Showing posts with label RHEL 7. Show all posts

Monday, 21 January 2019

RHEL 7 January 21, 2019

OS Ticket installation in Centos 7

INSTALLATION OS TICKET PANEL

Execute the following command to setup the LAMP server.

yum install httpd php php-{cli,common,gd,mysql,imap,mbstring,xml} mysql mysql-server -y

Run the following command to test the PHP installation by setting up info.php file under the root document.

echo -e " < ?php
phpinfo()
?> " > /var/www/html/info.php
cat /var/www/html/info.php
service httpd start
chkconfig --levels 235 httpd on
service mysqld start
chkconfig --levels 235 mysqld on
mysql_secure_installation

Set root password? [Y/n] y
Remove anonymous users? [Y/n] y
Disallow root login remotely? [Y/n] y
Remove test database and access to it? [Y/n] y
Reload privilege tables now? [Y/n] y

Now Create data base in SQL

mysql -u root -p
create database osticket;
CREATE USER 'osticket'@'localhost' IDENTIFIED BY 'nafees123';
GRANT ALL PRIVILEGES ON osticket.* TO 'osticket'@'localhost';
FLUSH PRIVILEGES;
show databases;

sudo yum -y install git
git clone https://github.com/osTicket/osTicket-1.8
sudo su
cp -R osTicket-1.8/* /var/www/html/
cd /var/www/html/

Load the browser with the server ip address/localhost.

But we are missing a few packages that are needed to move on with the installation.

yum -y install php-xml php-gd php-mbstring php-imap
yum install php-pecl-apcu
yum --enablerepo=remi install php-intl
```
systemctl restart httpd
```
```
 
```
```
 
```

cd /var/www/html/include
cp ost-sampleconfig.php ost-config.php

networkstip 0

Wednesday, 5 December 2018

RHEL 7 December 05, 2018

Install PHP 7.2 on CentOS 7 To Resolve Clipbucket 4 Installation Problem

Install PHP 7.2 on CentOS 7 To Resolve Clipbucket 4 Installation Problem PHP Recommend Version for Clipbucket

Enabling Remi repository

sudo yum install epel-release yum-utils
sudo yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm

Installing PHP 7.2 on CentOS 7

sudo yum-config-manager --enable remi-php72

Once the repository is enabled install PHP 7.2 and few most common PHP modules:

sudo yum install php php-common php-opcache php-mcrypt php-cli php-gd php-curl php-mysqlnd

Verify the PHP installation, by typing the following command which will print the PHP version:

php -v

OutPut
PHP 7.2.9 (cli) (built: Aug 15 2018 09:19:33) ( NTS ) Copyright (c) 1997-2018 The PHP Group Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies with Zend OPcache v7.2.9, Copyright (c) 1999-2018, by Zend Technologies

Installing PHP 7.1 on CentOS 7

Enable the PHP 7.1 repository by typing:

sudo yum-config-manager --enable remi-php71

Install PHP 7.1 and few most common PHP modules:

sudo yum install php php-common php-opcache php-mcrypt php-cli php-gd php-curl php-mysql

php -v

OutPut
PHP 7.1.21 (cli) (built: Aug 15 2018 17:56:55) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2018 Zend Technologies
with Zend OPcache v7.1.21, Copyright (c) 1999-2018, by Zend Technologies

```
sudo systemctl restart httpd 
```

Configuring PHP 7.x to work with Nginx

sudo yum install php-fpm

By default PHP FPM will run as user apache on port 9000. We’ll change the user to nginx and switch from TCP socket to Unix socket. To do so edit the lines highlighted in yellow:

/etc/php-fpm.d/www.conf

...
user = nginx
...
group = nginx
...
listen = /run/php-fpm/www.sock
...
listen.owner = nginx
listen.group = nginx

Make sure the /var/lib/php directory has the correct ownership:

chown -R root:nginx /var/lib/php

Once you made the changes, enable and start the PHP FPM service:

sudo systemctl enable php-fpm
sudo systemctl start php-fpm
```
sudo systemctl restart nginx
```

networkstip 1

RHEL 7 December 05, 2018

Completely remove MariaDB or MySQL from CentOS 7 or RHEL 7

sudo yum remove -y mariadb mariadb-server && sudo rm -rf /var/lib/mysql /etc/my.cnf

