asdfg: 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/asdfg - from package: aoeui

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

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