ftbench: 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/ftbench - from package: freetype-demos

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

On Debian possible default full paths are:

/usr/bin/ftbench - from package: freetype2-demos

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

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