tool-stat: command not found

Have You tried accessing the binary with the full path?

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/bin/tool-stat - from package: why

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