6 ways to run python

Python language interpreter

Python interpreter can be used many ways from command line.

Beginners guide: https://wiki.python.org/moin/BeginnersGuide

Developers guide: https://devguide.python.org/

•  Call a Python interactive shell (REPL):

           python

•   Execute script in a given Python file:

           python script.py

• Execute script as part of an interactive shell:

          python -i script.py

•  Execute a Python expression:

          python -c "expression"

•  Run library module as a script (terminates option list):

          python -m module arguments

•  Interactively debug a Python script:

         python -m pdb script.py

     

8 beginners commands to start with Docker


Installation guides:


windows - https://docs.docker.com/docker-for-windows/

linux - https://docs.docker.com/engine/install/

mac - https://docs.docker.com/docker-for-mac/install/

1. List currently running docker containers:
   docker ps
   
2. List all docker containers (running and stopped):
   docker ps -a
   
3. Start a container from an image, with a custom name:
   docker run --name container_name image
   
4. Start or stop an existing container:
   docker start|stop container_name
   
5. Pull an image from a docker registry:
   docker pull image
   
6. Open a shell inside of an already running container:
   docker exec -it container_name sh
   
7. Remove a stopped container:
   docker rm container_name
   
8. Fetch and follow the logs of a container:
   docker logs -f container_name
   

gdb debugging - PART 2

gdb debugging techniques continutaion

This is a continuation from gdb part1 post -
http://naveendavisv.blogspot.com/2020/02/gdb-tips-part1.html

 - Debug an executable:
   gdb executable

 - Attach a process to gdb:
   gdb -p procID

 - Debug with a core file:
   gdb -c core executable

 - Execute given GDB commands upon start:
   gdb -ex "commands" executable

 - Start gdb and pass arguments:
   gdb --args executable argument1 argument2