gnatpython-rlimit: 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/gnatpython-rlimit - from package: python-gnatpython

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

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