1. Compressed file format
.gz .zip (common to linux windows) .rar (linux requires rar support)
2. .gz
gzip filename -- only compress files, don't keep source files
gunzip file -- decompress gz format archive
3. tar package
-c pack -v verbose -f specify filename
tar -cfv filename directory to be packaged
4. Pack and compress
tar -zcfv filename directory to be packaged and compressed
5. Unpack and unzip
tar -zxvf to compress the file
6.zip
zip compressed file name source file (retain original file) -r compressible directory
unzip compressed file
7.bzip2 zip upgrade version, high compression ratio
-k keep the original file