typop: 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/typop - from package: terminology

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

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