PerseusD: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/PerseusD - from package: ampliconnoise

You may install the required package with command apt-get install {package}

Error in other languages:
PerseusD: bevel nie gevind nie
PerseusD: comandă negăsită
PerseusD: comando não encontrado
PerseusD: commande introuvable
PerseusD: command not found
PerseusD: käsku ei ole
PerseusD: không tìm thấy lệnh
PerseusD: komanda nerasta
PerseusD: Kommando nicht gefunden.
PerseusD: kommandot finns inte
PerseusD: komut yok
PerseusD: nie znaleziono polecenia
PerseusD: níor aimsíodh an t-ordú
PerseusD: no se encontró la orden
PerseusD: no s'ha trobat l'ordre
PerseusD: opdracht niet gevonden
PerseusD: parancs nem található
PerseusD: perintah tidak ditemukan
PerseusD: príkaz nenájdený
PerseusD: příkaz nenalezen
PerseusD: команда не найдена
PerseusD: командата не е открита
PerseusD: 命令找不到
PerseusD: コマンドが見つかりません