sord_validate: 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/sord_validate - from package: sordi

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

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