Tag Archives: CentOS

Python – Install cx_Oracle

I want to query data from an Oracle database from a Python program and this could be done by using the cx_Oracle Python package. This package required some Oracle package pre-requisites so it cannot be installed thru pip directly.

The following steps are done on a Centos 7 machine with Python 2.7.

1. Download and install the following from Oracle.

  • oracle-instantclient11.2-basic
  • oracle-instantclient11.2-devel
  • oracle-instantclient11.2-sqlplus

 

2. The installed client should be located at /usr/lib/oracle/11.2/client64.
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collectd – Cannot send out matrics

collectd is a statistics gathering tools which helps system admin to analysis the system conditions. It includes both server and client implementations. The collectd client send metrics to the collectd server.

 

I installed the collectd on a CentOS 7 machine and try to send the metrics to a Graphite instance. But no matter how i changed the setup, the Graphite couldn’t receive any data. Finally, i realized that it is blocked by the SELinux policy.
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Make Git work on HTTP protocol

Assume SELinux is disabled on your Git server…

The following setup is on CentOS and assume your Git repositories are all located under /data/repos.

1. Install Git and Apache.

yum install git httpd

 

2. Create the /etc/httpd/conf.d/git.conf.

# Git over HTTP
<VirtualHost *:80>
  SetEnv GIT_PROJECT_ROOT /data/repos
  SetEnv GIT_HTTP_EXPORT_ALL
  ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/

  <Location /git/>
    AuthType Basic
    AuthName "Git Access"
    AuthUserFile /var/www/passwd.git
    Require valid-user
  </Location>
</VirtualHost>

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PHP – PHP 5.3 Repository for CentOS from Webtatic.com

Webtatic.com provides its own repository. If you want to get the latest packages such as PHP and MySQL, you can consider adding it to your yum repo by the following steps.

1. Add the yum repository information

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CentOS – PHP5.2 Installation

Finally i make the yum work in the virtual linux inside the Cisco AXP 1.5. That virtual linux has a Cisco Built Linux Kernel which only has some basic commands and i need to install many software on it in order to make my application works. One of the pre-requisites is PHP 5.2 but unfortunately, the default CentOS repository – http://mirror.centos.org/ only provides PHP5.1.
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