cdfchgrid: 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/cdfchgrid - from package: cdftools

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

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