Cheatsheets!

(no actual cheating, just short and skinny mnemonics for software usage and programming concepts)

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1. Python
   1.1. Basic Python
   1.2. Python DataScience basic lists
   1.3. Python Numpy
   1.4. Matplotlib
   1.5. Python Pandas Data Wrangling
   1.5.1. Python Pandas Basic
   1.5.1. Python Pandas Intermediate
   1.6. Scikit Learn
   1.6.1. Scikit Learn For Data Science
   1.7. Python Intermediate Overapi.com
   1.8. Scipy Python Library

2. Java
   2.1. Java Basics
   2.2. Java File Handling

3. Vi
   3.1. Vi cheatsheet

4. Regular Expressions
   4.1. Regular Expressions Python max condensed
   4.2. Regular Expressions Python3
   4.3. Regular Expressions Java
   4.4. Regular Expressions PCRE

5. Linux
   5.1. Basic Linux
   5.2. Linux Observability
   5.3. Unix Readline
   5.4. GNU Readline Emacs

6. Bash
   6.1. Bash Navigation
   6.2. Bash Commands
   6.3. Terminal Symbols

7. SQL And Database
   7.1. SQL Cheatsheet
   7.2. Vanilla SQL Basics
   7.3. Postgresql Basics

8. Partitioning
   8.1. fdisk help

9. Big O Notation
   9.1. ByteByteGo Cheatsheet Big O Notation
   9.2. Big O Notation the Graphic

Assimilate these next:

Github
Github markdown
HTML
Html tags

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<a name="python"></a>

1. Python

<a name="basic_python"></a>

1.1. Beginner Python

<a name="python_data_science_basic_lists"></a>

1.2. Python DataScience basic lists

<a name="python_numpy"></a>

1.3. Python Numpy

<a name="matplotlib"></a>

1.4. Python Library Matplotlib

<a name="python_pandas"></a>

1.5. Python Pandas Data Wrangling

<a name="python_pandas_basic"></a>

1.5.1. Python Pandas Basic

<a name="python_pandas_intermediate"></a>

1.5.2. Python Pandas Intermediate

The most important aspect of Pandas dataframes and numpy arrays, is its multicore C++ accellerated indexing and array slicing described here:<br> <a href="https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html">https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html</a><br>

<a name="scikitlearn"></a>

1.6. Scikit learn

<a name="scikitlearn_for_data_science"></a>

1.6.1. Scikit Learn for Data Science

<a name="python_intermediate_overapi"></a>

1.7. Python Intermediate Overapi.com

10 page PDF can't be broken out as images: <a href="./python_cheatsheet_overapi.com.pdf">python_cheatsheet_overapi.com.pdf</a>

<a name="scipy_library"></a>

1.8. Python Library SciPy

<a name="java"></a>

2. Java

<a name="java_basics"></a>

2.1. Java Basics

<a name="java_file_handling"></a>

2.2. Java File Handling

<a name="vi"></a>

3. Vim cheatsheet

<a name="vi_cheatsheet"></a>

3.1. Vi cheatsheet

Text version, all commands https://github.com/sentientmachine/Cheatsheets/blob/master/vim_cheat_sheet.txt

<a name="regular_expressions"></a>

4. Regular Expressions

<a href="http://www.rexegg.com/regex-quantifiers.html#tempered_greed">http://www.rexegg.com/regex-quantifiers.html#tempered_greed</a>

<a name="regular_expressions_python_maxcondensed"></a>

4.1. Regular Expressions Python Maxcondensed

<a name="regular_expressions_python3"></a>

4.2. Regular Expressions Python

<a name="regular_expressions_java"></a>

4.3. Regular Expressions Java

<a name="regular_expressions_pcre"></a>

4.4. Regular Expressions PCRE

<a name="linux"></a>

5. Linux

ubuntu,SUSE,Fedora,PCLinuxOS,MEPIS,Mandriva,Debian,Damn,Sabayon,Slackware,KNOPPIX,Gentoo,Zenwalk,Mint,Kubuntu,FreeBSD,Puppy,Freespire,Vector,Dreamlinux,CentOS,Arch,Xandros,Elive,SLAX,Red,BSD,KANOTIX,Nexenta,Foresight,GeeXboX,Frugalware,64,SystemRescue,Novell,Solaris,BackTrack,KateOS,Pardus

