xglyph: 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/xglyph - from package: t1lib-apps

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

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