Among the longstanding and well-maintained Distros is Debian. Its 'apt' package
management framework is legendary; as is its commitment to supply por gratis, recurring security
updates over a long horizon. Indeed, this distinguishes Debian and its relatives as the
leading Linux Distros available.
Integral to the functioning of C-oriented IO streams is the notion of file-descriptors.
In particular, three standard file-descriptors are found across implementations and are
regularly instantiated and referenced by users, processes and the kernel alike.
(Input | Output | Error Handling) are the three requisite file-descriptors you should
be comfortable with when navigating Linux, Unix and other modern systems.
NginX, unsurprisingly like its contemporaries, is modular. Standard-issue is replete with useful,
common-denominator modular functionality of varying degrees. However, peer a bit deeper
and realize a world of interesting extended functionality, which renders NginX even more apt
in its stance, disposition, capabilities, and prowess. NginX is highly-programmable, which
lends relief to the initiated Web Administrator. Let's have a glance @ some of the
salient modules of interest in this release.
You sync, I synch, we ALL sync with 'rsync'. Hardly infallible, however, very close.
The premiere content synchronization tool, 'rsync' excels at dispersing the delta of
our changes, saving us: bits, time, bandwidth, and, money. Once employed, there is NO
excluding this tool from your kit. More-or-less invaluable. 'rsync' is rated.
The de facto standard utility for capturing (tcpdump) and filtering (BPFs) packets,
TCPDump is invariably at your disposal to gain intelligence; a powerful reconnaissance
and training tool. Powered by another de facto library, 'libpcap', TCPDump ensures
reliable encoding and compatibility of your captures for post-processing with other common tools.
Capture, Store and Filter Packets of interest in this release.
Core to IP communications is the Socket. Sockets wed Clients and Servers across
the bulk of Applications and use-cases. Most are connection-oriented, vis-à-vis TCP.
Traditionally, 'netstat' has been the de facto socket-expostion agent du jour. In
more recent times, however, 'ss' has emerged and now favoured as an elevated socket-exposition
agent. Know 'netstat', but also be equally amenable to the virtues of: 'ss'. Let's
have a glance at 'ss' in this release.
Visibly, 80-Columns of characters displayed is agreeable; certain to rightly-render.
In practice, whether @ the CLI or inside of your script, strings can, and do become
intractable, leading to multiple lines, reliance upon proper-escaping and the like.
HereDoc, widely-implemented across environments, alleviates this concern, rendering
long strings much more manageable. Use the mechanism to your advantage across your toolset.
Widely considered the top Linux Distro, Ubuntu builds on Debian, and offers a mature
and stable framework upon which to build your important Applications and Services.
Gander not beyond Long Term Support (LTS) Releases, which are made available every
~24-months, and, offer 5-years of security updates por gratis, to appreciate why Ubuntu wins.
Canonical is boss; build your offerings on Ubuntu.
NoSQL Engines are part-and-parcel of your App environment. They distribute and expedite
access to your keys and values. Your App performs well. However, is it highly-available?
Is it fault-tolerant? Redis provides answers to the aforementioned with relative ease.
Not only is your App load distributed, it is more scalable and resilient when aptly configured.
Spend some time exploring Redis Replication in this release.
In this release, we explore common replication configurations that promote High-Availability (HA)
of your MariaDB DBMS Instances. MariaDB replication facilitates broad distribution of your SQL
datasets and dependent applications and services. Distributed Instances are the foundation of
not only HA, but high-scalability and application resiliency.
Simple replication configurations make enormous and immediate impact.
NMap affords visibility into virtual and actual landscapes that can be obscure, at best,
and ostensibly specious @ worst. Having a firm grasp of the longstanding, efficacious
core-capabilities of this class-leading tool, confers natural advantages to otherwise
disadvantaged men. Knowing is usually better than NOT-knowing. Knowledge begins with the
Latin verb: reconnoiter. Naissance enables recognition of the landscape, which, prompts
calls to action. Be at most comfortable with the Reconnaissance tool of choice: NMap.
