plotfont: 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/plotfont - from package: plotutils

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

On Debian possible default full paths are:

/usr/bin/plotfont - from package: plotutils

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

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