The Blues are heavy favourites to defeat their non-league opponents, sitting 57 places higher in the football pyramid.
Pompey are fourth in League One while the the Linnets are 13th in the National League standings.
But Kenny Jackett will treat his side's opponents with as much respect as any other team they’d face.
The Pompey boss has admitted he’ll be fielding a strong side in a bid to reach the third round for a third successive season.
However, he did admit he could give some players who he feels need a breather a rest ahead of a long trip to Blackpool on Tuesday.
We’ve predicted the Blues’ starting line-up and bench to face King’s Lynn...
9. Left-midfield - Ronan Curtis
There's not too many other options on the left wing with Michael Jacobs still out, while Curtis has been in good form and will want to continue that. Photo: Joe Pepler
10. Striker - Ellis Harrison
The striker's started the past two games and will be looking to get himself back among the goals. Photo: Joe Pepler
11. Striker - John Marquis
On 11 goals for the season and will be licking his lips to add to his tally against non-league opposition. Photo: Joe Pepler
12. Sub 1 - Alex Bass
Likely his next game will be against Cheltenham in the Papa John's Trophy barring an injury to Craig MacGillivray. Photo: Joe Pepler