In order to use the “Yellow dog Updater Modified” (YUM) application to install software onto your VPS, you’ll first need to configure this software. This article will assist you in the setup and configuration of the YUM installer.

1. Download the following packages (using wget or similar) from the CentOS mirror into a directory of your choice (eg ~/temp)

http://ftp.monash.edu.au/pub/linux/CentOS/5.2/os/x86_64/CentOS/yum-3.2.8-9.el5.centos.1.noarch.rpm

http://ftp.monash.edu.au/pub/linux/CentOS/5.2/os/x86_64/CentOS/python-elementtree-1.2.6-5.x86_64.rpm

http://ftp.monash.edu.au/pub/linux/CentOS/5.2/os/x86_64/CentOS/python-sqlite-1.1.7-1.2.1.x86_64.rpm

http://ftp.monash.edu.au/pub/linux/CentOS/5.2/os/x86_64/CentOS/python-urlgrabber-3.1.0-2.noarch.rpm

http://ftp.monash.edu.au/pub/linux/CentOS/5.2/os/x86_64/CentOS/sqlite-3.3.6-2.x86_64.rpm

2. When you finish downloaded, run the command:

rpm -ivh ~/temp/*rpm

You should see an output similar to:

[root@server ~]# rpm -ivh ~/temp/*rpm
Preparing… ########################################### [100%]
1:sqlite ########################################### [ 20%]
2:python-sqlite ########################################### [ 40%]
3:python-urlgrabber ########################################### [ 60%]
4:python-elementtree ########################################### [ 80%]
5:yum ########################################### [100%]

You can now start to use YUM to manage software on your server.

1. Frist installing and configuring mysql
run the following command to install mysql.:

yum install mysql-server

then edit the /etc/my.cnf file:

vi /etc/my.cnf

delete every thing else and put this in here:

[mysqld]
default-storage-engine = myisam
key_buffer = 8M
query_cache_size = 8M
query_cache_limit = 4M
max_connections=25
thread_cache=1
skip-innodb
query_cache_min_res_unit=0
tmp_table_size = 4M
max_heap_table_size = 4M
table_cache=256
concurrent_insert=2

then set mysql password:

mysqladmin -u root password NEWPASSWORD

2. Installing and configuring kloxo
run the following command to install kloxo :

setenforce 0
wget http://download.lxcenter.org/download/kloxo/production/kloxo-install-master.shsh ./kloxo-install-master.sh –db-rootpassword=PASSWORD

After kloxo has been installed
Go to youripaddress:7778 or yourdomain:7778
the default login user/pass is admin/admin

you must change it when your first login in it.

then go on the left had side to the tab servers
then go to localhost
then go to switch programs
then change
Web (drop down box) apache ==> Web (drop down box) lighttpd
Dns (drop down box) bind ==> Dns (drop down box) djbdns
Spam (drop down box) spamassasin ==> Spam (drop down box) bojofilter

Finally, It running with less than 100Mb memory.

yum install vsftpd

When the install is done, you can start vsftpd using following command:

service vsftpd start

Then you can login anonymous ftp server using any ftp software like FlashFXP.
Note: The default anonymous ftp user home is “/var/ftp/”.

Configure Vsftpd and add FTP user

2.Open the file /etc/vsftpd/vsftpd.conf

vi /etc/vsftpd/vsftpd.conf

Edit the configure file

anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
chown_uploads=NO
xferlog_std_format=YES
listen=YES
pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES
chroot_local_user=YES

3.Add ftp user

adduser -d /var/ftp/ftpuser -g ftp -s /sbin/nologin ftpuser

You can change “ftpuser” to another name you like.
And you can also change the user root dir “/var/ftp/ftpuser” to another one.

4.Restart the vsftpd service

service vsftpd restart

5.Finally, you can login ftp server using your own username and password.

In the following tutorial, I will explain how to set up a pptp vpn server on CentOS 5.4.

1.Frist, make sure you have ppp installed

yum install -y ppp

2.Download lastest version pptpd rpm package

wget http://poptop.sourceforge.net/yum/stable/packages/pptpd-1.3.4-1.rhel5.1.i386.rpm

3.Installing the rpm

rpm -ivh pptpd-1.3.4-1.rhel5.1.i386.rpm

4.Open the file /etc/ppp/options.pptpd

vi /etc/ppp/options.pptpd

Uncomment the ms-dns lines (by removing the ‘#’ in front of them) and change them to the dns servers provided by your ISP or to public DNS servers like ones provided by OpenDNS.

ms-dns 208.67.222.222
ms-dns 208.67.220.220

5.Open the file /etc/ppp/chap-secrets

vi /etc/ppp/chap-secrets

Add usernames and passwords for your clients. You need to enter the usernames and passwords in the following format.

myusername pptpd mypassword *

6.Open the file /etc/pptpd.conf

vi /etc/pptpd.conf

Go to the end of the file where you can see examples of localip and remoteip. Below them add your own values for localip and remoteip.

localip 192.168.8.1
remoteip 192.168.8.101-200

7.Open the file /etc/sysctl.conf

vi /etc/sysctl.conf

Enable IP forwarding and make the changes to sysctl.conf take effectnet.ipv4.ip_forward = 1
/sbin/sysctl -p

8.Configure iptables to do NAT.

/sbin/service iptables start
/sbin/iptables -t nat -A POSTROUTING -o eth0 -s 192.168.8.0/24 -j MASQUERADE
service iptables save

9.Finally, Start the pptp service

/sbin/service pptpd start
chkconfig pptpd on