Archive for TAG : CentOS CentOS « Justin’s Tech Blog

Archive for TAG: CentOS

Howto Install Oracle Berkeley DB on Linux

Berkeley DB, Berkeley-DB, CentOS, Database, Db4, Db4Cursor, Db4Env, Db4Txn, General, ldconfig, Oracle, PHP, php_db4, php_dba

August 18, 2007 at 13:45:30 · Filed under Berkeley DB, CentOS, General

Berkeley DB是由美国Sleepycat Software公司开发的一套开放源代码的嵌入式数据库管理系统（已被Oracle收购），它为应用程序提供可伸缩的、高性能的、有事务保护功能的数据管理服务。

Berkeley DB为许多编程语言提供了实用的api接口，包括c、c++、java、perl、tcl、python和php等。所有同数据库相关的操作都由Berkeley DB函数库负责统一完成。

官方地址为：http://www.oracle.com/technology/products/berkeley-db/db/index.html

本文就先讲一下如何在CentOS下安装Berkeley DB数据库(其他系统类似)。

1、安装Berkeley DB

# cd /usr/local/src
# wget http://download.oracle.com/berkeley-db/db-4.6.18.tar.gz
# tar -zxvf db-4.6.18.tar.gz
# cd db-4.6.18
# cd build_unix

Berkeley DB默认是安装在/usr/local/BerkeleyDB.4.6目录下，其中4.6就是版本号，你也可以指定–prefix参数来设置安装目录。

# ../dist/configure --prefix=/usr/local/berkeleydb --enable-cxx

其中–enable-cxx就是编译C++库，这样才能编译Berkeley DB数据库的PHP扩展php_db4。

# make
# make install

# echo '/usr/local/berkeleydb/lib/' >> /etc/ld.so.conf
# ldconfig

这2句的作用就是通知系统Berkeley DB的动态链接库在/usr/local/berkeleydb/lib/目录。

至此，Berkeley DB数据库已经安装完成。

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MySQL集群(NDB)安装脚本

CentOS, Cluster, distributed, 集群, FreeBSD, MySQL, ndb, ndbinstaller, Ubuntu, 分布式, 数据库集群

August 8, 2007 at 09:00:57 · Filed under CentOS, FreeBSD, MySQL, Ubuntu

Jim Dowling为我们写了一个安装和管理MySQL集群(MySQL Cluster)的BASH脚本，支持安装本地集群和分布式集群，提问式的安装方式，非常方便，相信每个人都很容易上手。

http://www.jimdowling.info/ndbinstaller-trac/wiki/DetailedLocalhostInstall这里以图文的方式介绍了这个脚本的整个安装过程。

更多资料请访问：http://www.jimdowling.info/ndbinstaller-trac/

安装脚本下载(右键另存为)

wget http://www.jimdowling.info/ndbinstaller/ndbinstaller.sh
# or
svn co http://www.jimdowling.info/ndbinstaller/

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Find命令技巧

CentOS, exec, find, FreeBSD, shell, Ubuntu, xargs

June 28, 2007 at 12:49:57 · Filed under CentOS, FreeBSD, Ubuntu

find命令功能其实很强，针对某些特定条件的日志文件特别有效，下面列举几个技巧：

1.查找90天以前的文件，并用LS列出全名

# find /data/webdata -mtime +90 -type f -exec ls -l -h {} \;

2.查找修改时间超过90天的文件

# find /data/webdata -mtime +90

3.查找修改时间超过90天，并且不包含click_15和click_16目录的文件

# find /data/webdata -mtime +90 \( -path /data/webdata/click_15 -o -path /data/webdata/click_16 \) -prune -o -print

4.查找修改时间超过90天，并需确认删除

# find /data/webdata -mtime +90 -ok rm -R {} \;

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Upgrade SQLite2 to SQLite3

CentOS, FreeBSD, SQLite, sqlite2, sqlite3, Ubuntu

June 25, 2007 at 13:09:50 · Filed under CentOS, FreeBSD, SQLite, Ubuntu

很简单的一条命令：

sqlite2 mydb.db .dump | sqlite3 mydb-new.db

如果需要很多数据库，写个简单的脚本即可。

#!/bin/bash
#
# description: Upgrade SQLite2 to SQLite3
#
 
DBPATH="/data/db"
 
for oldfile in $(find ${DBPATH} -name "*.db"); do
        newfile="${oldfile}.bak"
        sqlite2 $oldfile .dump | sqlite3 $newfile
        mv -f $newfile $oldfile
        echo $newfile
        echo $oldfile

1 Comment »

CentOS 源

CentOS, yum

June 25, 2007 at 12:53:43 · Filed under CentOS

贴一下偶常用的源
1、FOR CentOS 4.4

[base]
name=CentOS-$releasever - Base
baseurl=http://mirror.be10.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4
 
#released updates 
[update]
name=CentOS-$releasever - Updates
baseurl=http://mirror.be10.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4
 
#packages used/produced in the build but not released
[addons]
name=CentOS-$releasever - Addons
baseurl=http://mirror.be10.com/centos/$releasever/addons/$basearch/
gpgcheck=1
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4
 
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=http://mirror.be10.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4
 
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://mirror.be10.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4
 
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib
baseurl=http://mirror.be10.com/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4

2 Comments »

自行编译安装PHP

CentOS, FreeBSD, General, lib64, libmysqlclient.so, MySQL, mysqlclient, PHP, PHP5, Ubuntu

