a little review of Fedora 18

This is a little review of fedora 18, when I install phpmyprepaid as hotspot billing system in fedora 18. Of course, I consider this interesting and important to build a server.

Repolist

#yum repolist

repo id                                                 repo name                                                    status

fedora/18/x86_64                                Fedora 18 - x86_64                                     33,868

updates/18/x86_64                              Fedora 18 - x86_64 - Updates                    13,795

repolist: 47,663

Forty-seven thousand. Compared to Centos 6.4, this is so many. Wow, good, but I want to install epel to getting extra update repolist. In Centos, after downloading "epel", we can run it using the command "rpm-ivh". But in Fedora 18, we can't do that. You will get error. Like this,

# rpm -ivh epel-release-6-8.noarch.rpm

warning: epel-release-6-8.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY

error: Failed dependencies:

        fedora-release conflicts with epel-release-6-8.noarch

So, what will we do.?? The trick is to extract and copy manually.

# wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

# rpm2cpio epel-release-6-8.noarch.rpm | cpio -idmv

# cp ./etc/yum.repos.d/epel-testing.repo ./etc/yum.repos.d/epel.repo /etc/yum.repos.d/

# cp ./etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 /etc/pki/rpm-gpg/

# yum repolist

repo id                                        repo name                                                                   status

epel/x86_64                               Extra Packages for Enterprise Linux 6 - x86_64         8,606

fedora/18/x86_64                       Fedora 18 - x86_64                                                     33,868

updates/18/x86_64                     Fedora 18 - x86_64 - Updates                                     13,795

repolist: 56,269

we get epel, with eight thousand package. and repolist become fifty-six thousand.

Firewall

At first it difficult to set up a firewall, then after searching in google, the default firewall installed is not the iptables, but Firewalld. For configuration use the command firewall-cmd
If you want to re-use iptables, firewalld be stopped, then disabled / removed, and install iptables.
And use your favorite iptables. Then For iptables configuration via the gui, the system-config-firewall  is a good tool.

#yum install system-config-firewall system-config-firewall-tui

Another problem, when I run the "firewall.iptables" file in Fedora 18 (iptables v1.4.16.2), I get a warning.

WARNING: The state match is obsolete. Use conntrack instead.

While"firewall.iptables" file works well on Centos 6.4 (iptables v 1.4.7) and Ubuntu. This is how to fix.

Look through your iptables configuration and replace any occurences of -m state --state XYZ by the equivalent -m conntrack --ctstate XYZ. The old syntax is still supported for compatibility reasons (therefore it's only a warning), but will likely be removed in the future.

Systemd

Systemd has been introduced on fedora 14 (informed by Google). It's been a long time, but for me, it was a new thing. hahaha ... :) The last time when I was using fedora version 8. Most probably, in the future, "systemd" will replace "service" and "chkconfig". More info can be found at http://fedoraproject.org/wiki/Systemd

And this is the  example command of systemd.

# systemctl enable iptables.service

# systemctl enable snmpd.service

# systemctl enable httpd

# systemctl enable mysql

# systemctl enable mysqld

# systemctl enable dnsmasq

# systemctl -t service

# systemctl list-unit-files | grep service

# systemctl stop firewalld

# systemctl start iptables

# systemctl disable firewalld

Reference :

http://serverfault.com/questions/470287/how-to-enable-iptablesinstead-of-firewalld-services-on-fedora-18
http://fedoraproject.org/wiki/Systemd 
https://fedoraproject.org/wiki/FirewallD