Monday, September 29, 2014

Proxy setting add in YUM config file, /etc/yum.conf does not contain any proxy definitions ala:s

 

YUM config file, /etc/yum.conf does not contain any proxy definitions ala:

[main]

proxy=http://localhost:8080

proxy_username=put_proxy_user_name_here

proxy_password=put_proxy_user_password_here

 

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Thursday, September 25, 2014

Samba Server Configuration for CentOS 7 (Guide)

Samba Server Configuration for CentOS 7 (Guide)

Fahad Saleem

August 15, 2014

Tech

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Samba Server Configuration for CentOS 7 (Guide)

Samba offers file and print services for various clients of Microsoft Windows. It can also integrate with a Windows Server domain. This guide offers the procedure for Samba server configuration in CentOS 7 with anonymous and secured Samba servers.

Samba server CentOS7 also allows for interoperability between Linux/Unix servers as well as Windows-based clients. You need to have one Windows machine to check the CentOS 7 server. The Windows machine must lie on the same workgroup. In order to check the value in the Windows machine, you need to run the “net config workstation” command in cmd prompt.

In order to make windows client reachable, add the entry of your server IP address in the Run terminal.

“notepad C:\Windows\System32\drivers\etc\hosts”

The example values are as follows.

Anonymous Samba Sharing

  • You need to install Samba using the following command.

“yum install samba samba-client samba-common”

  • The command will install Samba version 4.1.1. For Samba server configuration, edit the file /etc/samba/smb.conf after creating its backup as follows.

“mv /etc/samba/smb.conf /etc/samba/smb.conf.bak”

  • Use the entries like this.

“vi /etc/samba/smb.conf

mkdir -p /samba/anonymous
systemctl enable smb.service
systemctl enable nmb.service
systemctl restart smb.service
systemctl restart nmb.service”

  • Further, to get rid of CentOS 7 firewall-cmd, use the following command.

“firewall-cmd –permanent –zone=public –add-service=samba”

  • You should observe the output as follows.

“[root@server1 ~]# firewall-cmd –permanent –zone=public –add-service=samba

success

[root@server1 ~]#”

  • Now use the following command.

“firewall-cmd –reload”

  • Now, CentOS sharing should be accessible in Windows. Go to Run and type “\\centos”.

  • From your Windows PC, just search for the folder and try to create a text file. You will get an error of permission denied.

  • You can check the permission for the shared folder by using the following command.

“ls –l”

  • To give anonymous users the permission, use the following command.

“cd /samba

chmod -R 0755 anonymous/
chown -R nobody:nobody anonymous/

ls -l anonymous/”

  • Furthermore, we need to allow the selinux for the Samba configuration as shown below.

“chcon -t samba_share_t anonymous/”

  • Now the anonymous user can browse and create the folder contents.

  • The content can also be cross-checked at server.

“ls -l anonymous/”

Secured Samba Server

  • For creating secured Samba Server, you need to create a group and a user for accessing Samba server with proper authentication.

“groupadd smbgrp

useradd srijan -G smbgrp

“smbpasswd -a srijan”

  • Now, create a folder in Samba and assign permissions like this.

“mkdir -p /samba/secured”

  • Again, we have to give permission Selinux to view the process.

“cd /samba
chmod -R 0777 secured/
chcon -t samba_share_t secured/”

  • You need to edit the configuration file again.

“vi /etc/samba/smb.conf”

“systemctl restart smb.service

systemctl restart nmb.service “

  • You can check the settings further as follows.

“testparm”

  • On the Windows device, check the folder now with proper credentials.

 

  • You will have to face the issue of permissions in order to give write permission to the user of Samba server.

“cd /samba
chown -R srijan:smbgrp secured/”

  • Finally, Samba user can write in the folder and the configuration is complete.

This article should be useful in applying CentOS Samba configuration for anonymous servers.

 

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CentOS / RHEL: Delete Old Yum Repositories and Configuration Files

CentOS / RHEL: Delete Old Yum Repositories and Configuration Files

ow do I delete old yum repositories and configuration files under RHEL 5 or CentOS Linux server?

