Reset rhel7 root password

Reset rhel7 root password  In the RHCSA examination they ask to reset the root password, In this article we are going to learn how to reset rhel7 root user password. Whenever you type user password incorrectly it will shown an above error. Immediate After Right side of the corner there is a power button Click […]

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Local YUM server installation and configuration – RHEL7

The Yellowdog Updater, Modified (yum) is an open-source command-line package-management utility for Linux operating systems using the RPM Package Manager. Though yum has a command-line interface, several other tools provide graphical user interfaces to yum functionality.    Basically we will YUM to resolve the dependencies automatically and install them, Using YUM repository you can lot […]

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BLACKLIST AND WHITELIST FOR ZIMBRA SPAM FILTER

BLACKLIST AND WHITELIST FOR ZIMBRA SPAM FILTER   gin to console as “root” user. Edit the amavisd config file /opt/zimbra/conf/amavisd.conf.in, Add 2 lines: read_hash(\%whitelist_sender, ‘/opt/zimbra/conf/whitelist’); read_hash(\%blacklist_sender, ‘/opt/zimbra/conf/blacklist’); Create the list files: #vi /opt/zimbra/conf/whitelist example.com EOT #vi /opt/zimbra/conf/blacklist spammer@example.com EOT Restart Service: #su – zimbra -c ‘zmamavisdctl restart’

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RHEL 7 Extras

RHEL 7 Extras Introduction of Docker Docker is an open source project that automates the deployment of applications inside Linux Containers, and provides the capability to package an application with its runtime dependencies into a container. Device Hotplug Removed While RHEL 5/6 has device hotplug support (udev rule that runs the ifup script for newly […]

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RHEL7 and 6 difference

Features RHEL 7 RHEL 6 Default File System XFS EXT4 Kernel Version 3.10.x-x kernel 2.6.x-x Kernel Kernel Code Name Maipo Santiago General Availability Date of First Major Release 2014-06-09 (Kernel Version 3.10.0-123) 2010-11-09 (Kernel Version 2.6.32-71) First Process systemd (process ID 1) init (process ID 1) Runlevel runlevels are called as “targets” as shown below: […]

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