gribmap: 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/gribmap - from package: grads

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

On Debian possible default full paths are:

/usr/bin/gribmap - from package: grads

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

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