pyfiglet: 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/pyfiglet - from package: python3-pyfiglet

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

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