Possible to have a bash script/cron job automatically login to a site?

[Guest mxmaniac]

I've had situations where I'm required to log into a website every 2 weeks, or every month to keep a service active.

 

One example is no-ip, the dynamic dns service. If you don't login each month, your stuff gets deleted.

 

I'm wondering if its possible to have a cron job, that runs a bash script, that logs into a website every 10 days or so?

 

I know mostly how to do this, except for the login part. Normally your required to click the mouse on the login fields, type credentials, press enter, etc. I tried going to various sites with the plaintext type format of user(colon)password(at)sitename, but that didn't work. How can I make a bash script login to the site?

 

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