Scripting in Linux--putting commands into a file so you can run them as a group—is a lot easier than running them from the command line because you don't have to figure out the process over and over again. Aliases can also be used to repeat commands easily, but are really only used for individual commands that are complex or difficult to remember.As you will see in the examples below, the bash shell provides plenty of commands for testing, looping, creating functions, and annotating your scripts.
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Juniper Networks has added features to it’s Apstra intent-based networking software it says will help customers secure and support smaller data centers at distributed edge networks. The Apstra software keeps a real-time repository of configuration, telemetry, and validation information to ensure the network is doing what IT teams want it to do.The software includes automation to provide consistent network and security policies for workloads across physical and virtual infrastructures. In addition, its baked-in analytics performs regular network checks to safeguard configurations. To read this article in full, please click here
One popular and easy-to-use tool for detecting virus infections on Linux systems is ClamAV. It's open source and free, and runs on many Linux systems, Ubuntu and Fedora included. In this post, we'll take a look at how to install and use the tool on Ubuntu, Linux Mint, and related systems. Installing ClamAV on Linux Mint
The first step for installing ClamAV on Ubuntu, Mint, and related distros should be to update your system.$ sudo apt update && sudo apt upgrade -y
After that, you can install ClamAV and verify the installation with commands like these:$ sudo apt-get install clamav clamav-daemon
$ clamscan --version
ClamAV 0.103.5/26469/Wed Mar 2 04:27:25 2-22
ClamAV commands
ClamAV's tools are clamscan to do the scanning and freshclam to update the list of known virus signatures.To read this article in full, please click here
At the agency where I work we recently bought software products that required new virtual machines, and that provided the opportunity to review some of the important basices of properly assigning the hardware memory and compute to each VM.That’s important so we stay in a failover-ready state, and in our environment, that means appropriately allocating resources of the two clustered physical hosts that run VMs for our production applications. It’s even more important now because the new software is particularly resource-intensive.What is a virtual machine?
The task also provided the opportunity to review and adjust the resources assigned to all of our existing virtual servers so they, too, were properly sized.To read this article in full, please click here
Being able to quickly identify what software is installed on your servers has value for a host of reasons. Managing software licensing costs and entitlements, planning upgrade budgets, identifying candidates for server consolidation, or even responding to security incidents are all common reasons for performing a software inventory.There are of course enterprise tools for tracking software inventory. But these tools can be expensive and complex, or could have access limited to specific groups or individuals in your organization. Fortunately PowerShell can help with some of the leg work in analyzing the software on your systems in order to help drive your planning and incident response.To read this article in full, please click here
Everyone in tech likely thinks they know what “cloud computing” and “networking” mean, but they’re probably wrong, and their misconceptions about the first topic color their view of the second. Yes, the cloud is dominating computing, but most stuff isn’t “moving to the cloud”. This subtle point is already changing how we think about networking.I’ve worked with the cloud from the first, and while there was a bit of “move this to the cloud” going on for server consolidation reasons, the overwhelming majority of stuff enterprises run in the cloud today isn’t an entire application at all. It’s the presentation layer of legacy data-center apps.Corporate transaction processing, data storage and retrieval, and analytics are all things that demand security and reliability. From the first, enterprise executives have been telling me that these activities aren’t going to move to the cloud because they believe that their requirements can’t be met, and the cost would be greater rather than lower. My work with them proves out that view. Despite all the hype about the economy of scale of the cloud providers, the fact is that most enterprises achieve economies close enough to those of the cloud that the difference wouldn’t Continue reading
Microsoft announced a range of new carrier infrastructure offerings through Azure, including services for private 5G enterpise networks, at this week’s Mobile World Congress, in a move designed to bolster the company’s position as a partner to the telecom industry as 5G and edge computing deployments progess.To read this article in full, please click here
At this year's Intel's investors' day meeting with Wall Street analysts, CEO Pat Gelsinger revealed new road maps for Xeon CPUs and Xe GPUs that you would typically expect to see reveals at an IDF show that stretches through 2024.Most notable about the Xeon news is that for the first time, Intel is bifurcating the processor line into two microarchitecture types. The two types are a continuation of the current design, and a whole new architecture based on the Alder Lake hybrid architecture currently used in client CPUs.[Get regularly scheduled insights by signing up for Network World newsletters.]
