today's howtos
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How to Change Directory in Linux Terminal
The terminal is a powerful tool that makes interacting with any Linux-based operating system easy. One such task that every user needs to do is navigating the file system. In Linux, to change the directory from the terminal, you can use the cd (change directory) command. This may seem like a daunting task for beginners, but fear not, as we are here to help. In this article, we explain the process to change directory in the Linux terminal.
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BGP Path Attribute Filtering - A Powerful Tool to Mitigate Alien Attributes
On 2 June 2023, there was a disruption in the global Internet routing, caused by the inability of BGP border routers to process an "alien" BGP Attribute. A nice RIPE Labs article about this event was published back then. Well, the alien turned out to be a "legal alien" - a known attribute, introduced by a Standard Track RFC, but few years later on deprecated by another, newer RFC.
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Monitor System Resources on Linux with Mission Center
Linux system monitoring tools aren’t in short supply, with everything from good-looking GUI apps through to powerful command-line software available — choice that is a boon for anyone wanting to keep a watchful eye on the health and performance of their Linux installs.
Mission Center is another valuable addition to the mix.
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Autoflash multiple Raspberry Pi Picos in no time at all
This means you can plug in, for example, ten Picos one after another, and have them flashed without the need to drag a file into the Pico drive. Perfect to streamline the preparation for workshops, computing lessons, and Raspberry Jams.
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On Internet blowback
In our Internet scanning experiments over the years, we have observed that some simple probes (for example, a TCP SYN or ICMP echo request) yield large volumes of packets in response although at most a few packets would be expected from the protocol specifications. We call this unexpected response traffic ‘blowback’.
Blowback presents a hurdle to Internet-scanning measurements as experimenters must cope with blowback bursts and distinguish the blowback from the traffic relevant to their study. More problematically, the blowback can be used as part of denial-of-service (DoS) attacks — once the attacker identifies the targets that trigger blowback, the attacker can use these targets to reflect and amplify the attacker’s traffic.
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How to Set up PostgreSQL Replication on Debian 11
PostgreSQL is a free and open-source database management system focusing on extensibility and SQL compliance. PostgreSQL is an advanced and enterprise-class RDBMS (Relational Database Management System) that supports both SQL (relational) and JSON (non-relational) querying.