artscat: 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/artscat - from package: arts

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

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