arcresub: 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/arcresub - from package: nordugrid-arc-client

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

On Debian possible default full paths are:

/usr/bin/arcresub - from package: nordugrid-arc-client

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

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