clamd-status.sh: 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/clamd-status.sh - from package: clamav-unofficial-sigs

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

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