uil: 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/uil - from package: lesstif-clients
/usr/bin/uil - from package: openmotif-devel

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

On Debian possible default full paths are:

/usr/bin/uil - from package: uil

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

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