“spams”, its one of the major issue that a sys admin has to deal with throughout his job. First you need to find the user who is generating it. You can get it from the mail headers. Once you find the user, disable the script that was responsible for spams, but it may have already kept thousands(may be lacks) of mails in the exim queue waiting for its chance to get delivered. To delete these mails one by one is impossible. In a cPanel server having exim mail, you can use the following command to delete mails in the current queue generated by that particular user only.
SSH into the server
exiqgrep -i -f user@domain.com | xargs exim -Mrm
-i print messages id
-f from address
-Mrm remove mails
Remove mails to a particular sender in the queue :-
exiqgrep -i -t user@domain.com | xargs exim -Mrm
-t to address
Wednesday, July 17, 2013
Tuesday, July 16, 2013
How to enable DKIM in cPanel server.
DomainKeys Identified Mail (DKIM) lets an organization take responsibility for a message while it is in transit and one can use this to prevent from getting blacklisted by the free email providers like Yahoo, MSN and Google. DKIM can increase the mail authenticity.
cPanel does not have an interface to enable DKIM like we have for SPF and Domain Keys. cPanel is still working on it for getting it implemented. However we can enable it manually by following the below steps.
Check if exim is compiled with DKIM support enabled.
Generate the SSL keys
openssl rsa -in dkim.key -out dkim.public -pubout -outform PEM
You will find two keys, dkim.key & dkim.public
cPanel does not have an interface to enable DKIM like we have for SPF and Domain Keys. cPanel is still working on it for getting it implemented. However we can enable it manually by following the below steps.
Check if exim is compiled with DKIM support enabled.
root@server # /usr/sbin/exim -dd 2>&1 | grep Experimental_DKIM
Support for: crypteq iconv() IPv6 PAM Perl OpenSSL Content_Scanning Old_Demime Experimental_SPF Experimental_SRS
Experimental_DomainKeys Experimental_DKIM
Generate the SSL keys
cd /usr/local/cpanel/etc/eximopenssl genrsa -out dkim.key 1024
openssl rsa -in dkim.key -out dkim.public -pubout -outform PEM
You will find two keys, dkim.key & dkim.public
Monday, July 8, 2013
How do I reset Kloxo (LxAdmin) Admin Password
To reset lxadmin, you can do through SSH with just two commands:
cd /usr/local/lxlabs/lxadmin/httpdocslphp.exe ../bin/common/resetpassword.php master password
How to disable direct root login in your server
1. SSH into your server as root user.
2. Open the ssh configuration file using an editor like Vi
$ vi /etc/ssh/sshd_config
3. Find the line
Protocol 2, 1
4. Uncomment it and change it to look like
Protocol 2
5. Next, find the line
PermitRootLogin yes
6. Uncomment it and make it look like PermitRootLogin no
7. Save the file Ctrl+X then Y then enter
8. Now you can restart SSH
/etc/rc.d/init.d/sshd restart
Now, no one will be able to login to root with out first loggin in as admin and 'su -' to root, and you will be forcing the use of a more secure protocol. Just make sure you remember both passwords!
***If you're using cPanel make sure you add your admin user to the 'wheel' group so that you will be able to 'su -' to root, otherwise you may lock yourself out of root.***
2. Open the ssh configuration file using an editor like Vi
$ vi /etc/ssh/sshd_config
3. Find the line
Protocol 2, 1
4. Uncomment it and change it to look like
Protocol 2
5. Next, find the line
PermitRootLogin yes
6. Uncomment it and make it look like PermitRootLogin no
7. Save the file Ctrl+X then Y then enter
8. Now you can restart SSH
/etc/rc.d/init.d/sshd restart
Now, no one will be able to login to root with out first loggin in as admin and 'su -' to root, and you will be forcing the use of a more secure protocol. Just make sure you remember both passwords!