You can delete old yum repositories and its configuration files from /etc/yum.repos.d/ directory

Method #1: Delete Repo Configuration Files Using the rm Command

Type the following commands
# cd /etc/yum.repos.d/
# ls -l
Sample outputs:

-rw-r--r-- 1 root root  954 Aug 11  2010 epel.repo
-rw-r--r-- 1 root root 1054 Aug 11  2010 epel-testing.repo
-rw-r--r-- 1 root root  561 Dec 14  2010 rhel-debuginfo.repo
-rw-r--r-- 1 root root  222 Dec 14  2010 rhel-source.repo
-rw-r--r-- 1 root root  235 Jan 16 15:27 srpm.repo

To delete epel.repo, enter:
# rm epel.repo epel-testing.repo
### ***************************** ###
### make sure you delete GPG keys also ###
### ***************************** ###
# rm /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL
# yum clean all

Method #2: Delete Repo .rpm Package

First, find out repo package name, enter:
# rpm -qa | grep epel
Sample outputs:

epel-release-5-4

# yum remove epel-release-5-4
# yum clean all

 

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Tuesday, September 23, 2014

How to Install and Configure OTRS 3.3.X in Centos 6.5 64 bit.

How to Install and Configure OTRS 3.3.X in Centos 6.5 64 bit.

Login as root

Donwload the rpm Package
wget http://ftp.otrs.org/pub/otrs/RPMS/rhel/6/otrs-3.3.5-02.noarch.rpm

Install the rpm Package
yum localinstall -y otrs-3.3.5-02.noarch.rpm

set selinux to permissive mode
setenforce 0

Restart Apache and MySQL
service httpd restart
service mysqld restart

Start OTRS service
service otrs start

Open web browser and add in url your server_ip_or_doamin
http://server_ip_or_domain/otrs/installer.pl
Step 1. Accept the GPL Agreement if you want to install OTRS
Step 2. Give Database details in
Step 3. It will ask for mail record, add the smtp & pop server detail
Step 4. At last it will give username and password, Kindly copy this info

Again Open web browser and add in url your server_ip_or_doamin for Agent Interface
http://server_ip_or_domain/otrs/index.pl

Again Open web browser and add in url your server_ip_or_doamin for Customer Interface
http://server_ip_or_domain/otrs/customer.pl

 

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How to install & configure Tomcat 6 on Centos 6.5

How to install & configure Tomcat 6 on Centos 6.5

login as root

yum update
yum install -y java
yum install tomcat6 tomcat6-webapps tomcat6-admin-webapps

You can modify default port 8080 to 80 (if required)
vi /usr/share/tomcat6/conf/server.xml
<Connector port="80" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />

For tomcat admin modify file
vi /usr/share/tomcat6/conf/tomcat-users.xml
add line
<user username="admin" password="tomcatpass" roles="manager"/>
in between <tomcat-users> & </tomcat-users>

Add permanent at start-up
chkconfig tomcat6 on
Start tomcat
service tomcat6 start

Add port on iptables
iptables -I INPUT -p tcp --dport 8o -j ACCEPT
service iptables save
service iptables restart

Open browser and add url or ip of your server in address bar
click on Tomcat Manager give username and password as you have added on the file tomact-users.xml as admin and tomcatpass

 

 

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How to install & configure OCSInventory 2.1 Agent on Centos 6.5 64 bit

How to install & configure OCSInventory 2.1 Agent on Centos 6.5 64 bit

OCSInventory 2.1 Agent Client Side installation on Linux Centos6

OCSInventory 2.1 Agent install on linux Centos 6.5 64 bit
yum install -y perl-XML-Simple perl-Compress-Zlib perl-Net-IP perl-LWP perl-Digest-MD5 perl-Net-SSLeay
yum install -y perl-Crypt-SSLeay perl-Net-SNMP perl-Proc-Daemon perl-Proc-PID-File perl-Sys-Syslog pciutils smartmontools monitor-edid

wget https://launchpad.net/ocsinventory-unix-agent/stable-2.1/2.1rc1/+download/Ocsinventory-Unix-Agent-2.1rc1.tar.gz
tar zxvf Ocsinventory-Unix-Agent-2.1rc1.tar.gz
cd Ocsinventory-Unix-Agent-2.1rc1
perl Makefile.PL
make
make install

Do you want to configure the agent
press y
Where do you want to write the configuration file?
press 2
Do you want to create the directory /etc/ocsinventory-agent?
press y
Should the old linux_agent settings be imported ?
Type n
What is the address of your ocs server?
Type server name or ip (192.168.1.126)
Do you need credential for the server?
Type n
Do you want to apply an administrative tag on this machine
Type n
Do yo want to install the cron task in /etc/cron.d
Type y
Do you want to create the /var/lib/ocsinventory-agent directory?
Type y
Should I remove the old linux_agent
Type n
Do you want to activate debug configuration option ?
Type y
Do you want to use OCS Inventory NG UNix Unified agent log file ?
Type n
Do you want disable SSL CA verification configuration option (not recommended) ?
Type n
Do you want to set CA certificate chain file path ?
Type n
Do you want to use OCS-Inventory software deployment feature?
Type y
Do you want to use OCS-Inventory SNMP scans feature?
Type y
Do you want to send an inventory of this machine?
Type y

