libtest: 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/libtest - from package: libnxcl-bin

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

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