who-permits-upload: 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-permits-upload - from package: devscripts

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

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