harvest: 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/harvest - from package: ubuntu-dev-tools

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

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