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Rafael Moyano rmoyano

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rmoyano / pipenv.md
Last active June 14, 2024 05:09
Pipenv cheatsheet

Pipenv cheatsheet

Installation

Install pipenv package and dependencies:

user@notebook:~/repos/pipenv$ pip install pipenv
Defaulting to user installation because normal site-packages is not writeable
Collecting pipenv
  Downloading pipenv-2023.12.1-py3-none-any.whl (3.1 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 3.1/3.1 MB 9.8 MB/s eta 0:00:00
@rmoyano
rmoyano / curl.md
Last active June 14, 2025 11:42
Curl cheatsheet

CURL cheatsheet

GET query

rmoyano@thinkpad:~/code/horarios$ curl http://127.0.0.1:8000/
{"Hello":"World"}

Get the header response




  


  




    


          
    

      

        
        

          

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                rmoyano
                / nmap.md
            
            

              Last active
              June 3, 2024 17:01
            

          

        

      

        

  

      

    
Nmap cheatsheet


Tests


Basic test using Google IP:


user@notebook:~$ nmap 8.8.8.8
Starting Nmap 7.80 ( https://nmap.org ) at 2024-06-03 13:52 -03
Nmap scan report for dns.google (8.8.8.8)
Host is up (0.027s latency).
Not shown: 998 filtered ports



  


  




    


          
    

      

        
        

          

              @rmoyano
          

          

            
                rmoyano
                / docker.md
            
            

              Created
              June 14, 2024 05:23
            

              
                Docker notes
              
          

        

      

        

  

      

    
Docker notes


Entrypoint and CMD differences


One SO thread.


From Devopscube article:




In a Dockerfile, ENTRYPOINT and CMD are two different instructions that are used to define how a container should run.






ENTRYPOINT is used to specify the main command that should be executed when a container is started using the image. The default ENTRYPOINT command is /bin/sh -c.





  


  




    


          
    

      

        
        

          

              @rmoyano
          

          

            
                rmoyano
                / apt.md
            
            

              Last active
              June 9, 2025 13:26
            

              
                APT
              
          

        

      

        

  

      

    
Installation


Assume yes to all prompts:


$ apt-get install ca-certificates curl -y


apt-get -y install
One side effect of using -y is that it will skip downgrades, whereas if the user entered y, it would perform the downgrades.
So if you want -y to execute the same thing as a user entering y,you also need to add --allow-downgrades



  


  




    


          
    

      

        
        

          

              @rmoyano
          

          

            
                rmoyano
                / flossbooks.md
            
            

              Last active
              June 25, 2025 20:29
            

              
                Best GNU/Linux open free books
              
          

        

      

        

  

      

    
Best GNU/Linux open free books


General books


The Linux Command Line: One of the best Linux books I have ever read. Written by William Shotts.


Distros


Debian


The Debian Administrator's Handbook: This book
teaches the essentials to anyone who wants to become an effective and independent Debian GNU/Linux administrator. Written by Raphaël Hertzog and Roland Mas.



  


  




    


          
    

      

        
        

          

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                rmoyano
                / shellscripting.md
            
            

              Created
              February 24, 2025 16:58
            

              
                Shell scripting
              
          

        

      

        

  

      

    
Difference between "#!/usr/bin/env bash" and "#!/usr/bin/bash": Official Slackware book created by David Cantrell, Logan Johnson & Chris
Lumens. Version 2.0 is a draft that is in development.


Because /usr/bin/env can interpret your $PATH, which makes scripts more portable.

#!/usr/bin/env bash #lends you some flexibility on different systems

Running a command through /usr/bin/env has the benefit of looking for whatever the default version
of the program is in your current environment.


Will only run your script if python is installed in /usr/local/bin.