If Above Command does not work

yum remove mariadb mariadb-server
rm -rf /var/lib/mysql
rm /etc/my.cnf
yum install mariadb mariadb-serve
yum remove MariaDB-server MariaDB-client
sudo systemctl stop mysqld.service && sudo yum remove -y mariadb mariadb-server && sudo rm -rf /var/lib/mysql /etc/my.cnf
rpm -qa | grep mariadb
rpm -e --nodeps "mariadb-libs-5.5.56-2.el7.x86_64"
rpm -e --nodeps "mariadb-server-5.5.56-2.el7.x86_64"
rpm -e --nodeps "mariadb-5.5.56-2.el7.x86_64"
rm -f /var/log/mariadb
rm -f /var/log/mariadb/mariadb.log.rpmsave
rm -rf /var/lib/mysql
rm -rf /usr/lib64/mysql
rm -rf /usr/share/mysql

networkstip 1

Sunday, 18 November 2018

RHEL 7 November 18, 2018

CentOS 7 SSH key for no password Authentication login with RSA Key

1. ssh-keygen -t rsa

just simply press enter

if you want to configure password on Rsa file just type a password to protect the other wise leave it blank in my case i am typing password nafees12345

key is generated now copy the id-rsa file in to your pc

next is change mode

2. chmod 700 ~/.ssh

3. mv ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys

the above command no 3 will change the rsa.pub file to authorized_key this file will used when we try to login via ssh and ssh will match the rsa key from this file now change the mode of file

4. chmod 600 ~/.ssh/authorized_keys

5. vi /etc/ssh/sshd_config

6. systemctl restart sshd

7.Go to official Putty download page, grab the last version of the Putty Windows Installer executable package and install it onto your Windows computer.

8.After you have finished installing Putty go to Windows Start, type putty string to search field and open PuTTygen program which you will use it to generate Keys pairs.

Click on load and load the

Now type tha passphrase key which is in my case nafees12345

clik on save private key to save key for putty access

Open putty to left Category menu, select SSH –> Auth, hit the Browse button, search and add your Private Key.

just type user name root and done

networkstip 1

webmine November 18, 2018

Let's Encrypt installation on webmine Failed to request certificate : No virtual host matching was found

how to install Let's Encrypt on webmine

click on Virtual mine
click on server configuration
click on Manage SSL Certificate
click on Lets Encrypt
Finally Click on Request Certificate

networkstip 0

webmine November 18, 2018

How to install Modules in webmine

How to install Modules in Webmine

As i am installing PPTP Server

After Installation it shows like this

done but shome times it shows an error Installed but hidden from view Now go to directory /usr/libexec/webmin/[module name]/module.info

networkstip 0

webmine November 18, 2018

How To Enable Two Factor Authentication in Virtualmin

Click on the Webmin section
Select the Webmin option
Select the Webmin Configuration module

Click on the Two-Factor Authentication module

Select your authentication provider
1. For the purpose of this article I will be selecting Google Authenticator
Click the Save button

When using Google Authenticator a QR code will display that you can scan using the Authenticator app on your smartphone.

if there is any error follow blew steps

Install Perl Packages

Using SSH (shell), enter these commands one by one,

yum install gcc
yum install 'perl(Moose)'
yum install 'perl(Digest::HMAC)'
yum install 'perl(Module::Build)'

This will install all required perl packages for Source build and supporting WebMin Two Factor Authentication.

Note: If you get error “No package perl(Moose) available” then please go through this short guide to install perl-Moose from tar package.

Pull Authen::OATH source package and Unzip it

Now, you must pull fresh package from CPAN,

wget http://www.cpan.org/authors/id/S/SI/SIFUKURT/Authen-OATH-v1.0.0.tar.gz

Unzip it using,

tar -xvf Authen-OATH-v1.0.0.tar.gz

Extract, Build & Install Authen::OATH Perl Package

Change the directory to newly extracted folder. In my case, I issued following command,

cd Authen-OATH-v1.0.0

Enter these commands one by one,

perl Build.PL
./Build
./Build test
./Build install

Restart WebMin – Very Important.

service webmin restart

networkstip 1

webmine November 18, 2018

How to disable two factor authentication in Webmin/Virtual mine

How to disable two factor authentication in Webmin

Access Server through SSH Run these commands to remove Two-Factor authentication
sed -i 's/totp//g' /etc/webmin/miniserv.users
sed -i '/twofactor_provider=totp/d' /etc/webmin/miniserv.conf
/etc/init.d/webmin restart

networkstip 1

Tuesday, 4 September 2018

webmine September 04, 2018

How to Install Webmine Virtualmin (CentOS 7)

How to Install Virtualmin (CentOS 7)

How Do I Install Virtualmin On CentOS 7?

