Skip to main content

How to install Linux – CentOS 6 for Servers & Desktops

1) Set your computers BIOS to boot form CD / DVD

2) Insert the CentOS 6 CD or DVD

3) When presented with the following screen press enter on Install or upgrade an existing system.



4) You will now be presented with a CD Check, I always skip this step… I live life on the edge when it comes to media checking on Linux installs. However you might want to check the media.


5) You will now see some black and white text on your screen as your computer loads the X11 environment for the CentOS install, after 30 seconds or so you will be presented with the CentOS GUI installer, click next.


6) Select your Language, I am British (please no jokes about drinking tea on Twitter…) so I would select English (English).


7) Select your keyboard type


8) Storage type, as I am installing on my local hard drive I selected “Basic storage type” if you are using iSCSI or similar technology now would be the time to set it up.


9) As this is a clean install and the drive has never been formatted before I got the following Initialize drive warning, you might get the same if your drive (or virtual hard disk) is brand new.


10) Set the hostname for your Server


11) Set your timezone / location


12) Set your root password, something sensible please… Don’t set weak dictionary passwords or you will get hacked by a 13yr old russian super hackz0r… You might want to check out my guide on how to secure SSH.


13) You will now be set with a bunch of options for your disk partitioning, as this is a new fresh install I selected the top option “Use All Space” chose the relevant option for your setup and tick the review and modify partition layout.


14) You will now see your partition table laid out, now is the time to modify it if required. If this is a server I would suggest you create some different partitions for /home and /var. These are the two partitions that crash Linux servers, /home because users fill their home drives and causes the system to crash and /var because the log or ftp directories fill up and crash the server.


15) Format warning, click on Format (this will delete your data).


16) You will now see a warning about writing the changes to disk, click on Write changes to disk.


17) Boot loader options, I left this as default you might want to set a boot loader password.


18) The next part is important, for servers I ALWAYS select minimal, this installs a minimal setup which is ideal for servers, if you are installing for a desktop you might want to chose one of the other options. I would avoid the chose everything option as this will create a bloated system that will be more susceptible to hackers.


19) CentOS 6 will install


20) CentOS 6 has installed, congrats


21) Reboot and login as root


22) Update the system using “yum update”


Sometimes yum update doesn't work and we get error of following type

[root@centos-box ~]# yum update Loaded plugins: fastestmirror, refresh-packagekit Determining fastest mirrors Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=i386&repo=os error was 14: PYCURL ERROR 6 - "" Error: Cannot find a valid baseurl for repo: base

In this case you have to do the following:
Manually edit /etc/sysconfig/network-scripts/ifcfg-eth0 to get networking up:

[root@centos-box ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0

BOOTPROTO=dhcp
NM_CONTROLLED=no
ON_BOOT=yes

Save the file and reboot the server.

That’s it your done! Go forth and setup your server for what ever services you require, Asterisk, LAMP etc.

Comments

Popular posts from this blog

Odoo/OpenERP: one2one relational field example

one2one relational field is deprecated in OpenERP version>5 but you can achieve the same using many2one relational field. You can achieve it in following two ways : 1) using many2one field in both the objects ( http://tutorialopenerp.wordpress.com/2014/04/23/one2one/ ) 2)  using inheritance by deligation You can easily find the first solution with little search over internet so let's start with 2nd solution. Scenario :  I want to create a one2one relation between two objects of openerp hr.employee and hr.employee.medical.details What I should do  i. Add _inherits section in hr_employee class ii. Add field medical_detail_id in hr_employee class class hr_employee(osv.osv):     _name = 'hr.employee'     _inherits = {' hr.employee.medical.details ': "medical_detail_id"}     _inherit = 'hr.employee'         _columns = {              'emp_code':fields.char('Employee Code', si

How to draw Dynamic Line or Timeseries Chart in Java using jfreechart library?

Today we are going to write a code to draw a dynamic timeseries-cum-line chart in java.   The only difference between simple and dynamic chart is that a dynamic event is used to create a new series and update the graph. In out example we are using timer which automatically calls a funtion after every 1/4 th second and graph is updated with random data. Let's try with the code : Note : I had tried my best to provide complete documentation along with code. If at any time anyone have any doubt or question please post in comments section. DynamicLineAndTimeSeriesChart.java import java.awt.BorderLayout; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.Timer; import javax.swing.JPanel; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.XYPlot; import

pyodbc.OperationalError: ('08001', '[08001] [Microsoft][ODBC Driver 17 for SQL Server]

Recently, I faced this error in our Docker-Container environment. All the necessary packages were already installed but still, I was facing this clueless error. I search a bit and after an hour and so I found the exact reason and solution for this error. To know more about this error in detail. Please follow this Github thread. https://github.com/mkleehammer/pyodbc/issues/610 https://github.com/mkleehammer/pyodbc/issues/610#issuecomment-587523802 Solution: It's because the   server's certificate has too weak a key. In case you are using Linux env directly/not the Docker one.  Just edited /etc/ssl/openssl.cnf and change these 2 lines. MinProtocol = TLSv1.0 CipherString = DEFAULT@SECLEVEL=1 In case you are also using a container, please add these three lines to your Docker file. RUN chmod +rwx /etc/ssl/openssl.cnf RUN sed -i ' s/TLSv1.2/TLSv1/g ' /etc/ssl/openssl.cnf RUN sed -i ' s/SECLEVEL=2/SECLEVEL=1/g ' /etc/ssl/openssl.cnf Thanks!! Enjoy Programming! Refer