debpartial-mirror: 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/debpartial-mirror - from package: debpartial-mirror

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

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