pcb2gcode: 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 Debian possible default full paths are:

/usr/bin/pcb2gcode - from package: pcb2gcode

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

Error in other languages:
pcb2gcode: bevel nie gevind nie
pcb2gcode: comandă negăsită
pcb2gcode: comando não encontrado
pcb2gcode: commande introuvable
pcb2gcode: command not found
pcb2gcode: käsku ei ole
pcb2gcode: không tìm thấy lệnh
pcb2gcode: komanda nerasta
pcb2gcode: Kommando nicht gefunden.
pcb2gcode: kommandot finns inte
pcb2gcode: komut yok
pcb2gcode: nie znaleziono polecenia
pcb2gcode: níor aimsíodh an t-ordú
pcb2gcode: no se encontró la orden
pcb2gcode: no s'ha trobat l'ordre
pcb2gcode: opdracht niet gevonden
pcb2gcode: parancs nem található
pcb2gcode: perintah tidak ditemukan
pcb2gcode: príkaz nenájdený
pcb2gcode: příkaz nenalezen
pcb2gcode: команда не найдена
pcb2gcode: командата не е открита
pcb2gcode: 命令找不到
pcb2gcode: コマンドが見つかりません