usb-devices: 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/usb-devices - from package: usbutils

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

On Debian possible default full paths are:

/usr/bin/usb-devices - from package: usbutils

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

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