transgui: 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/transgui - from package: transgui

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

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