plotorf: command not found

Have You tried accessing the binary with the full path?

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 Debian possible default full paths are:

/usr/bin/plotorf - from package: emboss

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