xgridfit: 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/xgridfit - from package: xgridfit

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

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