June 25, 2007 at 12:45:48 · Filed under CentOS, FreeBSD, General, MySQL, Ubuntu

实际上这种文章已经很多了，网上也到处都是，之所以写这篇文章，目的是为了解决其中一个问题。

# cd /usr/local/src
# wget http://cn.php.net/distributions/php-5.2.3.tar.gz
# tar -zxvf php-5.2.3.tar.gz
# cd php-5.2.3
# ./configure --build=x86_64-redhat-linux-gnu --host=x86_64-redhat-linux-gnu --target=x86_64-redhat-linux-gnu --program-prefix= --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/libexec --localstatedir=/var --sharedstatedir=/usr/com --mandir=/usr/share/man --infodir=/usr/share/info --cache-file=../config.cache --with-config-file-path=/etc --with-config-file-scan-dir=/etc/php.d --enable-force-cgi-redirect --disable-debug --enable-pic --disable-rpath --enable-inline-optimization --with-exec-dir=/usr/bin --with-freetype-dir --with-png-dir=/usr/local --with-gd=shared --enable-gd-native-ttf --with-iconv --with-jpeg-dir=/usr/local --with-openssl --with-png --with-pcre-regex --with-zlib --with-layout=GNU --enable-magic-quotes --enable-sockets --enable-sysvsem --enable-sysvshm --enable-track-vars --enable-trans-sid --enable-memory-limit --enable-shmop --with-mime-magic=/usr/share/file/magic.mime --with-apxs2=/usr/sbin/apxs --with-sqlite --with-pdo-sqlite --without-pear --disable-xmlwriter --disable-xmlreader --disable-xml --disable-simplexml --disable-libxml --disable-dom --disable-ipv6 --disable-json --disable-hash --with-mysql --with-pdo-mysql

很多人在执行到这一步的时候，会出现以下问题：
Read more…

2 Comments »

CentOS 5.0 下架设Memcached服务器

CentOS, libevent, Memcached

June 25, 2007 at 12:32:32 · Filed under CentOS, Memcached

1、下载安装包

# cd /usr/local/src
# wget http://www.monkey.org/~provos/libevent-1.3b.tar.gz
# wget http://danga.com/memcached/dist/memcached-1.2.2.tar.gz

2、开始安装
安装libevent

# tar -zxvf libevent-1.3b.tar.gz
# cd libevent-1.3b.tar.gz
# ./configure
# make
# make install

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CentOS下安装Subversion&Trac

Apache, CentOS, mod_dav_svn, mod_python, Python, SQLite, Subversion, Trac, Wiki, 中文包

June 19, 2007 at 13:54:49 · Filed under Apache, CentOS, Python, SQLite

本文将采用Apache 2.2.3+Subversion1.4.2+Python 2.4.3+SQLite 3.3.6+Trac 0.10.4架设。

服务器IP为：192.168.1.200

1、Apache、Subversion、Python和SQLite均采用默认安装即可，yum即可安装。

# yum install httpd httpd-devel swig subversion mod_dav_svn sqlite python python-devel python-sqlite mod_python

2、配置Subversion

下面将使用myapp这个仓库来配置Subversion

# mkdir -p /var/www/svn
 
# cd /var/www/svn
 
# svnadmin create myapp
 
# chown -R apache:apache myapp
 
# vi /etc/httpd/conf.d/subversion.conf

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使用DenyHosts阻止SSH暴力破解

CentOS, DenyHosts, SSH

October 22, 2006 at 23:49:22 · Filed under CentOS

公司服务器每天都会有上千的SSH失败尝试记录，一直不停的扫描，这些人真够无聊的，没事吃饱了撑着，尽找些软件在那里穷举扫描（幸好服务器密码设置的够长够复杂）。

要一条一条将这些IP阻止显然治标不治本，于是找了个DenyHosts软件来代替的偶的手工活，吼吼:)

DenyHosts是Python语言写的一个程序，它会分析SSHD的日志文件，当发现重复的攻击时就会记录IP到/etc/hosts.deny文件，从而达到自动屏蔽IP的功能。

DenyHosts官方网站为：http://denyhosts.sourceforge.net

以下是安装记录（以CentOS 4.4, DenyHosts 2.5 为例）
Read more…

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CentOS下安装MRTG

Apache, CentOS, MRTG, SNMP, 流量图

October 21, 2006 at 10:47:50 · Filed under CentOS

1、安装SNMPD服务
# yum install net-snmp-utils
# vi /etc/snmp/snmpd.conf
把以下的内容注释掉：

# First, map the community name "public" into a "security name"

#       sec.name  source          community
##com2sec notConfigUser  default       public

####
# Second, map the security name into a group name:

#       groupName      securityModel securityName
##group   notConfigGroup v1           notConfigUser
##group   notConfigGroup v2c           notConfigUser

####
# Third, create a view for us to let the group have rights to:

# Make at least  snmpwalk -v 1 localhost -c public system fast again.
#       name           incl/excl     subtree         mask(optional)
##view    systemview    included   .1.3.6.1.2.1.1
##view    systemview    included   .1.3.6.1.2.1.25.1.1

####
# Finally, grant the group read-only access to the systemview view.

#       group          context sec.model sec.level prefix read   write  notif
##access  notConfigGroup ""      any       noauth    exact  systemview none none

1 Comment »