Mr. X advised the former PM not to be a 'pilot in the cockpit whose flight can be hijacked at gunpoint.

Can anybody helps me in splitting the above sentence in two sentences ?

I don't know why "to be" is used here. I think it is an infiniitive and after the word "advise" infinitive is used with pronoun

Is it similar to word BECOME ? What is the meaining of "to be" here

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How do you want to split it?-- Mr. X advised the former PM. He said, "Don't be a 'pilot in the cockpit whose flight can be hijacked at gunpoint'."

Not become; don't act like.
1) You told me - Not become; don't act like.

Then What is the difference between the two

I want to be a doctor.

I want to become a consultant

2) Don't be a pilot.......

Does "Be" represent "become" here
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I want to be a doctor = I want to become a doctor (approximately; the latter has slightly more emphasis on the process).

In the passage you quoted, however, be has a different meaning: act like.

Don't be an idiot.
Don't be a patsy.
Don't try to be a hero

All these mean don't act like a/an idiot/patsy/hero.
You want to tell : Don't Be / not to be = act like

Am I right?

But if we do not use it in a negative sence like - Be / to be then what does it means?
No, Rajan. In the sentence and phrases I am discussing, be = act like.

All right, act like / be an idiot! Go bungee jumping!
Please act like / be a hero and get me another beer from the refrigerator.
Mr. X advised the former PM not to act like / be a 'pilot in the cockpit whose flight can be hijacked at gunpoint

Is that clear?
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Thank you so much for your patience and guiding me.

But I have one more question

1) Be Honest. Can I take this sentence as "Act Like Honest"

2) Be Sure. We can not fit Act Like in this.

3) What is the difference between "Make Sure" and "Be Sure"

Here, what does "be" mean ?
No, now you have shifted to adjective complements, where be is the copula indicating possession of a quality. The imperatives that you have listed in #1 and #2 exhort the listener to exhibit or acquire the qualities of honesty and assurance.

#3 -- Via a couple of dictionaries:

make sure: make a point of doing something; act purposefully and intentionally
be sure: careful to do something

Still, I am not sure there is much difference. Make sure sounds more active.
I am confused here. The following question has also been one of my problem.

In Imperative sentences, there is no need to mention the subject

1) Go there, Come here.

In Sr. No. 1, there is no mention of Be.

Be is a copula, a linking verb, that is used to link the subject of a sentence with its complement.

But in adjectives, we have to mention Be - like, be honest, be sure. In these sentences there is no subject then why there is a need to add BE.

I hope my question is clear.
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