内容一：gzip 命令简介
1.1 gzip 命令的格式
# gzip <option> <file>1.2 gunzip 命令的常用选项
1) -c or –stdout, write on standard output, keep original files unchanged
2) -d or –decompress, decompress
3) -f or –force, force overwrite of output file and compress links
4) -h or –help, give this help
5) -k or –keep, keep (don’t delete) input files
6) -l or –list, list compressed file contents
7) -n or –no-name, do not save or restore the original name and timestamp
8) -N or –name, save or restore the original name and timestamp
9) -q or –quiet, suppress all warnings
10) -r or –recursive or –rsyncable, operate recursively on directories
11) -t or –test, test compressed file integrity
12) -1 or –fast, compress faster
13) -9 or –best, compress better
内容二：gzip 命令的使用案例
2.1 案例一：压缩文件
# gzip test.txt（补充：这里以压缩文件 test.txt 为例）
2.2 案例二：解压文件
# gzip -d test.txt.xz（补充：这里以解压文件 test.txt.zx 为例）