webkit2pdf: 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/webkit2pdf - from package: webkit2pdf

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

Error in other languages:
webkit2pdf: bevel nie gevind nie
webkit2pdf: comandă negăsită
webkit2pdf: comando não encontrado
webkit2pdf: commande introuvable
webkit2pdf: command not found
webkit2pdf: käsku ei ole
webkit2pdf: không tìm thấy lệnh
webkit2pdf: komanda nerasta
webkit2pdf: Kommando nicht gefunden.
webkit2pdf: kommandot finns inte
webkit2pdf: komut yok
webkit2pdf: nie znaleziono polecenia
webkit2pdf: níor aimsíodh an t-ordú
webkit2pdf: no se encontró la orden
webkit2pdf: no s'ha trobat l'ordre
webkit2pdf: opdracht niet gevonden
webkit2pdf: parancs nem található
webkit2pdf: perintah tidak ditemukan
webkit2pdf: príkaz nenájdený
webkit2pdf: příkaz nenalezen
webkit2pdf: команда не найдена
webkit2pdf: командата не е открита
webkit2pdf: 命令找不到
webkit2pdf: コマンドが見つかりません