smiucv: 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/smiucv - from package: smaclient

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

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