.H 1 pax .B pax is a POSIX 1003.2 conformant replacement for .B tar and .B cpio that handles most UNIX archive and tape formats. .B pax uses the .I vdelta algorithm to construct efficient delta archives that contain bytewise changes from a given base archive. .B gzip and .B compress archives are also handled on input and output. .P To create a .I vdelta compressed base archive: .EX tw | pax -w -f base -z - .EE To create a delta archive on the base above (record file changes only): .EX tw | pax -w -f delta -z base .EE To read the delta archive: .EX pax -r -f delta -z base .EE To create a delta archive from linux-1.2.0 to linux-1.2.5: .EX pax -rf linux-1.2.5.tar.gz -wf 0-5.pax.gz -x gzip -z linux-1.2.0.tar.gz .EE To create the linux-1.2.5 archive: .EX pax -rf 0-5.pax.gz -z linux-1.2.0.tar.gz -wf linux-1.2.5.tar.gz -x tar -x gzip .EE The .B bax script, shipped with .BR pax , combines .B tw and .B pax for handy backup control.
