Hi@akhtar,
You can change port no of httpd webserver. For that you have to set it in httpd.conf file. Follow the below given steps.
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Open /etc/httpd/conf/httpd.conf file.
 
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Search Listen 80 and replace it with Listen 82
 
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Close the file and run the below command.
 
$ semanage port -a -t http_port_t -p tcp 82