testsaslauthd: 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/sbin/testsaslauthd - from package: cyrus-sasl

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

On Debian possible default full paths are:

/usr/sbin/testsaslauthd - from package: sasl2-bin

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

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