Exploring bash builtins on Linux

You probably use some bash builtins fairly often whether or not you think of them as builtins or simply as commands. After all, bash builtins are commands, but not implemented as separate executables. Instead, they are part of the bash executable. In other words, they are "built into" bash, thus the term "bash builtins".If you're looking for a particular builtin, the which command isn't going to find it for you because it only looks through a collection of executables. This includes system commands like /bin/echo as well as scripts for which you have execute permission. Here's an example of which not finding anything:To read this article in full, please click here

Exploring bash builtins on Linux

You probably use some bash builtins fairly often whether or not you think of them as builtins or simply as commands. After all, bash builtins are commands, but not implemented as separate executables. Instead, they are part of the bash executable. In other words, they are "built into" bash, thus the term "bash builtins".If you're looking for a particular builtin, the which command isn't going to find it for you because it only looks through a collection of executables. This includes system commands like /bin/echo as well as scripts for which you have execute permission. Here's an example of which not finding anything:To read this article in full, please click here

Network Break 428: Arista Announces Cloud-Based NAC; Is Google Cloud Finally Making Money?

Take a Network Break! This week we discuss a new NAC solution from Arista Networks, a new version of Central from HPE Aruba, and the latest version of NetBrain. We also cover a new XDR offering from Cisco, Google Cloud's quarterly financial results, Microsoft entanglements with EU and UK regulators, and more tech news.

The post Network Break 428: Arista Announces Cloud-Based NAC; Is Google Cloud Finally Making Money? appeared first on Packet Pushers.

Celebrating Australia’s Privacy Awareness Week 2023

Celebrating Australia’s Privacy Awareness Week 2023
Celebrating Australia’s Privacy Awareness Week 2023

When a country throws a privacy party, Cloudflare is there! We are proud to be an official sponsor of the Australian Privacy Awareness Week 2023, and we think this year’s theme of “Privacy 101: Back to Basics” is more important now than ever. In recent months, Australians have been hit with the news of massive personal data privacy breaches where millions of Australian citizens' private and sensitive data was compromised, seemingly easily. Meanwhile, the Australian Attorney General released its Privacy Act Review Report 2022 earlier this year, calling for a number of changes to Australia’s privacy regulations.

You’re probably familiar with the old-school privacy basics of giving users notice and consent. But we think it’s time for some new “privacy basics”. Thanks to rapid developments in new technologies and new security threat vectors, notice and consent can only go so far to protect the privacy of your personal data. New challenges call for new solutions: security solutions and privacy enhancing technologies to keep personal data protected. Cloudflare is excited to play a role in building and using these technologies to help our customers keep their sensitive information private and enable individual consumers to protect themselves. Investing in and offering these Continue reading

Tech Bytes: How ITQ And VMware Support Multi-Cloud And Hybrid Work (Sponsored)

Today on the Tech Bytes podcast we discuss multi-cloud deployments and supporting hybrid workers with VMware’s Workspace ONE. We’re sponsored by VMware, and we talk with VMware partner ITQ. Our guest is Johan Van Amersfoort, Technologist Digital Workspace and AI from ITQ.

The post Tech Bytes: How ITQ And VMware Support Multi-Cloud And Hybrid Work (Sponsored) appeared first on Packet Pushers.

Interesting: BGP Zombie Outbreak on Juniper Routers

BGP zombies are routes in the BGP table that refuse to disappear even though they should have been long gone. Recent measurements estimate between 0.5% and 1.5% of all routes in the global BGP table are zombies, which sounds crazy – after all, BGP is supposed to be pretty reliable.

Daryll Swer identified one potential source – Juniper routers do not revoke suppressed aggregated prefixes – and documented it in Navigating a BGP zombie outbreak on Juniper routers.

Interesting: BGP Zombie Outbreak on Juniper Routers

BGP zombies are routes in the BGP table that refuse to disappear even though they should have been long gone. Recent measurements estimate between 0.5% and 1.5% of all routes in the global BGP table are zombies, which sounds crazy – after all, BGP is supposed to be pretty reliable.

Daryll Swer identified one potential source – Juniper routers do not revoke suppressed aggregated prefixes – and documented it in Navigating a BGP zombie outbreak on Juniper routers.

Weekend Reads 042823


There has always been some concern about undersea fibers. Countries fear that sabotage of the fibers connected to their shores could result in being isolated from the Internet.


Do your employees use unauthorized SaaS apps? The average organization has over 100 SaaS apps, many unsanctioned by IT, posing a serious security risk.


A proposed permanent network of electromagnetic monitoring stations across the continental US, operating in tandem with a machine learning (ML) algorithm, could facilitate accurate predictions of geomagnetic disturbances (GMDs).


We may be seeing an equally dramatic transformation of chip design right now, this time with the use of AI to drive designs.


But for now it”s exciting to see what ChatGPT has already been able to do. At some level it”s a great example of the fundamental scientific fact that large numbers of simple computational elements can do remarkable and unexpected things.


He”s sharing the story of JSON, his discovery of JavaScript”s good parts, and his approach to finding a simple way to build software.


Back in January of this year, we studied the infrastructure of Ducktail, a malware that trailed its sights on Facebook business owners and advertisers.


The Philippines is an archipelago comprising three major island Continue reading

Heavy Networking 676: Implementing ZTNA And SASE With Fortinet (Sponsored)

Fortinet is a security vendor most of you have heard of. But if all you think of when you hear the name “Fortinet” is firewalls, well yeah, but you should think more broadly. On today's sponsored Heavy Networking we're going after the work-from-anywhere challenge with Fortinet’s Zero Trust Network Access (ZTNA) and Secure Access Service Edge (SASE) tech, all of which is baked into FortiOS. If you’re running a FortiGate, you’ve got these capabilities already.

Heavy Networking 676: Implementing ZTNA And SASE With Fortinet (Sponsored)

Fortinet is a security vendor most of you have heard of. But if all you think of when you hear the name “Fortinet” is firewalls, well yeah, but you should think more broadly. On today's sponsored Heavy Networking we're going after the work-from-anywhere challenge with Fortinet’s Zero Trust Network Access (ZTNA) and Secure Access Service Edge (SASE) tech, all of which is baked into FortiOS. If you’re running a FortiGate, you’ve got these capabilities already.

The post Heavy Networking 676: Implementing ZTNA And SASE With Fortinet (Sponsored) appeared first on Packet Pushers.

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