***If you're using cPanel make sure you add your admin user to the 'wheel' group so that you will be able to 'su -' to root, otherwise you may lock yourself out of root.***
How do I check what version of CentOS
To obtain the version of CentOS your server is running, from command line issue the following:
cat /etc/*release*
Installation of FFMPEG, Mencoder, GPAC for 3gp video conversion server for CentOS
# install dependencies
yum -y install gcc gmake make libcpp libgcc libstdc++ gcc4 gcc4-c++ gcc4-gfortran subversion patch zlib-devel
yum -y install gcc gmake make libcpp libgcc libstdc++ gcc4 gcc4-c++ gcc4-gfortran subversion patch zlib-devel
# get encoding software
cd /usr/local/src
cd /usr/local/src
wget http://www3.mplayerhq.hu/MPlayer/releases/codecs/essential-20071007.tar.bz2
wget http://ftp.penguin.cz/pub/users/utx/amr/amrnb-7.0.0.2.tar.bz2
wget http://downloads.sourceforge.net/gpac/gpac-0.4.5.tar.gz
tar xf gpac-0.4.5.tar.gz
tar jxvf amrnb-7.0.0.2.tar.bz2
tar jxvf essential-20071007.tar.bz2
wget http://ftp.penguin.cz/pub/users/utx/amr/amrnb-7.0.0.2.tar.bz2
wget http://downloads.sourceforge.net/gpac/gpac-0.4.5.tar.gz
tar xf gpac-0.4.5.tar.gz
tar jxvf amrnb-7.0.0.2.tar.bz2
tar jxvf essential-20071007.tar.bz2
svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg
svn checkout svn://svn.mplayerhq.hu/mplayer/trunk mplayer
svn checkout svn://svn.mplayerhq.hu/mplayer/trunk mplayer
# install encoding software
mkdir /usr/local/lib/codecs/
mv /usr/local/src/essential-20071007/* /usr/local/lib/codecs/
chmod -R 755 /usr/local/lib/codecs/
mkdir /usr/local/src/tmp
chmod 777 /usr/local/src/tmp
export TMPDIR=/usr/local/src/tmp
mv /usr/local/src/essential-20071007/* /usr/local/lib/codecs/
chmod -R 755 /usr/local/lib/codecs/
mkdir /usr/local/src/tmp
chmod 777 /usr/local/src/tmp
export TMPDIR=/usr/local/src/tmp
cd /usr/local/src/amrnb-7.0.0.2
./configure
make && make install
./configure
make && make install
cd /usr/local/src/mplayer
svn update
./configure
make && make install
svn update
./configure
make && make install
cd /usr/local/src/ffmpeg/
./configure –enable-libamr-nb –disable-mmx –enable-nonfree
make && make install
./configure –enable-libamr-nb –disable-mmx –enable-nonfree
make && make install
cd ./gpac
./configure
make && make install
./configure
make && make install
# update library links
echo /usr/local/lib > /etc/ld.so.conf.d/ffmpeg.conf
ldconfig
echo /usr/local/lib > /etc/ld.so.conf.d/ffmpeg.conf
ldconfig
How do I enable mod_rewrite in Apache2 on Debian?
Enabling mod_rewrite in apache2 is a simple procedure.
a2enmod rewrite
Edit /etc/apache2/sites-available/000-default or it may be called /etc/apache2/sites-available/default
and change the following line:
Options Indexes FollowSymLinks MultiViews
AllowOverride None
Order allow,deny
allow from all
change it to:
Options Indexes FollowSymLinks MultiViews
AllowOverride all
Order allow,deny
allow from all
Lastly, restart apache2:
/etc/init.d/apache2 restart
How to install ZPanel on ubuntu 12.04 x86_64
1) Ensure that you're using a server or VPS with a clean install of
Ubuntu 12.04. This tutorial will focus on using Neosurge's VPS hosting
solutions.
2) Log into the VPS or server as root.
3) Ensure all system packages are up to date and wait for the
update and upgrade has completed by entering the following command:
Tuesday, July 2, 2013
Installing DomainKeys and SPF Records
DomainKeys (DKIM) and SPF records are becoming a common, and annoying, demand among email providers, mainly Yahoo and Hotmail. In short, both are methods of email authentication designed to verify email integrity, by linking a sender to a specific server or hostname. In other words, DomainKeys and SPF records specify what servers can send email on behalf of a domain name.
You’ll want DomainKeys and SPF records if your users have trouble sending email to certain providers, or they are having issues with spoofed (forged) email. CPanel currently allows two easy ways for you or your users to set up email verification. This is supported at least from cPanel 11.18 onward.
User-Level:
You can enable the “Email Authentication” feature in WHM ~> Feature Manager, which will enable the Email Authentication icon in the users’ cPanels where they can create DomainKeys and SPF records for their domain(s).
