ttf2pt1_showg: 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/ttf2pt1_showg - from package: ttf2pt1

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

Error in other languages:
ttf2pt1_showg: bevel nie gevind nie
ttf2pt1_showg: comandă negăsită
ttf2pt1_showg: comando não encontrado
ttf2pt1_showg: commande introuvable
ttf2pt1_showg: command not found
ttf2pt1_showg: käsku ei ole
ttf2pt1_showg: không tìm thấy lệnh
ttf2pt1_showg: komanda nerasta
ttf2pt1_showg: Kommando nicht gefunden.
ttf2pt1_showg: kommandot finns inte
ttf2pt1_showg: komut yok
ttf2pt1_showg: nie znaleziono polecenia
ttf2pt1_showg: níor aimsíodh an t-ordú
ttf2pt1_showg: no se encontró la orden
ttf2pt1_showg: no s'ha trobat l'ordre
ttf2pt1_showg: opdracht niet gevonden
ttf2pt1_showg: parancs nem található
ttf2pt1_showg: perintah tidak ditemukan
ttf2pt1_showg: príkaz nenájdený
ttf2pt1_showg: příkaz nenalezen
ttf2pt1_showg: команда не найдена
ttf2pt1_showg: командата не е открита
ttf2pt1_showg: 命令找不到
ttf2pt1_showg: コマンドが見つかりません