glines: 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/glines - from package: gnome-games-extra

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

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