yum-security is a plugin to the Red Hat Entreprise Linux package manager yum. It helps installing only security updates (RHSA) (as opposed to bug fixes (RHBA) or enhancements (RHEA)).
Explanation of RHSA, RHBA and RHEA advisories
RHEL 7 : yum-security is part of yum
RHEL 6 :
yum install yum-plugin-security
List all available erratas without installing them :
yum updateinfo list available
List all available security updates without installing them :
yum updateinfo list security all
yum updateinfo list sec
List of the currently installed security updates :
yum updateinfo list security installed
More examples are available in this Red Hat KB article
Red Hat has been provided security information since January 2005 through different ways :
RHSA-Announce mailing list, Red Hat CVE database and Red Hat Product Errata
For a better access of their data, the Red Hat Product Security has just released a beta API. It provides more search options for accessing real-time data.
More details can be found in the post below :
Red Hat Security Blog post about their new Security Data API service
RedHat Security Data API
To see what’s inside a variable or a Perl object, Data::Dumper is often used.
For inspecting objects, its features are limited.
Data::Printer helps you dump your Perl data structures in a complete, colored and human-friendly way.
This module is not part of the Perl core modules.
To install it on Debian Buster :
apt install libdata-printer-perl
Start using it. Its syntax is simple and pretty straightforward.
For objects, it provides public/private methods details that Data::Dumper does not.
More details on Metacpan for Data::Printer
Debian provides deb packages for Vim and Vim scripts. Vim scripts are a set of addons to vim to automate repetitive tasks or adding new functionalities to the Vim editor.
This addon, closetag.vim, will be installed and enabled and ready for use when editing an HTML file.
Debian provide a central way to manage Vim addons, vim-addons-manager, system-wide or a per-user configuration.
To install it :
apt install vim-addon-manager vim-scripts
To enable it just for you :
vim-addons install closetag
A local copy of closetag.vim is created in ~/.vim/macros
To enable it in your Vim editor :
The auto-closing function is available in insert mode by typing Ctrl-_
More infos :
Debian Packaging Policy for Vim
Quick round up of the Spacewalk client configuration files :
The main configuration file is : /etc/sysconfig/rhn/rhncfg-client.conf
This file makes use of variables whose values are located in /etc/sysconfig/rhn/up2date
The server identity in Spacewalk is located in the XML file /etc/sysconfig/rhn/systemid
Two links for an in-depth explanation regarding Red Hat backporting security fixes process as well as compatibility between Red Hat security advisories and Mitre CVEs.
Backporting Security Fixes
Red Hat and CVE compatibility
Red Hat provides free access to two databases for errata and for CVE referenced in Red Hat products :
Red Hat Product Errata database
Red Hat CVE Database