saslpluginviewer: 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 Debian possible default full paths are:

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

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

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