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I tried to list the content of a directory using the following command:

$ ls


When I inserted -p:

$ ls -p


I got forward slashes (/) after each directory name. What is the goal of -p...

I tried opening .bash_profile using the following command:

$ open .bash_profile

Some people use the following form:

$ open -e .bash_profile

What is the difference between the two although...

I'm using Terminal in MAC OS X, and new to this.

I don't know what happened to the path. I always get "command not found".

For example, this is some of what I get:

-bash: ls: command not...

The thing I'm not getting is changing the behavior of the command through -0, which is an option.

Can you illustrate this?

Thanks for your replies.

I'm really kind of new to those things.

Can you kindly clarify what you mean by -0 is an "Option"?

Is there an example of its usage that clarifies this meaning?
...

I'm trying to set an admin password for MySQL using the following command:

$ /usr/local/mysql/bin/mysqladmin -u root -p new_password

But, I get the following error message?
...

When we write a Unix command for example like this:

curl -0 ........

What is meant by "-0"?

Thanks.