This command changes the password which is also known as the set permissions password or the master password. Have a look at some examples.
pdfcpu changeopw [-upw userpw] inFile opwOld opwNew
|v(erbose)||turn on logging|
|c(onf)||config dir||$path, disable|
|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 ...