Root-level:
You’ll want DomainKeys and SPF records if your users have trouble sending email to certain providers, or they are having issues with spoofed (forged) email. CPanel currently allows two easy ways for you or your users to set up email verification. This is supported at least from cPanel 11.18 onward.
User-Level:
You can enable the “Email Authentication” feature in WHM ~> Feature Manager, which will enable the Email Authentication icon in the users’ cPanels where they can create DomainKeys and SPF records for their domain(s).
Root-level:
How to do Directadmin to Directadmin Migration
The directadmin to directadmin migration is easy.
1) Set the value skip_domains_in_backups=1 in /usr/local/directadmin/conf/directadmin.conf . This will skip coping home folder during backup creation.
2) Do to admin panel Admin Tools -> Admin Backup/Transfer , And select all users and run a backup now .This will take all accounts backups under the folder /home/admin/admin_backups.
3) Now login to the admin panel of the new server and go to Admin Tools -> Admin Backup/Transfer , then select the “restore backups “. Chose all the backups files and click the submit.
4) Monitor the new server and wait for finishing the restore. You can check the top comand and or use pstree. See if the comamnd dataskq completed or not. Also check the home folders.
5) After finishing it simply rsync the home folders.
1) Set the value skip_domains_in_backups=1 in /usr/local/directadmin/conf/directadmin.conf . This will skip coping home folder during backup creation.
2) Do to admin panel Admin Tools -> Admin Backup/Transfer , And select all users and run a backup now .This will take all accounts backups under the folder /home/admin/admin_backups.
3) Now login to the admin panel of the new server and go to Admin Tools -> Admin Backup/Transfer , then select the “restore backups “. Chose all the backups files and click the submit.
4) Monitor the new server and wait for finishing the restore. You can check the top comand and or use pstree. See if the comamnd dataskq completed or not. Also check the home folders.
5) After finishing it simply rsync the home folders.
Nginx And DDOS Protection
cPnginx and Danginx can use to protect the HTTP DDOS as follows,
Edit the file /etc/sysctl.conf and increase the openfile limits. Add the following line,
fs.file-max = 700000
Edit /etc/security/limits.conf and add the following lines,
nobody soft nofile 100000
nobody hard nofile 500000
Now apply the sysctl configuration using the following command .
# sysctl -p
Now edit the /usr/local/nginx/conf/nginx.conf file and add the following line.
worker_rlimit_nofile 50000;
1) Add the following sysctl parameters,
—————
net.ipv4.tcp_syncookies = 1
# source validation / reversed path
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
kernel.pid_max = 65536
net.ipv4.ip_local_port_range = 9000 65000
————–
2) Use the RateLimit module , http://wiki.nginx.org/HttpLimitZoneModule It must be placed inside http block
—————–
limit_zone slimits $binary_remote_addr 10m;
limit_conn slimits 10;
——————
3) You can also use the following too,
—————-
limit_req_zone $binary_remote_addr zone=slimitss:10m rate=1r/s;
limit_req zone=slimitss burst=10;
Edit the file /etc/sysctl.conf and increase the openfile limits. Add the following line,
fs.file-max = 700000
Edit /etc/security/limits.conf and add the following lines,
nobody soft nofile 100000
nobody hard nofile 500000
Now apply the sysctl configuration using the following command .
# sysctl -p
Now edit the /usr/local/nginx/conf/nginx.conf file and add the following line.
worker_rlimit_nofile 50000;
1) Add the following sysctl parameters,
—————
net.ipv4.tcp_syncookies = 1
# source validation / reversed path
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
kernel.pid_max = 65536
net.ipv4.ip_local_port_range = 9000 65000
————–
2) Use the RateLimit module , http://wiki.nginx.org/HttpLimitZoneModule It must be placed inside http block
—————–
limit_zone slimits $binary_remote_addr 10m;
limit_conn slimits 10;
——————
3) You can also use the following too,
—————-
limit_req_zone $binary_remote_addr zone=slimitss:10m rate=1r/s;
limit_req zone=slimitss burst=10;
How to reset litespeed admin password
Go to the below path
run the below command
It will show below output
It will ask for the username type (admin) and password you want to set
/usr/local/lsws/admin/misc
run the below command
sh admpass.sh
It will show below output
Please specify the user name of administrator.
