047 校验zip归档文件

有时候你只是想校验一下规定文件的有效性而并不像真正的解压缩它，你可以在zip命令后加一个-t选项：

# unzip -t var-log.zip 
 
     Archive:  var-log.zip 
    testing: var/log/acpid            OK 
    testing: var/log/anaconda.log     OK 
    testing: var/log/anaconda.syslog   OK 
 
skip... 
 
    testing: var/log/wtmp             OK 
    testing: var/log/wtmp.1           OK 
    testing: var/log/Xorg.0.log       OK 
 
No errors detected in compressed data of var-log.zip.