This command changes the password which is also known as the set permissions password or the master password. Have a look at some examples.
usage: pdfcpu changeopw [-v(erbose)|vv] [-q(uiet)] [-upw userpw] inFile opwOld opwNew
|verbose||turn on logging||no|
|upw||user password||if set|
|inFile||PDF input file||yes|
|opwOld||current owner password||yes|
|opwNew||new owner password||yes, must not be empty!|
You have to set the owner password when you
encrypt a file and you can change it anytime later with
Change the owner password:
pdfcpu encrypt -opw opw enc.pdf writing enc.pdf ... pdfcpu changeopw enc.pdf opw opwNew writing enc.pdf ...