Compression Tools

Options to make security copies of files:

• Total: All files are copied
• Differential: Only modified files since a particular date are copied. To use this option, use -N followed by the date.
• Incremental: Only files changed since the last backup are copied. To use this option, use -g followed by the location of the registry file.

There are several commands to compress and decompress files. The most known are:

• gzip
• bzip
• xz

To save the original file or files when compressing, use the option -k.
To decompress, use the option -d.

Examples

gzip file           # Compress a file
bzip -k file        # Compress a file and save the original 
gunzip file.xz      # Decompress a file 
bzip -d file.bz     # Decompress a file