lcdvc: 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/lcdvc - from package: lcdproc

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

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