fontopia: 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/fontopia - from package: fontopia

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