Question

In bash, I have to insert a new record with a valid port number(1-65535) to MySQL, the exist MySQL table haves records with some random ports value already, how can I pick up a new random port number and it does’t conflict with the exist ports value in MySQL, any smart way to do this easily?

Answer 1

you need to create a logic for that:

1. create a table with single column which has values 1 till 65535.
2. and then write a query to get the list of id’s in new table which
   are not in your working table.
3. then select the first id from the result list.