<a name="basic_linux"></a>

5.1. Basic Linux

<a name="linux_observability"></a>

5.2. Linux Observability

<a name="unix_readline"></a>

5.3. Unix Readline

<a name="gnu_readline_emacs"></a>

5.4. GNU Readline Emacs

<a name="bash"></a>

6. Bash

<a name="bash_navigation"></a>

6.1. Bash Navigation

get closer to the metal with:

<a href="https://www.tldp.org/LDP/abs/html/io-redirection.html">https://www.tldp.org/LDP/abs/html/io-redirection.html</a>

<a name="bash_commands"></a>

6.2. Bash Commands

This breaks the spirit of this page, break this out as an image: <a href="https://github.com/sentientmachine/awesome-cheatsheets/blob/master/languages/bash.sh">https://github.com/sentientmachine/awesome-cheatsheets/blob/master/languages/bash.sh</a> <br><br> <a href="http://www.catonmat.net/download/readline-emacs-editing-mode-cheat-sheet.pdf">http://www.catonmat.net/download/readline-emacs-editing-mode-cheat-sheet.pdf</a><br>

<a name="terminal_symbols"></a>

6.3. Terminal Symbols

<a href="https://linuxhint.com/bash_append_array/">https://linuxhint.com/bash_append_array/</a><br> <br>

https://www.youtube.com/watch?v=qI8eAlteW9E

<a name="database"></a>

7. Database

<a name="interviewbit_sql_cheatsheet"></a>

7.1. InterviewBit SQL Cheatsheet

A 48 page masterful condensed PDF of SQL, can't be broken out as images: Source: <a href="https://www.interviewbit.com/sql-cheat-sheet/">https://www.interviewbit.com/sql-cheat-sheet/</a>

Backup right click download: <a href="./interviewbit_sql_cheatsheet.pdf">interviewbit_sql_cheatsheet.pdf</a>

And a great learn-sql practice site: <a href="http://sql-practice.com">http://sql-practice.com</a><br>

<a name="sql_basics"></a>

7.2. Vanilla SQL Basics

<a name="postgresql_basics"></a>

7.3. Postgresql Basics

Full PSQL-syntax walkthrough course for beginners by FreeCodeCamp.org

<a href="https://www.youtube.com/watch?v=qw--VYLpxG4">https://www.youtube.com/watch?v=qw--VYLpxG4</a><br>

<a name="partitioning"></a>

8. Partitioning

<a name="fdisk_help"></a>

8.1. Fdisk help

<a name="big_o_notation"></a>

9. Big O Notation.

<a name="big_o_notation_by_bytebytego"></a>

9.1. ByteByteGo's cheatsheet on big o notation

<a name="big_o_notation_graphic"></a>

9.2. Big O Notation, the only graphic you need

red is bad, green is good.

Assimilate these:

Apache .htaccess Rewrite Rules cheat sheet:

http://htaccesscheatsheet.com

http response code cheatsheet, 404, 500, 200, etc

https://github.com/abraztsov/http-simple-cheatsheet

Github markdown cheatsheet:

<a href="https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet">https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet</a><br>

<a name="html"></a>

HTML

<a name="html_tags"></a>

HTML tags

This breaks the spirit of this page, break this out as an image:

<a href="./html_cheatsheet.pdf">html_cheatsheet.pdf</a>

Swag images

A man's beard must reach at least his nipples, and be at least 5% cheetos, to successfully compile the Gentoo OS from source. Check it: dual stacked Nvidia 2080TI GPU's.

Good enough (and provably so) decisions per second, is exchangable for money. Double up case airflow, these produce 115 Centigrade in a second of full tilt.

<a href="https://wiki.gentoo.org/wiki/G