giggle: 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/giggle - from package: giggle

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

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