Installing nagios without samba

# Here is a script to install nagios on Centos 6.5 without the samba dependencies
# since I installed samba4 from source and did not want to install the samba 3.6 that comes with Centos 6
yum -y install nagios nagios-plugins-nrpe nrpe php httpd \
 nagios-common         \
 nagios-plugins         \
 nagios-plugins-breeze     \
 nagios-plugins-by_ssh     \
 nagios-plugins-cluster     \
 nagios-plugins-dhcp        \
 nagios-plugins-dig         \
 nagios-plugins-disk        \
 nagios-plugins-dns         \
 nagios-plugins-dummy       \
 nagios-plugins-file_age    \
 nagios-plugins-flexlm      \
 nagios-plugins-fping       \
 nagios-plugins-game        \
 nagios-plugins-hpjd        \
 nagios-plugins-http        \
 nagios-plugins-icmp        \
 nagios-plugins-ide_smart   \
 nagios-plugins-ircd        \
 nagios-plugins-ldap        \
 nagios-plugins-load        \
 nagios-plugins-log         \
 nagios-plugins-mailq       \
 nagios-plugins-mrtg        \
 nagios-plugins-mrtgtraf    \
 nagios-plugins-mysql       \
 nagios-plugins-nagios      \
 nagios-plugins-nt          \
 nagios-plugins-ntp         \
 nagios-plugins-ntp-perl    \
 nagios-plugins-nwstat      \
 nagios-plugins-oracle      \
 nagios-plugins-overcr      \
 nagios-plugins-perl        \
 nagios-plugins-pgsql       \
 nagios-plugins-ping        \
 nagios-plugins-procs       \
 nagios-plugins-real        \
 nagios-plugins-rpc         \
 nagios-plugins-sensors     \
 nagios-plugins-smtp        \
 nagios-plugins-snmp        \
 nagios-plugins-ssh         \
 nagios-plugins-swap        \
 nagios-plugins-tcp         \
 nagios-plugins-time        \
 nagios-plugins-ups         \
 nagios-plugins-users       \
 nagios-plugins-wave

chkconfig httpd on && chkconfig nagios on
service httpd start && service nagios start

Install Samba 4.1.3 on Centos 6.5

# Install dependencies
yum -y remove 'samba*'
yum -y install glibc glibc-devel gcc libacl-devel krb5-workstation krb5-libs pam_krb5
yum -y install 'python*'
yum -y install git git-core
yum -y install gdb
yum -y install 'ctdb*' 'libtdb*' 'python-tdb' 'tdb-tools'
yum -y install 'libtalloc*'
yum -y install pytalloc pytalloc-devel
yum -y install libtevent libtevent-devel
yum -y install 'popt*'
yum -y install ldb-tools pyldb pyldb-devel libldb libldb-devel
yum -y install ncurses ncurses-devel ncurses-libs ncurses-base ncurses-term
yum -y install compat-libtermcap
yum -y install migrationtools
yum -y install perl-Parse-Yapp
yum -y install gamin
yum -y install libaio libaio-devel
yum -y install 'cups*'
yum -y install 'pam*' llibcgroup-pam nss-pam-ldapd passwd sssd-client fprintd-pam PyPAM
yum -y install 'ncurses*'
yum -y install 'libtool-ltdl*'
yum -y install 'isomd5*'
yum -y install 'libgcrypt*' 'python-crypt*'
yum -y install 'libcap*'
yum -y install 'bind-devel' bind-libs bind-utils
yum -y install 'avahi*'
yum -y install 'docbook*'
yum -y install 'libacl*'

#Build samba

cd /root
mkdir samba
cd samba
wget http://ftp.samba.org/pub/samba/samba-4.1.3.tar.gz
tar xvzf samba-4.1.3.tar.gz
cd samba-4.1.3
./configure --enable-debug --enable-selftest
make -j 8
make install
service samba start
chkconfig samba on

# Build and install Bind9

cd /root/
mkdir /root/bind
cd /root/bind
wget https://www.isc.org/downloads/file/bind-9-8-6-p1-tar-gz/?version=tar.gz
tar xvzf index.html\?version\=tar.gz
cd bind-9.8.6-P1
 ./configure --with-gssapi=/usr/include/gssapi --with-dlopen=yes
make -j 8
make install
groupadd -g 25 named
useradd -g named -u 25 -d /var/named -M -s /sbin/nologin named
service named start
chkconfig named on

# Provision domain on your AC DC
/usr/local/samba/bin/samba-tool domain provision --use-rfc2307 --interactive

#to query records, use kerberos login
 /usr/local/samba/bin/samba-tool dns query COMPANY.company.com 
company.com @ ALL

#join domain using uppercase to force kerberos
use :  MYDOMAIN.local.com

Fix error when cloning from a git repository (bitbucket) from Netbeans

I was having problems cloning from bitbucket.org in Netbeans 7.0, then I found this fix and worked like a charm!

http://wiki.netbeans.org/FaqPermissionDeniedJDK7

Discovering all hosts in a local network with arp-scan

I had to do an inventory of which hosts were active in the local network. I used arp-scan for this

http://www.nta-monitor.com/wiki/index.php/Arp-scan_User_Guide#Discovering_all_hosts_on_the_local_network

Configuring SELinux to work with rsync in Centos 6

I found that after doing the normal configuration of rsync in Centos 6 you need to add a couple lines of SELinux

sudo setsebool -P allow_rsync_anon_write=1
chcon -t public_content_rw_t /data/

Found here.

Also on the source machine we need the following

sudo setsebool -P rsync_export_all_ro 1
sudo setsebool -P rsync_client 1

Exfat support for Centos 6.4

The packages are in http://rpmfusion.org/Configuration

Follow the instruction to start using the repo, then:

sudo yum install fuse-exfat exfat-utils

Centos 6 + Squid + Filezilla

I was having problems getting Filezilla to work with my Squid/Centos6 server.

