How to install MailServer Zimbra on Centos 7
Disabled SELINUX
# vim /etc/sysconfig/selinux
Change enforcing to disabled :
# This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of these two values: # targeted - Targeted processes are protected, # minimum - Modification of targeted policy. Only selected processes are protected. # mls - Multi Level Security protection. SELINUXTYPE=targeted
Stop any MTA services installed in the server
# systemctl stop postfix # systemctl disable postfix # systemctl stop sendmail # systemctl disable sendmail
Update the OS
# yum update -y
Install the required packages and libraries by issuing the following command :
#yum install perl perl-core ntpl nmap sudo libidn gmp libaio libstdc++ unzip sysstat sqlite -y
Extract the downloaded tar file :
Using the following command you can extract the tar file, We downloaded in previous step
wget https://files.zimbra.com/downloads/8.6.0_GA/zcs-8.6.0_GA_1153.RHEL7_64.20141215151110.tgz tar xzf zcs-8.6.0_GA_1153.RHEL7_64.20141215151110.tgz
Go to extracted ZCS Open Source Edition :
cd zcs-8.6.0_GA_1153.RHEL7_64.20141215151110
Instal Zimbra.
./install.sh
Install and configure an FTP server in CentOS 7.
With the open end we will follow the steps. First baixaremos the required packages . For this type :
# yum update vsf*
We’ll be getting new updates packages only FTP service, which in Linux is known as vsftpd .
Made the update will go to the next step , which is the installation of the FTP service. For this type :
# yum install vsftpd
To appear like the screen below , press the Y button to accept and continue the installation.
After installation we will have to start the FTP service. For this type :
Centos 6:
# service vsftpd start
Centos 7 :
#systemctl start vsftpd
Ready , installed and started the FTP service. Now we can perform tests to see the operation of the service. It’s time to create a username and password to connect to your FTP server , for this type :
useradd
Example:
# useradd test
Let’s create the password for the user. which in my case is test :
# passwd test
You will be asked for you to enter a password and click on you are asked to repeat the password. After that, we have created the username and password released to access the FTP server.
Now we switch to the user created . For this type primarily the following command to log in as user test :
# su - test
Create a folder within this user :
# mkdir Softwares
Remember that Linux is case sensitive, so if you type the first letter capitalized , remember to type correctly later.
Okay, now we need to know the number of IP address that is on your computer in order to make the FTP connection.
Install Apache, PHP And MySQL On CentOS 7 (LAMP)
This tutorial shows how you can install an Apache2 webserver on a CentOS 7.0 server with PHP5 support (mod_php) and MySQL support. LAMP is short for Linux, Apache, MySQL, PHP.
1 Preliminary Note
In this tutorial, I use the hostname server1.example.com with the IP address 192.168.0.100. These settings might differ for you, so you have to replace them where appropriate.
I will add EPEL-7 repo here to install latest phpMyAdmin as follows:
rpm -ivh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
2 Installing MySQL 5
To install MySQL, we do install mariadb like this:
yum -y install mariadb-server mariadb
Then we create the system startup links for MySQL (so that MySQL starts automatically whenever the system boots) and start the MySQL server:
systemctl start mariadb.service systemctl enable mariadb.service
Set passwords for the MySQL root account:
mysql_secure_installation
Return:
[root@server1 ~]# mysql_secure_installation /usr/bin/mysql_secure_installation: line 379: find_mysql_client: command not found NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY! In order to log into MariaDB to secure it, we'll need the current password for the root user. If you've just installed MariaDB, and you haven't set the root password yet, the password will be blank, so you should just press enter here. Enter current password for root (enter for none): <--ENTER OK, successfully used password, moving on... Setting the root password ensures that nobody can log into the MariaDB root user without the proper authorisation. Set root password? [Y/n] New password: <--yourmariadbpassword Re-enter new password: <--yourmariadbpassword Password updated successfully! Reloading privilege tables.. ... Success! By default, a MariaDB installation has an anonymous user, allowing anyone to log into MariaDB without having to have a user account created for them. This is intended only for testing, and to make the installation go a bit smoother. You should remove them before moving into a production environment. Remove anonymous users? [Y/n] <--ENTER ... Success! Normally, root should only be allowed to connect from 'localhost'. This ensures that someone cannot guess at the root password from the network. Disallow root login remotely? [Y/n] <--ENTER ... Success! By default, MariaDB comes with a database named 'test' that anyone can access. This is also intended only for testing, and should be removed before moving into a production environment. Remove test database and access to it? [Y/n] <--ENTER - Dropping test database... ... Success! - Removing privileges on test database... ... Success! Reloading the privilege tables will ensure that all changes made so far will take effect immediately. Reload privilege tables now? [Y/n] <--ENTER ... Success! Cleaning up... All done! If you've completed all of the above steps, your MariaDB installation should now be secure. Thanks for using MariaDB! [root@server1 ~]#
3 Installing Apache2
CentOS 7.0 ships with apache 2.4. Apache2 is directly available as a CentOS 7.0 package, therefore we can install it like this:
yum -y install httpd
Return:
[root@server1 ~]# yum install httpd Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: ftp.plusline.de * extras: mirror.23media.de * updates: mirror.23media.de Package httpd-2.4.6-17.el7.centos.1.x86_64 already installed and latest version Nothing to do [root@server1 ~]#
By default apache will be installed, if-not then please install it as shown above
Now configure your system to start Apache at boot time…
systemctl start httpd.service systemctl enable httpd.service
In CentOS 7.0 uses Firewall-cmd, so I will customize it to allow external access to port 80 (http) and 443 (https).
