Writings and ramblings on Linux for those who are addicted to it!
https://www.amazon.com/dp/B0BSCZHTMH/
The world of Linux is complicated and intricate. Therefore, in order to understand and maneuver through this vast technology and business environments platform, knowing the proper terminology from A-Z will prove valuable. Each entry is explained with useful parameters, options and examples when relevant.
The following are some key aspects to think about in regard to Linux data and how it is utilized:
1) How do you currently ingest your needed data in order to effectively monitor the environment?
2) How do you know or consider what is normal performance aspects?
3) How do you achieve your stated statement of downtime/uptime agreements?
4) How do you leverage your data to know what projects are successful and which are not?
When writing any kind of specifications for Linux, the following are core and key aspects to include:
1) Benefits of the command, functionality, process, tool, utility etc.
2) Cost of the command, functionality, process, tool, utility etc.
3) Requirements of the command, functionality, process, tool, utility etc.
4) Functional specification of the command, functionality, process, tool, utility etc.
5) High level design of the command, functionality, process, tool, utility etc.
6) Low level design of the command, functionality, process, tool, utility etc.
7) Test specification of the command, functionality, process, tool, utility etc.
8) Future roadmap of the command, functionality, process, tool, utility etc.
The following are three key aspects to be aware of when managing a Linux infrastructure:
1) Have you invested enough in education and planning of the Linux environment?
2) Have you invested the proper amount of time to account for changes in the environment?
3) Have you set clear and specific expectations for the environment?
The following are five reasons why Linux is complicated and how to overcome each:
1) Kernel - understanding the kernel and the vision behind it and how it works will serve one well.
2) Security - understanding the use of groups and the chmod based permission sets will serve one well.
3) Operating system - understanding which distribution of Linux works for you and your organization will serve one well.
4) Command line - understanding which commands are best to leverage and learn for the functionality you need will serve one well.
5) Scripting - understanding shell scripting and which shell script works for the functionality you need will serve one well.
The following are four key thoughts on the technology impact of Linux:
1) Technology impact - by leveraging Linux you gain a more robust operating system.
2) Design and development impact - by leveraging Linux you gain a system where you can have flexibility on the design and development aspects.
3) Security - by leveraging Linux you have a more secure operating system.
4) Effective use of tools - by leveraging Linux, you have a system that has many tools and utilities for a wide range of aspects across a wide spectrum of businesses.
The following are four key thoughts on how best to organize Linux knowledge:
1) Systems - think about how your own system can and should be organized.
Could be what is your folder structure, applications needed, utilities needed, etc?
2) Network - think about how your network can best be utilized.
Could be do you need to use wireless or hard-wired based framework?
3) Creating media - think about what media is needed for your Linux operation.
Could be do you need to create a website, blog or other electronic media to enhance customer reach?
4) Programming - think about what shell is best for you to utilize for your scripting.
Could be do you need to use the bash shell or the csh shell or even a language such as C to obtain what you need to?
cal – command which has the ability to display a 12 month calendar beginning in January.
-j parameter is for Julian dates (shows days numbered 1 to 365 starting from January 1).
-y parameter is for the display of the entire current year.
[month][year] options to display a calendar applicable to the month and year given.
Examples:
cal
cal -j
cal -y
cal 01 2000
The following is a Linux dictionary word of the day:
cache – a small fast memory holding recently accessed
data, designed to speed up subsequent access to the same data.
The following is a Linux dictionary word of the day:
C Shell – shell written to look similar to the C programming language. The program name is csh.
break – shell script variable which accounts for exiting from a loop
n option number of how many times loop runs, the default is 1.
Example:
#!/bin/bash
for
((i=1;i<=5;i++)); do
echo $i
if [ $i -eq 3 ]; then
break
fi
done
The following is a Linux dictionary word of the day:
bind – set, display and assign functions and macros to a key or a sequence of keys and function bindings.
This is utilized so that it is known what functions occur when certain keys are pressed.
-l parameter to list names of functions.
-P parameter to list function names and bindings.
Example: bind -l
