slptool: 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/slptool - from package: openslp

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

On Debian possible default full paths are:

/usr/bin/slptool - from package: slptool

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

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