Linux SA

Use Mandrill for WHM/Cpanel

mandrill-logo

This is instruction how to configure Exim on WHM server to send mails using Mandrill, first of all create account with Mandrill if you already don’t have one, after get API key from there website.

Now go on your whm and open “Service Configuration > Exim Configuration Manager > Basic Editor” Click on Mail and edit “Smarthost support” value add there “*: smtp.mandrillapp.com

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Yum – More space needed on the /boot filesystem

More space needed on the boot filesystem

After running yum update if your getting something like this

Transaction Check Error:
installing package kernel-2.6.32-431.11.2.el6.x86_64 needs 11MB on the /boot filesystem

this means that boot file system is full we will need to delete some date from there to install new kerenel.

to list all old kernels which are not needed any more:

rpm -qa | grep kernel
kernel-devel-2.6.32-431.1.2.0.1.el6.x86_64
kernel-2.6.32-431.1.2.0.1.el6.x86_64
kernel-devel-2.6.32-358.23.2.el6.x86_64
kernel-devel-2.6.32-431.5.1.el6.x86_64
kernel-devel-2.6.32-358.18.1.el6.x86_64
kernel-devel-2.6.32-431.3.1.el6.x86_64
kernel-headers-2.6.32-431.5.1.el6.x86_64
dracut-kernel-004-336.el6_5.2.noarch
kernel-2.6.32-431.5.1.el6.x86_64
kernel-firmware-2.6.32-431.5.1.el6.noarch
kernel-2.6.32-358.23.2.el6.x86_64

Now delete one of them using :

rpm -e kernel-2.6.32-431.1.2.0.1.el6.x86_64

and check space:

df -H /boot

if space not enough delete some other old kernels and start update again.

 

Apache, Mysql, PHP, Vernish, Webmin on Debian-Ubuntu

webmin debian

Most of all servers come with installed apache,php and mysql but but without vernish and webmin we need to install this soft manually on Debian or ubuntu.

We will start to upgrade out system:

apt-get update
apt-get dist-upgrade

Now if apache is not installed we should install it:

apt-get install apache2

install mysql server:

apt-get install mysql-server

install PHP:

apt-get install php5 php-pear php5-mysql php5-common php5-mcrypt php5-curl php5-cli php5-gd php5-dev

install curl(is needed for vernish) and unzip(if not installed):

apt-get install curl unzip

Now we must install dependencies for webmin control panel:

apt-get install perl libnet-ssleay-perl openssl libauthen-pam-perl libpam-runtime libio-pty-perl apt-show-versions python

Wget webmin and install it:

wget http://prdownloads.sourceforge.net/webadmin/webmin_1.660_all.deb
dpkg –install webmin_1.660_all.deb

at least install vernish:

curl http://repo.varnish-cache.org/debian/GPG-key.txt | apt-key add –
echo “deb http://repo.varnish-cache.org/debian/ wheezy varnish-3.0” >> /etc/apt/sources.list
apt-get update
apt-get install varnish

Now all software installed you can access your webmin control panel using https://yourip:10000

 

Install Nginx, PHP, Mysql – Debian

Nginix is great web server it’s much faster then apache server, but we need to make some tasks to install and configure Nginix with PHP.

 

1) Install mysql server and other tools which we need

apt-get install gcc libpcre3 libpcre3-dev zlib1g zlib1g-dev libssl-dev openssl libxml2-dev libevent-dev mysql-client mysql-server

2) Normally debian already includes Nginix

apt-get update

apt-get install nginx

3) Now we can install PHP and extensions

apt-get update

apt-get install php5 php5-fpm php-pear php5-common php5-mcrypt php5-mysql php5-curl php5-cli php5-gd php5-dev

4) Start all services

service nginx start

service php5-fpm start

service mysql start

5) Start php,mysql,nginx at start

update-rc.d nginx default

update-rc.d mysql defaults

update-rc.d php5-fpm defaults

 

There was a problem creating the parked domain – Cpanel

There was a problem creating the parked domain. Show Details

Error from park wrapper: Using nameservers with the following IPs: xxx.xxx.xxx.xxx,xxx.xxx.xxx.xxx Sorry, the domain is already pointed to an IP address that does not appear to use DNS servers associated with this server. Please transfer the domain to this servers nameservers or have your administrator add one of its nameservers to /etc/ips.remotedns and make the proper A entries on that remote nameserver.

FIX :

If you have access to WHM you must make this change –

WHM > Tweak Settings > Domains > Allow Remote Domains > On

Remove Apache Headers


For me it’s really wrong to show everyone which version of apache you have installed and other informations, many crackers can use this info to make attacks to your web server, so it’s will not be bad to hide them, this is really easy all you must to do is open httpd.conf file with vi command “vi httpd.conf” and find “ServerSignature On” replace On with OFF at next line add “ServerTokens Prod“, thats all restart apache server and enjoy your server version will not be available not in headers nor in error pages.

How to Emulate a Remote Linux Desktop From Windows

It’s really easy to control linux OS from windows by using remote desktop.  all what you need is several free software and done. first of all you must download SSH client I recommend Putty its free and really nice soft you can download it from here “http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html” second step is to login with SSH as root and install VNC server with cent os you can do this with this command “yum install vnc-server” also you must recheck that you have installed Gnome Desktop this is important if you don’t have you must install it too ” yum groupinstall “GNOME Desktop Environment” ” you also can use KDE&XFCE, now edit xstartup file “vi ~/.vnc/xstartup” it must be like this one and plus -Find the section where it says twm & and replace it with your choice. I know there are more, but these seem to be the most popular ones. Don’t include what I have in the parenthesis

-startkde & (used for the KDE window manager)
-exec gnome-session & (used for the Gnome window manager)
-startxfce4 & (used for the XFCE4 window manager, my favorite choice)

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