argv0: 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/argv0 - from package: ucspi-tcp-ipv6
/usr/bin/argv0 - from package: ucspi-tcp

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

Error in other languages:
argv0: bevel nie gevind nie
argv0: comandă negăsită
argv0: comando não encontrado
argv0: commande introuvable
argv0: command not found
argv0: käsku ei ole
argv0: không tìm thấy lệnh
argv0: komanda nerasta
argv0: Kommando nicht gefunden.
argv0: kommandot finns inte
argv0: komut yok
argv0: nie znaleziono polecenia
argv0: níor aimsíodh an t-ordú
argv0: no se encontró la orden
argv0: no s'ha trobat l'ordre
argv0: opdracht niet gevonden
argv0: parancs nem található
argv0: perintah tidak ditemukan
argv0: príkaz nenájdený
argv0: příkaz nenalezen
argv0: команда не найдена
argv0: командата не е открита
argv0: 命令找不到
argv0: コマンドが見つかりません