Archive for June, 2010

  • Optimize and Tweak High-Traffic Servers

    Wednesday, June 30th, 2010

    Summary If you are reaching the limits of your server running Apache serving a lot of dynamic content, you can either spend thousands on new equipment or reduce bloat to increase your server capacity by anywhere from 2 to 10 times. This article concentrates on important and poorly-documented ways of increasing capacity without additional hardware. [...]

  • Yum installation on RHEL4

    Tuesday, June 29th, 2010

    Yum prerequistes are: python-elementtree is needed by yum-2.4.2-0.4.el4.rf.noarch python-sqlite is needed by yum-2.4.2-0.4.el4.rf.noarch urlgrabber is needed by yum-2.4.2-0.4.el4.rf.noarch and the prereques for Uvh python-sqlite is: libsqlite-2.8.15-1.i386.rpm These rpm are to be installed in the following order # rpm -Uvh libsqlite-2.8.15-1.i386.rpm # rpm -Uvh python-elementtree-1.2.6-7.el4.rf.i386.rpm #rpm -Uvh python-sqlite-0.5.0-1.2.el4.rf.i386.rpm # rpm -Uvh python-urlgrabber-2.9.7-1.2.el4.rf.noarch.rpm # rpm -Uvh yum-2.4.2-0.4.el4.rf.noarch.rpm [...]

  • Http monitoring using httptop

    Tuesday, June 29th, 2010

    One of the tools most Linux/Unix admins are used to is called “top”. “top” by itself is a very powerful tool. Installation Perl modules in cpan install Term::ReadKey install File::Tail install Time::HiRes Create a executable script #touch /usr/bin/httptop #chmod a+x /usr/bin/httptop Copy & paste the following contents in the script #!/usr/bin/perl -w use Time::HiRes qw( [...]

  • Great Strategies for Using Memcached and MySQL Better Together

    Monday, June 28th, 2010

    The primero recommendation for speeding up a website is almost always to add cache and more cache. And after that add a little more cache just in case. Memcached is almost always given as the recommended cache to use. What is Memcached? Memcached is a general-purpose distributed memory caching system that was originally developed by [...]

  • Tool for automatically creating the basic framework for a PHP module

    Friday, June 25th, 2010

    WHAT IT IS It’s a tool for automatically creating the basic framework for a PHP module and writing C code handling arguments passed to your functions from a simple configuration file. See an example at the end of this file. HOW TO USE IT Very simple. First, change to the ext/ directory of the PHP [...]

  • How to do Large partions >2 TB, Gparted

    Sunday, June 20th, 2010

    To Create a Partition of more than 2 TB, Gparted is used. You must include GPT support in kernel in order to use GPT. If you don’t include GPT support in Linux kernelt, after rebooting the server, the file system will no longer be mountable or the GPT table will get corrupted. By default Redhat [...]

  • How to use socat with haproxy

    Friday, June 18th, 2010

    Introduction:- All you know about the haproxy, that its the one of the good opensource load balancing software and to check the fun stats of haproxy here we using ‘socat’ – Multipurpose relay (SOcket CAT) about —– socat is a relay for bidirectional data transfer between two independent data channels. Each of these data channels [...]

  • How to Install Munin on CentOS

    Friday, June 18th, 2010

    Introduction:- Munin is a highly flexible and powerfull solution used to create graphs of virtually everything imaginable throughout your network, while still maintining a rattling easy of installation and configuration. Munin is a networked resource monitoring tool that can help analyze resource trends and “what just happened to kill our performance?” problems. It is designed [...]

  • OpenEmm — Mass Mailing ,Compain server

    Thursday, June 17th, 2010

    yum install mysql-server sendmail-cf MySQL-python libxml2 Download Jdk latest version from: wget http://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/VerifyItem-Start/jdk-6u20-linux- i586.bin?BundledLineItemUUID=Er9IBe.oOf0AAAEoay9bNk7a&OrderID=gddIBe.oe.0AAAEoXi9bNk7a&ProductID=guBIBe.oc_wAAAEnaDJHqPYe&FileName=/jdk-6u20-linux-i586.bin mv jdk-6u20-linux-i586.bin?AuthParam=1272633583_0b435f520fad540d314411f50a185d7a&TicketId=B%2Fw4khmGSVNITB1FPFVTkwPl&GroupName=CDS&FilePath=%2FESD6%2FJSCDL%2Fjdk%2F6u20-b02%2Fjdk-6u20-linux-i586.bin&File=jdk-6u20-linux-i586.bin jdk-6u18-linux-i586.bin Download openemm source file from : http://sourceforge.net/projects/openemm/files/OpenEMM%20software/OpenEMM%206.0.1/OpenEMM-6.0.1-bin.tar.gz/download Create the ‘openemm’ User Create a special group and user for OpenEMM: groupadd openemm useradd -m -g openemm -d /home/openemm -c “OpenEMM 6.x.y” openemm Installation: Sun Java JDK Copy the file [...]

  • WARNING: You will need re2c 0.9.11 or later if you want to regenerate PHP parsers.

    Tuesday, June 15th, 2010

    I am getting this error “configure: WARNING: You will need re2c 0.9.11 or later if you want to regenerate PHP parsers.” while i tried to install json support with PHP 5.1.6 What is re2c? re2c is a tool for writing very fast and very flexible scanners. Unlike any other such tool, re2c focuses on generating [...]

  • Password less ssh login

    Friday, June 11th, 2010

    SSH Login Without Password Using ssh-keygen & ssh-copy-id You can login to a remote Linux server without entering password in 3 simple steps using ssky-keygen and ssh-copy-id ssh-keygen creates the public and private keys. ssh-copy-id copies the local-host’s public key to the remote-host’s authorized_keys file. ssh-copy-id also assigns proper permission to the remote-host’s home, ~/.ssh, [...]

  • SMTP Redirection using Xinetd

    Wednesday, June 2nd, 2010

    1. Service sendmail stop 2.Create New File in /etc/xinetd.d/smtp Insert the following contents service smtp { disable = no socket_type = stream protocol = tcp user = nobody wait = no server = /bin/nc server_args = -w 2 xx.xx.xx.xx 25 } Save and Close , also make sure to replace xxx with the SMTP server [...]

  • InnoDB: Unable to lock ./ibdata1, error: 37

    Tuesday, June 1st, 2010

    InnoDB: Unable to lock ./ibdata1, error: 37 I recently faced the “error  InnoDB: Unable to lock ./ibdata1, error: 37 “ while moving my data directory to NFS from local disk , when I restarted the mysql , the restart failed and I got the error in the error log , all permissions were set properly [...]