partitionmanager: 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/partitionmanager - from package: partitionmanager

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

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