How to Find / Search a file using CMD / Terminal Command Linux Ubuntu

1. Find file from computer using CMD / Terminal Command

sudo find / -name index.php

2. Find file from Specific Directory using CMD / Terminal Command

sudo find /var/www/html/ -name index.php

Search with jQuery / Javascript

            $('#artsearch').keyup(function(){
                var searchtext = $('#artsearch').val();
                if(searchtext.length >= 3){
                   
                    $('#photoPreview .file-row').each(function(){
                        var $this = $(this);
                        var $text = $this.find('.arttitle .name').text();
                        var indexcount = $text.indexOf(searchtext);
                        if(indexcount > -1){
                            $this.show();
                        }else{
                            $this.hide();
                        }
                    });
                }
                if(searchtext.length == 0){
                    $('#photoPreview .file-row').show();
                }
            });