This tutorial implies that you’re using the root account on a server to perform the installation and that you have a basic working knowledge of a Linux shell. Although this tutorial is written strictly for CentOS 7, Virtualmin offers an automated installation script for the following distros:

CentOS/RHEL/Scientific Linux 7 on x86_64
CentOS/RHEL/Scientific Linux 5 and 6 on i386 or x86_64
Debian 6, 7, and 8 on i386 or amd64
Ubuntu 12.04 LTS, 14.04 LTS, and 16.04 LTS on i386 or amd64 (non-LTS releases are not supported)

The following steps can be utilized to install Virtualmin in a CentOS 7 (RHEL 7) environment.

Ensure your server is up to date

yum update -y

Install perl for the Virtualmin script to execute correctly

yum install perl -y

Download the Virtualmin installer script using wget

wget http://software.virtualmin.com/gpl/scripts/install.sh

Make the script executable

chmod +x install.sh

Execute the install script

sh install.sh

As per the warning when the script is executed ensure that your OS is listed and type “y” then press “Enter” to continue with the installation

Installation complete successfully

If prompted you may need to enter in a fully qualified hostname Please note that this domain name will need to resolve to your server

Click the “Next” button

Select if you’d like to run clamd in the background
Click “Next”

Select if you’d like to run spamd in the background
Click “Next”

Select if you’d like to run a MySQL server, PostgreSQL server or both
Click “Next”

Set a root password for the database server (MySQL/PostgreSQL)
Select if you’d like to remove the test MySQL database
Select if you’d like to remove the anonymous MySQL user
Click “Next”

Select the appropriate configuration for your system

Click “Next”

Set the Primary nameserver
Set the Secondary nameservers if needed
Click “Next”

Select to store plain-text or hashed password
Click “Next”

The Post-Installation Wizard should now be complete and you should be able to start using your new control panel. The first thing you should do is create a new virtual server so that you can begin hosting your site(s). We have written the following article to help you set up a virtual server in Virtualmin: Creating a New Virtual Server in Webmin/Virtualmin

Creating a New Virtual Server in Webmin/Virtualmin

To add a new site/domain (Virtual Server) to Webmin please use the following steps.

Login to Webmin
Select Virtualmin
Select the Create Virtual Server option

Fill in the required information for the domain
1. New virtual server type
  1. Top-level server
  2. Sub-server
  3. Alias
2. Domain name
3. Description
4. Administration password
5. Server configuration template
6. Account plan
7. Administration username
Click Create Server

How To Install SSL Let's Encrypt Certificate in Webmine

1st of all we need to enable ssl apache feature on virtual server

After that follow these steps

Click on Server Configuration
Then Manage SSL Certificate
Just click on Request Certificate

networkstip 0

Tuesday, 3 July 2018

samba shares July 03, 2018

VSFTPD with Samba Server on Centos

VSFTPD with Samba Server on Centos

Installing VSftpd FTP Server on CentOS

VSftpd is an FTP server for Linux.

Install the VSftpd Server

Type the following command to install the VSftpd FTP Server:

[root@centos7 ~]# yum install vsftpd

Backup the default configuration file ‘vsftpd.conf’:

[root@centos7 ~]# cp /etc/vsftpd/vsftpd.conf /etc/vsftpd/vsftpd.conf.back

We also need to install the FTP client, so that we can connect to an FTP server:

[root@centos7 ~]# yum install ftp

networkstip 0

Monday, 23 April 2018

windows Server2012 April 23, 2018

RAID levels

RAID is a technology that is used to increase the performance and/or reliability of data storage. The abbreviation stands for Redundant Array of Inexpensive Disks. A RAID system consists of two or more drives working in parallel. These disks can be hard discs, but there is a trend to also use the technology for SSD (solid state drives). There are different RAID levels, each optimized for a specific situation. These are not standardized by an industry group or standardization committee. This explains why companies sometimes come up with their own unique numbers and implementations. This article covers the following RAID levels:

RAID 0 – striping
RAID 1 – mirroring
RAID 5 – striping with parity
RAID 6 – striping with double parity
RAID 10 – combining mirroring and striping

networkstip 0

Wednesday, 11 April 2018

samba shares April 11, 2018

Create And Configure Samba Shares In CentOS 7

Then enter the hostname and IP address of the server and save the file. (add the line below at the end of the file and save)
192.168.0.1 srvr1.domain.com srvr1

networkstip 0

Monday, 22 January 2018

RHEL 7 January 22, 2018

Change a server's hostname in CentOS

Change a server’s hostname

Using a text editor, open the server’s /etc/sysconfig/network file.

# sudo nano /etc/sysconfig/network

Modify the HOSTNAME= value to match your FQDN hostname.

