Tag Archives: RHEL

Mount CIFS Share on RHEL/CentOS

Some quick notes regarding mounting CIFS shares on RHEL and CentOS. Note that system-wide network filesystem mounts are typically specified in /etc/fstab and require supported kernel modules for compatible vfs filesystem types. In the case of SMB filesystems, the modern … Continue reading

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Apache Tomcat in RHEL 7

Here are some notes for using the built-in Apache Tomcat package in Red Hat Enterprise Linux (RHEL) 7. For an overview of installing and turning on Tomcat, see my previous post RHEL 7 Administration Notes. In brief, use yum to … Continue reading

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RHEL 7 Administration Notes

Red Hat Enterprise Linux 7 (RHEL 7) provides many administration enhancements and quite a few changes to the commands used to manage the system. Here are some notes for a few basic tasks. User Management Service Management Firewall Management Network … Continue reading

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Identity Management Using IPA in CentOS and RHEL

UPDATED 8 Jan 2016 to include RHEL 7 IPA (Linux Domain) document which also applies to CentOS 7. I have also added a section at the bottom for Active Directory organizations desiring to add Linux IPA client systems directly to … Continue reading

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RHEL 6.x and CentOS 6.x Cron and At Utilities

Linux System Administrators responsible for RHEL 6.x and CentOS 6.x systems need to be able to automate system tasks. The official Red Hat Enterprise Linux (RHEL) 6.x “Deployment Guide” documentation includes a good tutorial on the popular “Cron” and “At” … Continue reading

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World-Class Package Selection in CentOS and RHEL

If you use Red Hat Enterprise Linux (RHEL) or CentOS, you may have noticed that even the latest 6.x distributions lack many common packages found in more progressive systems like Fedora or Ubuntu. Thankfully there is an easy fix provided … Continue reading

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Red Hat and CentOS in Synergy

It is a beautiful thing when organizations can promote each-other resulting in a greater combined product and maximum benefit for the customer. The synergy between Red Hat Enterprise Linux (RHEL) and CentOS is an excellent example of rare cooperation and … Continue reading

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SSH Authentication by Keys

It is possible to use cryptographic keys to login to an SSH server (as an alternative to standard password authentication). I will refer to the experts on this one and send you to the CentOS wiki page for Securing SSH … Continue reading

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Text End-of-Line (EOL) Conversion

Text files do not come in a universal format. If you have ever opened a text file on Windows with Notepad and all the lines were running together – that file was probably created on a Unix or Linux system. … Continue reading

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RHEL 6 and CentOS 6 Email Server

Official Red Hat Enterprise Linux (RHEL) 6.x documentation for Email Servers is available in the RHEL 6 Doc – Chapter 17, Mail Servers. This information applies to CentOS 6 as well. The default MTA for SMTP service is now Postfix. … Continue reading

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