rascat: 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/rascat - from package: ncl

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

On Debian possible default full paths are:

/usr/bin/rascat - from package: ncl-ncarg

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

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