I am new for psql. I got from my server data.dump file. I need to restore it in my local. I tried these commands.

i) psql -U postgres dbname -f servicedb.dump

Error:
      psql: warning: extra command-line argument "-f" ignored
      psql: warning: extra command-line argument "servicedb.dump" ignored

ii) psql -U postgres dbname < servicedb.dump

 Error:
              ^
 ERROR:  syntaxe error at or near "☺"
 LINE 1: ☺☺

What is this ".dump" file and how to restore it?

postgresql dump database-restore
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