To check the status of server 

ocsinventory-agent  -f

 

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How to install & configure Nagios 4.x on Centos 6.5

How to install & configure Nagios 4.x on Centos 6.5

login as root user

yum install httpd php gcc glibc glibc-common gd gd-devel -y
useradd nagios
groupadd nagcmd
usermod -a -G nagcmd nagios
usermod -a -G nagcmd apache

wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-4.0.1.tar.gz
tar zxvf nagios-4.0.1.tar.gz
cd nagios-4.0.1
./configure --with-command-group=nagcmd
make all
make install
make install-init
make install-config
make install-commandmode
make install-webconf

cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/
chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

wget https://www.nagios-plugins.org/download/nagios-plugins-1.5.tar.gz
tar xzvf nagios-plugins-1.5.tar.gz
cd nagios-plugins-1.5
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install

SELinux is enforcing then add this line.
semanage fcontext -a -t httpd_sys_content_t /usr/local/nagios/

Set nagios at auto-start & service to start
chkconfig nagios on
chkconfig httpd on
service httpd start
service nagios start

http://localhost/nagios or http://yourserver/nagios
username nagiosadmin
password password

 

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How to install & configure MySql 5.1 on Centos 6.5 64 bit

How to install & configure MySql 5.1 on Centos 6.5 64 bit

Login as root

yum update -y
yum install -y mysql mysql-server

Add for auto-restart
chkconfig mysqld on

Start MySql Server
service mysqld start

For secure run this script
mysql_secure_installation
add root password, remove test database and anonymous user

Add port on iptables
iptables -I INPUT -p tcp --dport 3306 -j ACCEPT
service iptables save
service iptables restart

mysql -uroot -pyourpassword
you will be in mysql prompt to quit type exit.

 

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How to install & configure OCSInventory 2.1 Server on Centos 6.5 64 bit

How to install & configure OCSInventory 2.1 Server on Centos 6.5 64 bit

login as root

Download EPEL
wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
rpm -ivh epel-release-6-8.noarch.rpm
yum update -y
yum groupinstall -y "Development tools"
yum install -y httpd httpd-devel mod_perl mod_php mod_ssl php-gd php-mysql php-mbstring php perl
yum install -y perl-XML-Simple perl-Compress-Zlib perl-DBI perl-DBD-MySQL  perl-Net-IP perl-SOAP-Lite perl-Apache-DBI
yum install -y perl-Apache2-SOAP perl-XML-Entities
yum install -y mysql-server mysql make

Start Service at BootTime
chkconfig httpd on && chkconfig mysqld on

Start Service Iptables add ports 80 for Apache & 3306 for MySql
service iptables start
iptables -I INPUT -m multiport -ptcp --dport 80,3306 -j ACCEPT
service iptables save
service iptables restart

Start Service Apace & MySql
service httpd start && service mysqld start

Login to mysql
mysql -uroot
create database ocsweb;
grant all privileges on ocsweb.* to ocs@localhost identified by "password-2014";
exit

Download OCS SERVER for Linux
wget https://launchpad.net/ocsinventory-server/stable-2.1/2.1/+download/OCSNG_UNIX_SERVER-2.1.tar.gz
tar zxvf OCSNG_UNIX_SERVER-2.1.tar.gz
cd OCSNG_UNIX_SERVER-2.1
sh setup.sh

add enter at ever step

after installation restart apache

service httpd restart
setenforce 0
chmod 775 /usr/share/ocsinventory-reports/ocsreports
chmod 775 /usr/share/ocsinventory-reports/ocsreports/dbconfig.inc.php

http://localhost/ocsreports/

MySQL Login ocs
mySQLpassword password-2014
DatabaseName ocsweb
Mysql HostName localhost

rm /usr/share/ocsinventory-reports/ocsreports/install.php

http://localhost/ocsreports/

user admin
password admin
setenforce 1

***Very Important****
Kindly modify the file and add database password in it.
vi /etc/httpd/conf.d/z-ocsinventory-serv.conf
edit
PerlSetEnv OCS_DB_PWD password-2014
:wq

 

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