HOSTNAME=myserver.domain.com

networkstip 0

Thursday, 20 October 2016

RHEL 7 October 20, 2016

How to Change Hostname and ip in RHEL / CentOS 7.0

How to Change Hostname in RHEL / CentOS 7.0

You have probably needed to change the hostname of your CentOS 7 install for one reason or the other. Changing the hostname in CentOS 7 is now much simpler than ever.

If you are ready open up your terminal and follow through this tutorial, and in less than 10 minutes you will have changed your hostname!

Check Hostname

To check the hostname open your terminal and type the following command:

$ hostname

By default the hostname is localhost.localdomain. To change this you can follow the following steps

Edit /etc/hostname File

The easiest way to change the hostname is to edit the /etc/hostname file. Open your terminal and with your favourite text editor delete localhost.localdomain and change to whatever name you like.

$ sudo vi /etc/hostname

Save changes and then confirm your hostname by using hostname command. If it has not changed then you need to restart the CentOS 7 server.

Using Hostnamectl

Hostnamectl is a tool that is used control the Linux system hostname. You can also use this tool to change the hostname in a few easy steps.

First and foremost confirm the hostname by using hostnamectl as follows:

$ hostnamectl status

To change the hostname type the command:

$ hostnamectl set-hostname grace

It may be necessary to restart the systemd-hostnamed daemon so that as to reflect the change in Static hostname.

$ sudo systemctl restart systemd-hostnamed

Note: Hostnamectl recognizes three types of hostnames: pretty, static and transient. Pretty is stored in/etc/machine-info and is a human readable format while static hostname is stored in /etc/hostname. Transient hostname is more of a temporary hostname which may take up the static hostname when network connectivity is lost.

Using Nmtui

To change the hostname you can also use the NetworkManager text interface tool (nmtui). This is also another very easy method and fairly straight forward.

From the command line invoke nmtui:

$ sudo nmtui

This will present to you a text user interface like this. Using the arrow keys select Set system hostname and use tab to select OK.

Edit the hostname which by default is localhost.localdomain and change it to whatever you prefer.

After changing the hostname, choose okay, then the following confirmation message will appear. If the hostname is as you desire you can choose OK. You can confirm changes using the hostname command.

Using Nmcli

Nmcli is a command line tool for controlling the NetworkManager and can also be used to change the hostname.

To check the hostname with nmcli, type in your terminal:

$ nmcli general hostname

This will print out the hostname to your terminal. By default in CentOS 7 it should be localhost.localdomain.

To change this use the command:

$ nmcli general hostname grace

This will request for your password via a GUI interface. If you are running this command remotely remember to use root or sudo:

$ sudo nmcli general hostname grace

You can then check the hostname with the command hostname or nmcli general hostname.

networkstip 0

Breaking

Monday, 21 January 2019

Wednesday, 5 December 2018

Install PHP 7.2 on CentOS 7 To Resolve Clipbucket 4 Installation Problem PHP Recommend Version for Clipbucket

Enabling Remi repository

Installing PHP 7.2 on CentOS 7

Once the repository is enabled install PHP 7.2 and few most common PHP modules:

Verify the PHP installation, by typing the following command which will print the PHP version:

Installing PHP 7.1 on CentOS 7

Configuring PHP 7.x to work with Nginx

Completely remove MariaDB or MySQL from CentOS 7 or RHEL 7

Sunday, 18 November 2018

CentOS 7 SSH key for no password Authentication login with RSA Key

how to install Let's Encrypt on webmine

click on Virtual mine

click on server configuration

click on Manage SSL Certificate

click on Lets Encrypt

Finally Click on Request Certificate

How to install Modules in Webmine

How To Enable Two Factor Authentication in Virtualmin

Install Perl Packages

Pull Authen::OATH source package and Unzip it

Extract, Build & Install Authen::OATH Perl Package

Restart WebMin – Very Important.

How to disable two factor authentication in Webmin

Tuesday, 4 September 2018

How to Install Virtualmin (CentOS 7)

How Do I Install Virtualmin On CentOS 7?

Creating a New Virtual Server in Webmin/Virtualmin

Tuesday, 3 July 2018

Monday, 23 April 2018

RAID levels

Wednesday, 11 April 2018

Create And Configure Samba Shares In CentOS 7

Monday, 22 January 2018

Change a server’s hostname

Thursday, 20 October 2016

How to Change Hostname in RHEL / CentOS 7.0

Check Hostname

Edit /etc/hostname File

Using Hostnamectl

Using Nmtui

Using Nmcli

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