fontinst: 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/fontinst - from package: texlive

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

On Debian possible default full paths are:

/usr/bin/fontinst - from package: texlive-font-utils

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

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