grib-parser: 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/grib-parser - from package: grib_api

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

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