luit: 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
/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/luit - from package: xorg-x11-apps

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

On Debian possible default full paths are:

/usr/bin/luit - from package: x11-utils

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