gdigi: 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/gdigi - from package: gdigi

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

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