nih-dbus-tool: 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/nih-dbus-tool - from package: libnih-devel

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

On Debian possible default full paths are:

/usr/bin/nih-dbus-tool - from package: nih-dbus-tool

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

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