Adler Lake uses a different core design than traditional Intel CPUs have used. Up to now, Intel cores have all been the same, identical. But Adler Lake uses two types of cores; the performance core used to do the computing, and the efficient core, used to do small background tests that don’t require a high-performance core. This is hardly an original design; Arm has been doing for years.To read this article in full, please click here
One of the things that I have always loved about Unix and then Linux is how it allows me to connect a series of commands together with pipes and get a lot of work done without a lot of effort. I can generate the output that I need in the form that I need it. It's not just the existence of the pipes themselves, but the flexibility of the Linux commands. You can run commands, select portions of the output, sort the results or match on specific strings and you can pare the results down to just what you want to see.In this post, we're going to look at a couple commands that demonstrate the power of the pipe and how easily you can get commands to work together.To read this article in full, please click here
(Enterprise Management Associates has published “The Future of Data Center Network Automation” based on a survey of enterprises, cloud providers and network service providers. This article by EMA Vice President of Research Networking Shamus McGillicuddy details some of its major findings.)More than 86% of companies expect their budgets for data-center network automation to increase over the next two years, and with spending ramping up, network teams need to plan carefully. Network automation is notoriously difficult to implement due to the complexity of networks in general, and only 23% of the people surveyed were fully confident in their data-center network-automation strategies.To read this article in full, please click here
Here’s one none of us saw coming: Intel is planning to launch a chip specifically designed for blockchain acceleration, including the mining Bitcoins, and much more. Intel has also announced the formation of a new custom compute group within its graphics business unit to develop the chip.In the blog post, Raja Koduri, senior vice president and general manager of the Accelerated Computing Systems and Graphics Group, announced the ASIC without using the Bonanza Mine name that would accelerate the algorithm specifically used in Bitcoin mining and blockchain in general.To read this article in full, please click here
In this Linux tip, we’re going to look at the expand command. It's used to replace tabs in text files with space characters (sometimes referred to as "blanks").
The host command on Linux systems can look up a variety of information available through the Domain Name System (DNS). It can find a host name if given an IP address or an IP address if given a host name plus a lot of other interesting details on systems and internet domains.The first query below tells us that the system associated with the address 192.168.0.18 is named “dragonfly”. The second tells us that 192.168.0.1 is the default router.$ host 192.168.0.18
18.0.168.192.in-addr.arpa domain name pointer dragonfly.
$ host 192.168.0.1
1.0.168.192.in-addr.arpa domain name pointer router.
To do the reverse, you can use commands like these:To read this article in full, please click here
JPMorgan Chase & Co. spent $2 billion on new data centers last year, even as the multinational investment banking and financial services company continued to move data and applications to cloud platforms run by AWS, Google, and Microsoft.The $2 billion is part of the firm’s total annual spending on technology, which amounted to more than $12 billion last year, according to details shared in JPMorgan Chase’s fourth-quarter and full-year 2021 earnings presentation. Looking at the current year, the firm expects to increase its tech spending to roughly $15 billion. IT priorities in 2022 will be consistent with prior years and will include increases in cloud capabilities, data centers, digital consumer experience, and data and analytics.To read this article in full, please click here
Data centers are a critical, but often power-hungry, part of the enterprise. But, why exactly do data centers require so much energy? And how can businesses address emissions concerns as well as cut back on the costs associated with cooling data centers? Ashish Nadkarni, group vice president within IDC's Worldwide Infrastructure Practice, joins Juliet to discuss the status of data center efficiency, what it means within the context of green IT and how technology has advanced to make servers more efficient.
Global capital expenditure on data center infrastructure is set to grow by 10% over the next five years, to a total of $350 billion by 2026, in spite of the general move toward cloud in the enterprise, according to a report released earlier this month by Dell’Oro Group.Part of that spending growth will be driven by hyperscalers like Google, Amazon and Microsoft buying up data center equipment for their own public clouds, but an underrecognized trend is that the cloud isn’t for every organization, according to the report’s author, research director Baron Fung.To read this article in full, please click here
In this Linux tip, we’re going to look at the seq (sequence) command. It provides a very easy way to generate a sequence of numbers and gives you a lot of control.
The Linux fold takes lines of text and breaks them into chunks based on the arguments that you provide. With no arguments, fold will break lines at 80 characters.The first example below uses a single-line text file that includes indications of character positions. First, we count the number of characters and lines in the file using the wc -l and wc -l command:$ wc -c wide_text
251 wide_text
$ wc -l wide_text
1 wide_text
So, this file has 251 characters (including a carriage return) and a single line of text. Next, we display the file using the cat command:To read this article in full, please click here
Now it is official Nvidia has announced that its proposed acquisition of ARM Holdings from SoftBank Group Corp. has been terminated.The parties agreed to terminate the agreement because of “significant regulatory challenges preventing the consummation of the transaction,” despite considerable efforts by the parties to assuage concerns over the deal.[Get regularly scheduled insights by signing up for Network World newsletters.]
Arm will now start preparations for an initial public offering (IPO), possibly during the fiscal year ending March 31, 2023.To read this article in full, please click here