libieee1284_test: 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/libieee1284_test - from package: libieee1284

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

Error in other languages:
libieee1284_test: bevel nie gevind nie
libieee1284_test: comandă negăsită
libieee1284_test: comando não encontrado
libieee1284_test: commande introuvable
libieee1284_test: command not found
libieee1284_test: käsku ei ole
libieee1284_test: không tìm thấy lệnh
libieee1284_test: komanda nerasta
libieee1284_test: Kommando nicht gefunden.
libieee1284_test: kommandot finns inte
libieee1284_test: komut yok
libieee1284_test: nie znaleziono polecenia
libieee1284_test: níor aimsíodh an t-ordú
libieee1284_test: no se encontró la orden
libieee1284_test: no s'ha trobat l'ordre
libieee1284_test: opdracht niet gevonden
libieee1284_test: parancs nem található
libieee1284_test: perintah tidak ditemukan
libieee1284_test: príkaz nenájdený
libieee1284_test: příkaz nenalezen
libieee1284_test: команда не найдена
libieee1284_test: командата не е открита
libieee1284_test: 命令找不到
libieee1284_test: コマンドが見つかりません