If you run a mail server (which I think everyone one should for a real decentralized communication network e-mail was originally designed for) and using postfix and use dnsbl.njabl.org to lookup blacklisted hosts when processing mail, then you need to remove this host as dnsbl.njabl.org has been sunset and will no longer resolve. This will affect your mail server as it will reject all mail received. Update your postfix configuration file /etc/postfix/main.cf and remove this RBL client entry e.g:
smtpd_client_restrictions = reject_rbl_client sbl.spamhaus.org, reject_rbl_client blackholes.easynet.nl
, reject_rbl_client dnsbl.njabl.org
Then restart your postfix server
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Checkout links from Pexus Knowledge Hub related with IT, Open Source, Linux, iOS etc.
This X-Deep/32 X-Server FAQ talks about how you can leverage free Putty tool and minimalistic X Window package XFCE4 that you can install on Linux Servers such as Ubuntu Server etc, without overloading you Linux Servers running in a headless environment. Use with cost effective Pexus X-Deep/32 X-Server solution to access Linux servers securely for common administration tasks right from your Windows desktop. With X-Deep/32 you can start multiple sessions each with it’s own instance of X-Server.
If you are using Suse Linux Enterprise distribution, it is important you get your updates and patches from Novell to maintain your support and authenticity of your distribution.
Each distribution has it’s own quirks and if you have worked with a different distribution such as Red Hat, CentOS or Ubuntu, it takes a while to get around and be familiar with the updates, patches, repositories etc.
Novell has 3 distributions that may be useful for enterprise customers. Novel SLE JEOS (Suse Enterprise Linux Just Enough OS – slimmed down OS), Novell Suse Linux Enterprise (SLE) Server/Desktop and Novell Suse Linux Enterprise for VMware.
There is a new tool called zypper that lets you register and manage your updates and patch levels.
To register your product (applies to Novell Business Partners). you will have to get an activiation code. Login to your Novell site and based on your entitlements, you can obtain the registration code. Use the following command to register your SLE and refresh your zypper environment.
suse_register -a email=your_email -a regcode-sles=your_registration_code
After registration list the update repositories that are added to your zypper environment.
For more information refer:
On Linux (and UNIX) uname -a command gives the version of the kernel. Each distribution has it’s own version numbering.
For Suse SLE S/D if you want to find the version and patch level of your distribution, use the command – cat /etc/SuSE-release
Networking is the first thing you would do after installation of a Linux OS (for that matter any system OS). If you are dealing with a server, chances are you don’t have a GUI at hand. Most Linux distributions have different utilities to handle network configuration. Here are links to Novell Suse Enterprise Linux documentation.
All Novell Docs -> http://www.novell.com/documentation/index.html
SLE11 Network Configuration Link -> http://www.novell.com/documentation/sles11/book_sle_admin/data/sec_basicnet_manconf.html