tiger: 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/sbin/tiger - from package: tiger

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

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