Shell Programming and Scripting

while read line
do
   printf "%s\n" "${line##*/}"
done < file

awk '{gsub("\n[^\n]*/",","); sub(",","\n")}1' RS= ORS='\n\n' file

awk '{gsub("\n[^\n]*/",",");       #### gsub, it's an awk's in-built keyword which is used for global substitutions, it's format is gsub(/pattern/string which needs to be replaced/,"new pattern or string which will replace old one",line/variable_name). So here we are giving regex like catch pattern \n to till "/" but we are using *(which is greedy character) to so to tell regex that it should stop till (//myurl/bla/blabla"/"1234) this quoted/bold /(slash) we are giving here [^\n] means till it is not equal to \n in simple language. 
                                        So it substitutes from titleA\n//myurl/bla/blabla/1234 to titleA,1234 and so on.
sub(",","\n")}                     #### using sub here(which same as gsub) only difference is it will only do substitution for very first match of regex, so here (output of above gsub will be like) "titleA,1234,6789" so it will change it to titleA\n1234,6789" (where \n is new line in console it will show on line, I am putting this as \n for understanding purposes.
1'                                 #### awk works on basis of condition and action, so by putting 1 we are telling awk to make condition to TRUE and not mentioning any action here so default action will happen that is printing the line.
RS= ORS='\n\n' file                #### Mentioning RS(record separator) and ORS(Output record separator) as newline newline means two new lines continuously, so that lines titleA\nhttp://myurl/bla/blabla/1234\nhttp://myurl/bla/blabla/6789 should be considered as a single record and we could do our above mathematics, mentioning Input_file name too then.