lxterminal: 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/lxterminal - from package: lxterminal

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

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