Use these instructions to configure a CentOS/RHEL virtual machine (VM) as a web server in Microsoft Azure. This simple web server can process HTTP requests. The setup So we are using the below environment for the purpose of this post. Microsoft Azure CentOS/RHEL 6 or 7 VM (Cloud Access or Azure On-Demand) NGINX Installing an NGINX Web Server Before You Begin Installing an NGINX web server requires access to certain RHEL repositories. Make sure you have access to EPEL repositories … [Read more...] about How to Setup a Simple NGINX Web Server in Microsoft Azure
Archives for January 2019
How to Setup a Simple Apache httpd Web Server in Microsoft Azure
Use these instructions to configure a CentOS/RHEL virtual machine (VM) as a web server in Microsoft Azure. This simple web server can process HTTP requests. The setup So we are using the below environment for the purpose of this post. Microsoft Azure CentOS/RHEL 6 or 7 VM (Cloud Access or Azure On-Demand) Apache httpd Installing an Apache httpd Web Server Before You Begin Installing an Apache httpd web server requires access to certain RHEL repositories. Make sure you have access … [Read more...] about How to Setup a Simple Apache httpd Web Server in Microsoft Azure
How to Join or Authenticate Linux Server to Windows Active Directory
Setup Information So we have the below setup of Windows FQDN wo which we need to authenticate from our Linux Servers. DOMAIN = WINAD.LOCAL AD FQDN = adsrv.winad.local There are three ways to authenticate Linux system with AD Using sama and krb5 Using adcli with krb5 and sssd Using realmd with krb5 and sssd Method 1 - Using SAMBA and krb5 Install required packages Required Packages - Install below packages using package manager such as yum or … [Read more...] about How to Join or Authenticate Linux Server to Windows Active Directory
/var/cache/yum Constantly Filling Files System in CentOS/RHEL
This post explains how to free up space when files under /var/cache/yum is filling up the disk space. This is normal behavior as the cache would increase its size based on the frequency of syncing with the yum server. Its an administrative task provide adequate space. This should be corrected by either running: # yum clean all The above command cleans all cached files from any enabled repository. It is useful to run this from time to time to make sure there is nothing using unnecessary … [Read more...] about /var/cache/yum Constantly Filling Files System in CentOS/RHEL
How to Configure YUM to connect to Oracle Public Repository in Oracle Enterprise Linux
This post will assist you in configuring an OEL system to connect to the Oracle Public YUM repositories. Your OEL System must have a working connection to the internet for YUM to work correctly. If your system is isolated from the internet due to security policies, you will need to set up a local repository and populate it manually. To configure your OEL system to use the Oracle Public YUM Repository, accomplish the following actions as root. 1. Checking YUM Configuration 1. Change to … [Read more...] about How to Configure YUM to connect to Oracle Public Repository in Oracle Enterprise Linux
How To Retain Current And Older Linux Packages While Doing Update With ‘yum’ Command
In this post, we shall discuss about how to retain current and older Linux packages while updating the Linux OS with the 'yum' command. Note that /etc/yum.conf configuration file contains a [main] section. If required then we can add many additional options under the [main] section. Some of the key-value pairs in the [main] section affect how yum operates. A sample /etc/yum.conf configuration file looks as below: # cat … [Read more...] about How To Retain Current And Older Linux Packages While Doing Update With ‘yum’ Command
What is SSH? What are SSH authentication methods?
SSH overview The SSH protocol (aka Secure Shell) is used to establish secure and reliable communications between two hosts. It supports different authentication methods and uses strong encryption to protect exchanged data. It is possible to use SSH-based communications instead of clear-text remote CLI protocols (telnet, rlogin) and unencrypted file transfer methods (such as FTP). It is also possible to use SSH for forwarding or tunneling a port, X forwarding, building VPN, as a SOCKS proxy and … [Read more...] about What is SSH? What are SSH authentication methods?
How to change the order of the authentication methods of ssh in CentOS/RHEL
Want to change the order of the authentication method that ssh tries while establishing a remote connection. How to change it? How to specify the order in which the client should try the protocol of authentication methods while establishing a connection with the remote host? Changing Order of Authentication Methods of SSH PreferredAuthentications is the option which specifies the order in which the client should try the protocol of authentication methods. This allows a client to prefer one … [Read more...] about How to change the order of the authentication methods of ssh in CentOS/RHEL
How to force the users to use both key and password with ssh in Linux
How to enable dual authentication in ssh? How to force the users to use both key and password with ssh while authenticating in Linux. By default, sshd will not force dual authentication. In order to force ssh for dual authentication follow the steps outlined below. For CentOS/RHEL6 Add following directive to /etc/ssh/sshd_config configuration file. # vi /etc/ssh/sshd_config RequiredAuthentications2 publickey,password To disable dual authentication for particular user, add on extra … [Read more...] about How to force the users to use both key and password with ssh in Linux
How to Setup a squid proxy server on CentOS/RHEL 7
Squid is a web proxy application with a variety of configurations and uses. Squid has a large number of access controls and supports different protocols, such as HTTP, HTTPS, FTP, and SSL. In this post, we will see how to use Squid as an HTTP proxy. The Setup A proxy server can be software or it can also be hardware, such as a bluecoat proxy. In this post, we will setup a proxy as software on a virtual device. The chosen software will be squid, but you can use a wide range of other … [Read more...] about How to Setup a squid proxy server on CentOS/RHEL 7