big2gribex: 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 CentOS possible default full paths are:

/usr/bin/big2gribex - from package: grib_api

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/big2gribex - from package: libgrib-api-tools

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

Error in other languages:
big2gribex: bevel nie gevind nie
big2gribex: comandă negăsită
big2gribex: comando não encontrado
big2gribex: commande introuvable
big2gribex: command not found
big2gribex: käsku ei ole
big2gribex: không tìm thấy lệnh
big2gribex: komanda nerasta
big2gribex: Kommando nicht gefunden.
big2gribex: kommandot finns inte
big2gribex: komut yok
big2gribex: nie znaleziono polecenia
big2gribex: níor aimsíodh an t-ordú
big2gribex: no se encontró la orden
big2gribex: no s'ha trobat l'ordre
big2gribex: opdracht niet gevonden
big2gribex: parancs nem található
big2gribex: perintah tidak ditemukan
big2gribex: príkaz nenájdený
big2gribex: příkaz nenalezen
big2gribex: команда не найдена
big2gribex: командата не е открита
big2gribex: 命令找不到
big2gribex: コマンドが見つかりません