uscan-components: 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/bin/uscan-components - from package: pkg-components

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

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