xvile-pager: 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/xvile-pager - from package: xvile

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

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