saned: 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/sbin/saned - from package: sane-backends

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

On Debian possible default full paths are:

/usr/sbin/saned - from package: sane-utils

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

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