sa-awl: 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/sa-awl - from package: spamassassin

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

On Debian possible default full paths are:

/usr/bin/sa-awl - from package: spamassassin

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

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