ascii2uni: 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/ascii2uni - from package: uni2ascii

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

Error in other languages:
ascii2uni: bevel nie gevind nie
ascii2uni: comandă negăsită
ascii2uni: comando não encontrado
ascii2uni: commande introuvable
ascii2uni: command not found
ascii2uni: käsku ei ole
ascii2uni: không tìm thấy lệnh
ascii2uni: komanda nerasta
ascii2uni: Kommando nicht gefunden.
ascii2uni: kommandot finns inte
ascii2uni: komut yok
ascii2uni: nie znaleziono polecenia
ascii2uni: níor aimsíodh an t-ordú
ascii2uni: no se encontró la orden
ascii2uni: no s'ha trobat l'ordre
ascii2uni: opdracht niet gevonden
ascii2uni: parancs nem található
ascii2uni: perintah tidak ditemukan
ascii2uni: príkaz nenájdený
ascii2uni: příkaz nenalezen
ascii2uni: команда не найдена
ascii2uni: командата не е открита
ascii2uni: 命令找不到
ascii2uni: コマンドが見つかりません