gamgi: 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/gamgi - from package: gamgi

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

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