tulip: 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/tulip - from package: tulip

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

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