转载 正向代理 反向代理
套用古龙武侠小说套路来说，代理服务技术是一门很古老的技术，是在互联网早期出现就使用的技术。一般实现代理技术的方式就是在服务器上安装代理服务软件，让其成为一个代理服务器，从而实现代理技术。常用的代理技术分为正向代理、反向代理和透明代理。本文就是针对这三种代理来讲解一些基本原理和具体的适用范围，便于大家更深入理解代理服务技术。一、正向代理(Forward Proxy)一般情
2013-03-06 12:36:26
573
转载 perl check_jmxProxy tomcat
Monirot#check_jmxproxy## Contacts a JMX proxy (like that which Apache Tomcat provides)# and compares the return value to the warning and critical values# provided as parameters to this script.#
2013-03-03 12:38:31
424
转载 grep practise
First create the following demo_file that will be used in the examples below to demonstrate grep command.$ cat demo_fileTHIS LINE IS THE 1ST UPPER CASE LINE IN THIS FILE.this line is the 1st low
2013-03-02 09:36:19
435
转载 How to Install RSyslog+MySQL with LogAnalyzer on CentOS
Gathering information message is important on Data Center, in some situations you’ll want to store all entries of logfiles on another server. If a server crashes or gets hacked it will be able to trac
2013-03-01 07:31:28
639
转载 DNS Queries & Resolution Process and Response
IntroductionThis section will help you understand how the DNS queries work on the Internet and your home network. There are two ways to use the domain name system in order to resolve a host or dom
2013-02-27 17:01:21
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转载 Bash Scripting and Nagios plugin
ntERLab at AIT: Network Management WorkshopPart 1: Create a a Nagios Plug-in Part 2: Set Up Nagios Notification for our New Plug-in Part 3: Update Our Plug-in for any Number of Hosts
2013-02-16 15:36:56
434
转载 nagios python template
Python Nagios Plugin TemplateArchivado en: python, nagios — Etiquetas: python, bash — Ruben @ 11:51This is a very simple nagios plugin template.Just run it this way:$ python template.p
2013-02-15 15:42:03
733
转载 witre nagios plugin with python
Our Solarwinds Network Performance Monitor has a problem rendering custom reports on occasion. For something like that, there isn't an existing plugin for Nagios. Writing these plugins is easy. All th
2013-02-15 15:39:40
492
转载 Remotely monitor servers with the Nagios check_by_ssh plugin
Takeaway: If you are using Nagios to monitor remote servers, you have more than one method to execute checks, including the use of the check_by_ssh plugin. Vincent Danen tells you how to set up this
2013-02-10 18:30:06
659
转载 nagios remote monitoring nrpe vs ssh
We use Nagios to monitor quite a few (~130) servers. We monitor CPU, Disk, RAM and a few other things on each server. I've always used SSH to run the remote commands, purely because it requires little
2013-02-10 15:05:21
574
转载 linux 技巧：使用 screen 管理你的远程会话
你是不是经常需要 SSH 或者 telent 远程登录到 Linux 服务器？你是不是经常为一些长时间运行的任务而头疼，比如系统备份、ftp 传输等等。通常情况下我们都是为每一个这样的任务开一个远程终端窗口，因为他们执行的时间太长了。必须等待它执行完毕，在此期间可不能关掉窗口或者断开连接，否则这个任务就会被杀掉，一切半途而废了。元凶：SIGHUP 信号让我们来看看为什么关掉窗口/断
2013-02-08 20:53:41
329
转载 How to change screen resolution in redhat
look for a section called Screen in /etc/X11/xorg.conf, which will have a line likeCode:Mode"800x600" "600x480"change it toCode:Mode "1024x768" "800x600"4) save the file and restart
2013-02-05 09:37:39
360
转载 Install nagios on linux
http://assets.nagios.com/downloads/nagioscore/docs/Installing_Nagios_Core_From_Source.pdf-----------------------------------The Industry Standard in IT Infrastructure MonitoringPurposeThis d
2013-01-21 11:36:20
395
转载 Ethernet versus ATM
TM has been seen as the ultimate networking technology that will allow true broadband networking for the future. At the time ATM was introduced, it was generally estimated that it is just a matter o
2013-01-18 10:21:52
972
转载 md5sum
md5sum [OPTION]... [FILE]... [功能] linux 下 shell命令 ，制作md5码 也用于软件的md5校验[描述] MD5算法常常被用来验证网络文件传输的完整性，防止文件被人篡改。MD5 全称是报文摘要算法（Message-Digest Algorithm 5），此算法对任意长度的信息逐位进行计算，产生一个二进制长度为128位（十六进制长度就
2013-01-17 11:56:09
557
转载 SNMP（MIB（OID）& SMI & SNMP）
Simple Network Management Protocol (SNMP) is an "Internet-standard protocol for managing devices on IP networks. It is used mostly in network management systems to monitor network-attached devices for
2013-01-16 14:30:00
1939
转载 RedHat / CentOS Install and Configure Cacti Network Graphing Tool
Cacti is a network graphing tool similar to MRTG. How do I install and configure common options to collect SNMP data and various other data (such as system load, network link status, hard disk space
2013-01-16 13:54:44
539
大学生社团互动平台改良版（ssh+ext+JFreechart+报表+mysql）
2009-09-12
大学生互动平台1（ssh+ext+jfreechart+部分报表功能）
2009-07-19
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