Set password or security method as desired.
Open a file in Acrobat and choose “Tools” > “Protect.” Select whether you want to restrict editing with a password or encrypt the file with a certificate or password. Have you lost the H.264 DVR's password and don't know how recover it? Some generic DVRs usually don't even come with instructions on how to reset their passwords, but don't worry, in this article you will learn how to reset some of the famous H.264 network DVRs.Additionally, if the system is encrypted, you will also need to know the LUKS passphrase. Note that to reset the root password, you need to have physical access to the machine in order to reboot and to access GRUB settings. This guide will show you how to reset a lost or forgotten root password.
