Sunday, 28 July 2013

Permanent(301) VS Temporary(302) redirect

301 vs 302 redirect:

301:

  • Status 301 means that the resource (page) is moved permanently to a new location. The client/browser should not attempt to request the original location but use the new location from now on. It's like a Change of Address form from the Postal Service. All traffic intended for URL A is permanently routed to URL B, and all link popularity and existing SEO value for URL A should also be transferred to URL B.

302:

  • Status 302 means that the resource is temporarily located somewhere else, and the client/browser should continue requesting the original url. There are very few instances where this type of redirect should be used, but unfortunately it is the easiest to implement. This means that many webmasters unfamiliar with search engine mechanics use the wrong type of redirect.
Is it okay?

Tuesday, 16 July 2013

Linux- Kickstart Based Installation

KickStart provides a way for users to automate a Red Hat Enterprise Linux installation.

Here are simple steps:


1.Install Apache.

[root@ranjith ~]# rpm -qa |grep -i httpd

[root@ranjith ~]# yum -y install httpd

[root@ranjith ~]# lsof -i tcp:80
COMMAND   PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
httpd   10787   root    4u  IPv6 223062      0t0  TCP *:http (LISTEN)
httpd   10789 apache    4u  IPv6 223062      0t0  TCP *:http (LISTEN)
httpd   10790 apache    4u  IPv6 223062      0t0  TCP *:http (LISTEN)


2. Create a install root where we gonna installing the contents of the cdrom to, We can use under default document root in /var/www/html.


[root@ranjith ~]# cd /var/www/html/

[root@ranjith html]# mkdir centos5

[root@ranjith html]# cd centos5/

[root@ranjith centos5]# pwd
/var/www/html/centos5


3. Download and mount the centos ISO file from: centos.org

Here i download: CentOS-6.4-x86_64

4. Mount the iso you downloaded to a mount point.

[root@ranjith mnt]# mount -o loop CentOS-6.4-x86_64-bin-DVD1.iso /mnt

[root@ranjith mnt]# du -sch /mnt
4.1G    /mnt
4.1G    total



5. Copy the contents of the iso into the directory you created.

[root@ranjith mnt]# cp -var /mnt/* /var/www/html/centos5/

6. Create a directory to house your kickstart configurations under Apache’s default document root of /var/www/html


[root@ranjith html]# mkdir kstart

[root@ranjith html]# cd kstart/

[root@ranjith kstart]# pwd
/var/www/html/kstart


7. Create the kickstart configuration file, kstart.cfg under kstart directroy. In kstart.cfg file kindlly place the below code.


#text-based insatllation.
text
install
url --url http://YOUR-SERVER-IP/centos5 // server-IP here
lang en_US.UTF-8
keyboard us
langsupport --default=en_US.UTF-8 en_US.UTF-8
network --device eth0 --bootproto dhcp
rootpw --iscrypted $1$/ABCabcABC/ // Password here
firewall --disabled
selinux --disabled
authconfig --enableshadow --enablemd5
timezone America/New_York
bootloader --location=mbr --append="console=xvc0"

# basic root, boot, swap partitioning here

zerombr yes
clearpart --all
part /boot --asprimary --fstype="ext3" --size=100 --bytes-per-inode=4096
part swap --asprimary --fstype="swap" --recommended --bytes-per-inode=4096
part / --asprimary --fstype="ext3" --grow --size=1 --bytes-per-inode=4096
reboot

# Utilities here

%packages --nobase
authconfig
crontabs
kbd
kudzu
man
ntp
openssh-clients
openssh-server
passwd
pciutils
rootfiles
rpm
system-config-securitylevel-

tui
traceroute
yum
yum-updatesd
vim-minimal
vixie-cron
which
wget
unzip
kudzu
man
ntp
openssh-clients
openssh-server
passwd
pciutils
rootfiles
rpm
system-config-securitylevel-
tui
traceroute
yum
yum-updatesd
vim-minimal
vixie-cron
which
wget
unzip
sudo
%post
(
chkconfig --level 3 ip6tables off
chkconfig --level 3 kudzu off
chkconfig --level 3 netfs off
chkconfig --level 3 yum-updatesd off
#
useradd -p 'webmaster' someotheruser
)  2>&1 | tee /root/post-install.log


8. Use the dvd you downloaded or grab a copy of the boot.iso from the install root. You can either use the install DVD iso you or use the 10MB boot.iso located in centos5/images/boot.iso I choose to use the boot.iso since its 10MB and is easily distributable.

9. start the web-server.


[root@ranjith html]# /etc/init.d/httpd start
Starting httpd:                        
                    [  OK  ]
10. Boot the system with boot.iso or install DVD. On the boot prompt enter:

linux ks=http://your_kickstart_ip/kstart/kstart.cfg

cheers!!!