who-uploads: 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/who-uploads - from package: devscripts

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

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