clamsubmit: 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/clamsubmit - from package: clamav

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

On Debian possible default full paths are:

/usr/bin/clamsubmit - from package: clamav

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

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