chkfont: 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/chkfont - from package: figlet

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

On Debian possible default full paths are:

/usr/bin/chkfont - from package: figlet

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

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