tea: 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/tea - from package: tea

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

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