This is the user name required to login the administration Web interface.
User name [admin]: admin
Please specify the administrator’s password.
This is the password required to login the administration Web interface.
Password:
Retype password:
Administrator’s username/password is updated successfully!
It will ask for the username type (admin) and password you want to set
How to install WatchMySQL Plugin in WHM
Installation
Go to the below path
Remove the file or take the backup
Download watchmysql plugin using the below link
Change the ownership of that file
Change permission of the file.
Configuration
Before you run the script you must first configure it. Use edit to open the watchmysql script and set the options.
#Sets the maximum concurrent connections per MySQL user.
#Who to tell about this user... (email)
#Kill Abuser's MySQL Connections (0 = no, 1 = yes)
#MySQL polling in seconds (600 = 10 minutes)
Running
To start this script simply run the following command
If you want the script to start when the system boots you need to add the above line to /etc/rc.local
Go to the below path
cd /sbin
Remove the file or take the backup
rm -f watchmysql
Download watchmysql plugin using the below link
wget http://www.ndchost.com/cpanel-whm/scripts/watchmysql/download.php
Change the ownership of that file
chown root.root watchmysql
Change permission of the file.
chmod 0750 watchmysql
Configuration
Before you run the script you must first configure it. Use edit to open the watchmysql script and set the options.
#Sets the maximum concurrent connections per MySQL user.
my $max_concurrent_connections = '15';
#Who to tell about this user... (email)
my $warning_email = 'your@email.address';
#Kill Abuser's MySQL Connections (0 = no, 1 = yes)
my $kill_user = '0';
#MySQL polling in seconds (600 = 10 minutes)
my $check_interval = '600';
Running
To start this script simply run the following command
/sbin/watchmysql &
If you want the script to start when the system boots you need to add the above line to /etc/rc.local
rpm command cheat sheet for Linux
rpm is a powerful Package Manager for Red Hat, Suse and Fedora Linux.
It can be used to build, install, query, verify, update, and
remove/erase individual software packages. A Package consists of an
archive of files, and package information, including name, version, and
description:
| Syntax | Description | Example(s) |
| rpm -ivh {rpm-file} | Install the package | rpm -ivh mozilla-mail-1.7.5-17.i586.rpm rpm -ivh –test mozilla-mail-1.7.5-17.i586.rpm |
| rpm -Uvh {rpm-file} | Upgrade package | rpm -Uvh mozilla-mail-1.7.6-12.i586.rpm rpm -Uvh –test mozilla-mail-1.7.6-12.i586.rpm |
| rpm -ev {package} | Erase/remove/ an installed package | rpm -ev mozilla-mail |
| rpm -ev –nodeps {package} | Erase/remove/ an installed package without checking for dependencies | rpm -ev –nodeps mozilla-mail |
| rpm -qa | Display list all installed packages | rpm -qa rpm -qa | less |
| rpm -qi {package} | Display installed information along with package version and short description | rpm -qi mozilla-mail |
| rpm -qf {/path/to/file} | Find out what package a file belongs to i.e. find what package owns the file | rpm -qf /etc/passwd rpm -qf /bin/bash |
| rpm -qc {pacakge-name} | Display list of configuration file(s) for a package | rpm -qc httpd |
| rpm -qcf {/path/to/file} | Display list of configuration files for a command | rpm -qcf /usr/X11R6/bin/xeyes |
| rpm -qa –last | Display list of all recently installed RPMs | rpm -qa –last rpm -qa –last | less |
| rpm -qpR {.rpm-file} rpm -qR {package} |
Find out what dependencies a rpm file has | rpm -qpR mediawiki-1.4rc1-4.i586.rpm rpm -qR bash |
How to Install EAccelerator, IonCube, Zend Optimizer, SourceGuardian, and SuHosin outside of EasyApache
You can use /scripts/phpextensionmgr to install or uninstall these modules!
If you wanted to install Zend Optimizer use the below command.
/scripts/phpextensionmgr list
Available Extensions:
EAccelerator
IonCubeLoader
Zendopt
SourceGuardian
PHPSuHosin
If you wanted to install Zend Optimizer use the below command.
