How to create your own command in linux? for example writing helper + tab shows commands and these commands execute bash commands?

Question

bash

I simply don’t remember many commands, and I have to look all over again on the Internet, for example, I use this command very often, docker stop $(docker ps -a -q)I can’t and don’t want to remember it, I just want to helper docker stop all like this. And all commonly used commands want to do so. How can this be done?

Answer 1

You can learn the basics of bash and write your own scripts with commands and options.
You can use aliases.
Write :

alias docker_stop_all="docker stop $(docker ps -a -q)"

And when necessary, write
docker_stop_all
In this case, even auto-completion will work.
You can save this alias in .profile or .bashrc in your home directory, then it will be available as soon as you logged into the server.