[CentOS] Inquiry:iptables ?

[hadi motamedi]

Dear All
To open a port , I know that I need to go to "System -> Administration ->
Security Level and Firewall" -> Other ports and then I can open port-5901 as
tcp protocol . Can you please do me favor and let me know how it can be done
from the command line (if my CentOS is text-mode installed) ? (perhaps via
iptables?)
Let me thank you in advance
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