tao: 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/tao - from package: taopm

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

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