firewall-cmd --permanent --zone=public --add-service=http firewall-cmd --permanent --zone=public --add-service=https firewall-cmd --reload
Now direct your browser to http://192.168.0.100, and you should see the Apache2 placeholder page:
4 Installing PHP5
We can install PHP5 and the Apache PHP5 module as follows:
yum -y install php
We must restart Apache afterwards:
systemctl restart httpd.service
5 Testing PHP5 / Getting Details About Your PHP5 Installation
The document root of the default website is /var/www/html. We will now create a small PHP file (info.php) in that directory and call it in a browser. The file will display lots of useful details about our PHP installation, such as the installed PHP version.
vi /var/www/html/info.php
Code:
<?php phpinfo(); ?>
Now we call that file in a browser (e.g. http://192.168.0.100/info.php):
As you see, PHP5 is working, and it’s working through the Apache 2.0 Handler, as shown in the Server API line. If you scroll further down, you will see all modules that are already enabled in PHP5. MySQL is not listed there which means we don’t have MySQL support in PHP5 yet.
6 Getting MySQL Support In PHP5
To get MySQL support in PHP, we can install the php-mysql package. It’s a good idea to install some other PHP5 modules as well as you might need them for your applications. You can search for available PHP5 modules like this:
yum search php
Pick the ones you need and install them like this:
yum -y install php-mysql
In the next step I will install some common PHP modules that are required by CMS Systems like WordPress, Joomla and Drupal:
yum -y install php-gd php-ldap php-odbc php-pear php-xml php-xmlrpc php-mbstring php-snmp php-soap curl curl-devel
Now restart Apache2:
systemctl restart httpd.service
Now reload http://192.168.0.100/info.php in your browser and scroll down to the modules section again. You should now find lots of new modules like curl etc there.:
7 phpMyAdmin installation
phpMyAdmin is a web interface through which you can manage your MySQL databases.
phpMyAdmin can now be installed as follows:
yum install phpMyAdmin
Now we configure phpMyAdmin. We change the Apache configuration so that phpMyAdmin allows connections not just from localhost (by commenting out the <Directory “/usr/share/phpmyadmin”> stanza):
vi /etc/httpd/conf.d/phpMyAdmin.conf
Code:
[...] Alias /phpMyAdmin /usr/share/phpMyAdmin Alias /phpmyadmin /usr/share/phpMyAdmin #<Directory /usr/share/phpMyAdmin/> # <IfModule mod_authz_core.c> # # Apache 2.4 # <RequireAny> # Require ip 127.0.0.1 # Require ip ::1 # </RequireAny> # </IfModule> # <IfModule !mod_authz_core.c> # # Apache 2.2 # Order Deny,Allow # Deny from All # Allow from 127.0.0.1 # Allow from ::1 # </IfModule> #</Directory> <Directory /usr/share/phpMyAdmin/> Options none AllowOverride Limit Require all granted </Directory> [...]
Next we change the authentication in phpMyAdmin from cookie to http:
vi /etc/phpMyAdmin/config.inc.php
Code:
[...] $cfg['Servers'][$i]['auth_type'] = 'http'; // Authentication method (config, http or cookie based)? [...]
Restart Apache:
systemctl restart httpd.service
Afterwards, you can access phpMyAdmin under http://192.168.0.100/phpmyadmin/:
8 Links
Apache: http://httpd.apache.org/
PHP: http://www.php.net/
MySQL: http://www.mysql.com/
CentOS: http://www.centos.org/
phpMyAdmin: http://www.phpmyadmin.net/
How to Install Squid (Caching / Proxy) on CentOS 7
Squid is a caching and forwarding web proxy. It is most often used in conjunction with a traditional LAMP stack (Linux, Apache, MySQL, PHP), and can be used to filter traffic on HTTP, FTP, and HTTPS, and increase the speed (thus lower the response time) for a web server via caching.
