Darren Ferguson was thankful to players and fans alike following the emotional 2-0 home victory over Lincoln.
The Posh chief took charge of his side following the death of his mother, Lady Cathy Ferguson, at the age of 84.
He was rewarded with a third consecutive home triumph and clean sheet which keeps them in the Sky Bet League One play-off places.
Players and fans both showed their support, with the entire Posh team celebrating David Ajiboye’s spectacular 52nd-minute opener with Ferguson.
And Joel Randall’s late clincher, his first EFL goal more than two years after arriving from Exeter, was immediately followed by loud applause from supporters in memory of Lady Ferguson throughout the 84th minute.
Lincoln should have been ahead by the break with Danny Mandroiu hitting the bar and Sean Roughan heading a glorious chance over from a corner, but then faded out of the contest.
Posh assistant boss Kieran Scarff said: “All I can say on behalf of Darren is how much he values and appreciates the support he has had from the players, the staff across the club and the fans.
“It’s always important to win football matches and perhaps there was a little bit more added to that today.
“The gaffer is delighted with the performance and the players deserve plenty of credit for it as we were very good for large periods of the game.
“We spoke at half-time about increasing the tempo of our play a bit and scoring the early goal in the second half was crucial.
“It was a great strike from David and I’m delighted for him scoring for the second home game running.
“Joel’s got the confidence and belief back. His performances have generally been good and it was great to see him scoring.
“We created a lot of chances to score more, but we’re more than happy.”
Lincoln head coach Mark Kennedy admitted: “For 45 minutes we looked like a really good team who I felt were going to win the game.
“I thought we should have been at least 2-0 up by half-time. We played really well in the first half, our counter-press was excellent, we caused Peterborough a lot of problems and turned the crowd.
“But the frustration is that we weren’t clinical enough to take our chances and the two goals we conceded in the second half were down to absolutely appalling decision-making.
“That’s the black and white of it. We had really good moments but got nothing because our decision-making then changed the course of the game.
“I said to the guys after the game that I can accept learning, but I’m not in an academy anymore. I’m now in the getting sacked business.
“We’ve got real talent in our group, but the best players in football make the best decisions.”