I added the following lines to squid.conf

acl ftp proto FTP
always_direct allow ftp

But still was not working, then later came across this solution

acl SSL_ports port 1025-65535 # unregistered ports

And that fixed the whole thing.

This also fixed problems when using Netbeans 7 and git trying to connect to bitbucket.org.

How to setup proxy autoconfiguration in Centos 6

Here are the steps to add a proxy configuration script to your squid server so that your browser will discover the proxy automagically.

First create the file /var/www/html/wpad.dat on your server. Add the following contents:

function FindProxyForURL(url, host) { return "PROXY mysquid:3128"; } 

This is the simplest javascript code to make it work. You can find more examples here.

If you haven't got httpd, install it

yum install httpd

Add a file wpad.conf in your /etc/httpd/conf.d directory with the contents:

<Directory /var/www/html>
Order deny,allow
Deny from all
# add IP address you allow
Allow from 172.16.1.1/16
</Directory>

Edit the /etc/httpd/conf/httpd.conf file and add the following lines to correctly set the mime type of the .dat file:

AddType application/x-ns-proxy-autoconfig .pac
AddType application/x-ns-proxy-autoconfig .dat

The browser will search for http://wpad/wpad.dat when discovering proxies.

Now the real trick is to add an address record (not an alias, this does not work with all browsers) in your DNS configuration that points to your apache server serving the wpad.dat file

A wpad.my-local-net.com 172.1.1.1 

Make sure to open the firewall for the apache web server serving your wpad.dat file.

How to avoid NetworkManager overwriting resolv.conf in Centos 6 (RHEL 6, Fedora)

This one took me a while to figure out mainly due to conflicting information on the web.

The easiest way to avoid NetworkManager to overwrite your /etc/resolv.conf when getting a dhcp lease is to create a new file /etc/dhcp/dhclient-eth0.conf. For some reason in Centos 6 Network manager will not pick up the /etc/dhcp/dhclient.conf or /etc/dhclient.conf files. Also sometimes it is good to delete the /var/run/nm-dhclient-eth0.conf file since sometimes this file will not be recreated.

Here is my /etc/dhcp/dhclient-eth0.conf file. Change eth0 to the name of your interface if different.

# /etc/dhcp/dhclient-eth0.conf
# Use Google DNS instead of DCHP provided
supersede domain-name-servers 8.8.8.8;
# Correctly set the local domain name
supersede domain-search "mydomain.com";
supersede domain-name "mydomain.com";

The supersede directive will replace the DHCP configuration with your own. If you wish to append or prepend, use the 'append' or 'prepend' directive.

Now regenerate the /etc/resolv.conf file

sudo service NetworkManager restart

Install VLC media player on Centos 6.4

# Script to install VLC player on Centos 6.4

#Install the EPEL repository
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
sudo rpm -Uvh remi-release-6*.rpm epel-release-6*.rpm

# Install RPMFusion

sudo yum -y localinstall --nogpgcheck http://download1.rpmfusion.org/free/el/updates/6/i386/rpmfusion-free-release-6-1.noarch.rpm

sudo yum -y localinstall --nogpgcheck http://download1.rpmfusion.org/nonfree/el/updates/6/i386/rpmfusion-nonfree-release-6-1.noarch.rpm

# Install VLC

sudo yum -y --enablerepo=remi-test install vlc

Installing Firebird 1.5 on Centos 6 32 bit (x86)

A while ago I needed to migrate a Firebird 1.5 server from Centos 5 to Centos 6 (to a new machine) since the old server had been running for 7+ years and it was time to give the old guy a break. I tried to install it in Centos 6 64 bit to no avail so I tried the 32 bit flavor and it worked as a charm. Here I provide a quasi-script to install all the dependencies, etc.

I tried my luck with the Classic Server first since I thought it would scale better since every connection would have its own process and use the whole 4GB per process limit on 32 bit, but the server would drop connections after 10+ users so I went with the SuperServer which was the Centos 5 configuration that worked well.

# Install dependencies

sudo su -l
yum -y install glibc.i686
yum -y install libstdc++.so.5
yum -y install libncurses.so.5

# Download Firebird Super Server

wget http://downloads.sourceforge.net/project/firebird/firebird-linux-i386/1.5.6-Release/FirebirdSS-1.5.6.5026-0.i686.rpm?r=http%3A%2F%2Fwww.firebirdsql.org%2Fen%2Ffirebird-1-5%2F&ts=1384921841&use_mirror=softlayer-dal

# Install Firebird package

rpm -i FirebirdSS-1.5.6.5026-0.i686.rpm

# Turn the service on at boot time

chkconfig --level 35 firebird on

# Optionally change the sysdba password

cd /opt/firebird

cat SYSDBA.password

bin/changeDBAPassword.sh

# Optionally create db path

mkdir /home/firebird

chown firebird:firebird /home/firebird

# Optionally Install flamerobin

wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
sudo rpm -Uvh remi-release-6*.rpm epel-release-6*.rpm

yum -y install firebird-libfbclient

cd /root

wget http://downloads.sourceforge.net/project/flamerobin/flamerobin-snapshots/0.9.x/flamerobin-0.9.1.1806-i386-gtk2.tgz?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Fflamerobin%2Ffiles%2Fflamerobin-snapshots%2F0.9.x%2F&ts=1385064466&use_mirror=softlayer-dal

cd /

tar xvzf /root/flamerobin-0.9.1.1806-i386-gtk2.tgz

# Test flamerobin

ssh -Y user@server

flamerobin