Pre-Flight Check
These instructions are intended specifically for installing Squid on a single CentOS 7 node.
I’ll be working from a Liquid Web Core Managed CentOS 7 server, and I’ll be logged in as root.
Step #1 Install Squid
First, clean-up yum:
yum clean all
As a matter of best practice we’ll update our packages:
yum -y update
Installing Squid and related packages is now as simple as running just one command:
yum -y install squid
Configure Squid to Start on Boot
And then start Squid:
systemctl start squid
Be sure that Squid starts at boot:
systemctl enable squid
To check the status of Squid:
systemctl status squid
To stop Squid:
systemctl stop squid
To access squid settings access : /etc/squid/squid.com
My basic config:
http_access allow localhost manager http_access deny manager # We strongly recommend the following be uncommented to protect innocent # web applications running on the proxy server who think the only # one who can access services on "localhost" is a local user #http_access deny to_localhost # # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS # # Example rule allowing access from your local networks. # Adapt localnet in the ACL section to list your (internal) IP networks # from where browsing should be allowed http_access allow localnet http_access allow localhost # And finally deny all other access to this proxy http_access deny all # Squid normally listens to port 3128 http_port 3128 # Uncomment and adjust the following to add a disk cache directory. #cache_dir ufs /var/spool/squid 10000 16 256 cache_replacement_policy heap LFUDA cache_swap_low 90 cache_swap_high 95 maximum_object_size_in_memory 100 MB cache_dir aufs /var/spool/squid 40000 16 256 cache_mem 40000 MB # Leave coredumps in the first cache dir coredump_dir /var/spool/squid # # Add any of your own refresh_pattern entries above these. #
That is all!
Easy Samba installation on RHEL/CentOS 7
Samba is a client/server system that implements network resource sharing for Linux and other UNIX computers. With Samba, UNIX files and printers can be shared with Windows clients and vice versa. Samba supports the Session Message Block (SMB) protocol. Nearly all Windows computers include SMB support with their internal network subsystems (NetBIOS in particular).
With an appropriately-configured Samba server on Linux, Windows clients can map drives to the Linux filesystems. Likewise, theSamba client on UNIX can connect to Windows shares by their UNC name. Although differences among various operating systems (such as filesystem naming conventions, end-of-line conventions, and authentication) can limit interoperability, Samba offers a generally serviceable mechanism for resource sharing on a heterogenous network.
In this tutorial we will show you how to install and configure Samba server on RHEL and CentOS 7 linux.
Install and configure Samba on Rhel/CentOS 7
To install samba packages enter following command:
#yum install samba samba-client samba-common -y
Now configure samba edit the file /etc/samba/smb.conf
#mv /etc/samba/smb.conf /etc/samba/smb.conf.bkp #vi /etc/samba/smb.conf
and paste following line:
[global] workgroup = WORKGROUP server string = Samba Server %v netbios name = centos security = user map to guest = bad user dns proxy = no #============================ Share Definitions ============================== [Anonymous] path = /samba/anonymous browsable =yes writable = yes guest ok = yes read only = no
Save the smb.conf file and restart the service:
#mkdir -p /samba/anonymous #systemctl enable smb.service #systemctl enable nmb.service #systemctl restart smb.service #systemctl restart nmb.service
Add these Iptables rules, so that samba will work perfectly:
#firewall-cmd --permanent --zone=public --add-service=samba #firewall-cmd --reload
Change permission for samba share:
#chmod -R 0755 anonymous/ #chown -R nobody:nobody anonymous/
Further we need to allow the selinux for the samba configuration as follows:
#chcon -t samba_share_t anonymous/
Now you can access the Centos 7.0 sharing in windows as follows, go to the Run prompt and type \centos :
Acesse \\centos
Now anonymous user can browse & create new text documents:
Secured samba server
For this I will create a group smbgrp & user rasho to access the samba server with proper authentication
#useradd rasho #groupadd smbgrp #usermod -a -G smbgrp rasho #smbpasswd -a rasho
[root@localhost]# smbpasswd -a rasho New SMB password: YOUR SAMBA PASS Retype new SMB password: REPEAT YOUR SAMBA PASS Added user rasho.
Create a new share, set the permission on the share:
#mkdir /home/secure #chown -R rasho:smbgrp /home/secure/ #chmod -R 0770 /home/secure/ #chcon -t samba_share_t /home/secure/
Again edit the configuration file as :
#vi /etc/samba/smb.conf
Add the newly created samba share in smb.conf file:
[Secure] path = /home/secure valid users = @smbgrp guest ok = no writable = yes browsable = yes
Restart the samba service:
#systemctl restart smb.service #systemctl restart nmb.service
Now at windows machine check the folder now with the proper credentials
Open samba sharing
That is all!