/scripts/phpextensionmgr install Zendopt
Installing Zendopt
Determining PHP version
Installing Zend Optimizer binary
Activating Zend Optimizer in /usr/local/lib/php.ini
Zend Optimizer activated
Skipping install to /usr/local/php4, missing php.ini
Site is working fine with apache but giving 403 error with litespeed
=================================
Error 403: Forbidden
You don’t have permissions to access this page. This usually means one of the following:
===================================
Go to the clients account for which you are getting the error message.
Create a .htaccess file and enter the below lines into it.
save and quit
Error 403: Forbidden
You don’t have permissions to access this page. This usually means one of the following:
===================================
Go to the clients account for which you are getting the error message.
Create a .htaccess file and enter the below lines into it.
SecFilterEngine Off
SecFilterScanPOST Off
save and quit
How to reset ssh port through WHM
Login to your WHM using 2086
And then browse the below URL:
It will prompt for server password insert it and it will show that port is reset to default(22)
And then browse the below URL:
http://serverip:2086/scripts2/doautofixer?autofix=safesshrestart
It will prompt for server password insert it and it will show that port is reset to default(22)
How to install varnish through yum
Download varnish rpm using the below link
run the below command
rpm –nosignature -i http://repo.varnish-cache.org/redhat/el5/noarch/varnish-release-2.1-2.noarch.rpm
run the below command
yum install varnish
How to uninstall varnish manually
Go to the folder where you have downloaded the tar file.
Go inside apachebooster folder
Provide the below permission to the file.
Run the below command to uninstall it.
Go inside apachebooster folder
Provide the below permission to the file.
chmod 777 uninstall
Run the below command to uninstall it.
sh uninstall
How to Install varnish manually
Download the tar file from the below link
untar it using the below command.
go into extracted directory
then fire the below command
wget http://prajith.in/downloads/apachebooster.tar.gz
untar it using the below command.
tar -xvf apachebooster.tar.gz
go into extracted directory
cd apachebooster
then fire the below command
sh install.sh
Install Mhash in php 5.3+ in cPanel Centos Linux servers
The php-mhash installation in php 5.3 is very easy. Please use the following steps to install it
1) Download the latest mhash from http://mhash.sourceforge.net/ and install it as follows,
1) Download the latest mhash from http://mhash.sourceforge.net/ and install it as follows,
2) Now add it to the loader configuration in /etc/ld.so.conf.d/mhash.conf# tar -xzf mhash-0.9.9.9.tar.gz # ./configure --prefix=/opt/mhash # make # make install
3) Now edit the file /var/cpanel/easy/apache/rawopts/all_php5 and add the following line/opt/mhash/lib
4) Finally compile the php using the following command--with-mhash=/opt/mhash
You can test the mhash by creating a phpinfo page in your website document root.# /scripts/easyapache --build
How to convert directadmin to SUPHP
Conversion to SUPHP in directadmin is easy. You may please proceed with the following steps
1) Set the following custom build options
This easy steps will help you to conversion your directadmin to suphp and fix the permission issues in your scripts.
1) Set the following custom build options
2)Now compile apache and php using the following commands/build set php5_cgi yes ./build set php5_cli no
3) Now need to fix the roundcube , squirrelmail and phpmyadmin permissions as follows,./build all d ./build rewrite_confs
4) Now need to fix the ownership and permission of files and dirs as follows,./build roundcube ./build squirrelmail ./build phpmyadmin
# for i in `/bin/ls /usr/local/directadmin/data/users/` ; do chown -R $i.$i /home/$i/domains/* ; echo $i ;done
# for i in `/bin/ls /usr/local/directadmin/data/users/` ; do find /home/$i/domains/ -type f -exec chmod 644 {} \; ; echo $i ;done
# for i in `/bin/ls /usr/local/directadmin/data/users/` ; do find /home/$i/domains/ -type d -exec chmod 755 {} \; ; echo $i
This easy steps will help you to conversion your directadmin to suphp and fix the permission issues in your scripts.
