lakclear: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/lakclear - from package: lakai

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