# nvram > Manipulate firmware variables. > More information: . - [p]rint all the variables stored in the NVRAM: `nvram -p` - [p]rint all the variables stored in the NVRAM using [x]ML format: `nvram -xp` - Modify the value of a firmware variable: `sudo nvram {{name}}="{{value}}"` - [d]elete a firmware variable: `sudo nvram -d {{name}}` - [c]lear all the firmware variables: `sudo nvram -c` - Set a firmware variable from a specific [x]ML [f]ile: `sudo nvram -xf {{path/to/file.xml}}`