CSF Directadmin Issue Permission denied [User:admin UID:501]- Solved
This is a simple permission issue in directadmin. The CSF in
directadmin is running a setuid program. So it simply need to enable
the setuid permission for the root user in this program. You may
need to look into the following file ,
Now you need to enable the “S” bit as follows,# ls -al /usr/local/directadmin/plugins/csf/exec/csf -rwxr-xr-x 1 root root 8112 Jun 23 10:37 /usr/local/directadmin/plugins/csf/exec/csf
Now login to the directadmin as admin user and check the CSF page. It must work.# chmod 4755 /usr/local/directadmin/plugins/csf/exec/csf # ll /usr/local/directadmin/plugins/csf/exec/csf -rwsr-xr-x 1 root root 8112 Jun 23 10:37 /usr/local/directadmin/plugins/csf/exec/csf
How to install mod_evasive in cPanel server
Please follow the procedure given below to install and configure mod_evasive in cPanel server with apache 2.2.
Download the latest source file from http://www.zdziarski.com
Download the latest source file from http://www.zdziarski.com
# cd /usr/local/src/ # wget /blog/wp-content/uploads/2010/02/mod_evasive_1.10.1.tar.gz # tar -xvzf mod_evasive_1.10.1.tar.gz # cd mod_evasive/ # /usr/local/apache/bin/apxs -cia mod_evasive20.c
Now create a file named /usr/local/apache/conf/mod_evasive.conf and add the following lines
Now include the above file inside /usr/local/apache/conf/includes/pre_main_global.conf# cat /usr/local/apache/conf/mod_evasive.conf LoadModule evasive20_module modules/mod_evasive20.so <IfModule mod_evasive20.c> DOSHashTableSize 3097 DOSPageCount 2 DOSSiteCount 50 DOSPageInterval 1 DOSSiteInterval 1 DOSBlockingPeriod 10 </IfModule>
Now rebuild httpd.confInclude "/usr/local/apache/conf/mod_evasive.conf"
Now restart apache/scripts/rebuildhttpdconf
/scripts/restartsrv httpd
Monday, July 1, 2013
How Do I Restore A MySQL Database?
To restore a MySQL database please follow the below steps:
- Login to your control panel www.yourdomain.com/cpanel
- Click on 'Backups' in 'Site Management'
- Click on 'Browse' to locate the Database you want to restore then click 'Upload'
It may take a while to upload your .sql and populate the database so a broadband connection would help. This will overwrite the database that you currently have up.
- Login to your control panel www.yourdomain.com/cpanel
- Click on 'Backups' in 'Site Management'
- Click on 'Browse' to locate the Database you want to restore then click 'Upload'
It may take a while to upload your .sql and populate the database so a broadband connection would help. This will overwrite the database that you currently have up.
Reset Bandwidth Usage In WHM/cPanel
If you run cPanel on your VPS or Dedicated Server and want to reset bandwidth for a particular user or domain then:
WHM/cPanel should now show 0 for the user/domain in Account Information >> View Bandwidth Usage
- ssh to your server
- cd /var/cpanel/bandwidth.cache/
- vi domainname.com and/or vi username
- replace contents with 0
- save and quit
WHM/cPanel should now show 0 for the user/domain in Account Information >> View Bandwidth Usage
How To Reset A Kloxo Or LxAdmin Password From SSH
When your VPS is installed by us with Kloxo or LXadmin the password will 'admin' and the username 'admin' too.
Note: if you reinstall yourself it will also be 'admin'.
If you still can't login then:
Note: if you reinstall yourself it will also be 'admin'.
If you still can't login then:
1) Login via SSH
2) cd /usr/local/lxlabs/kloxo/httpdocs
or
2) cd /usr/local/lxlabs/lxadmin/httpdocs
3) /usr/bin/lphp.exe ../bin/common/resetpassword.php master NEWPASSWORD
How to force redirection to HTTPS
To force visitors to use HTTPS to access your site via yor SSL
certificate is to add the following to the top of a .htaccess file:
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}
CentOS - Hostname Change
There are 4 steps in a hostname change, luckily all the steps are easy.
Sysconfig/Network
Open the /etc/sysconfig/network file with your favorite text editor. Modify the HOSTNAME= value to match your FQDN host name.# sudo nano /etc/sysconfig/network
HOSTNAME=myserver.domain.com
Hosts File
Change the host that is associated to your main IPaddress for your server, this is for internal networking (found at /etc/hosts):
Run Hostname
The 'hostname' command will let you change the hostname on the server that the commandline remembers, but it will not actively update all programs that are running under the old hostname.
Restart Networking
At this point all the necessary changes that needed to be made have been made, you will want to restart networking on your server to make sure that changes will be persistent on reboot:# /etc/init.d/network restart
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