if else 简化 && ||

[root@wz ~]#cat gzip.sh 
#!/bin/bash
gzip -t web.tar.gz 
if [[ 0 == $? ]]; then
    echo "good zip"
else
    echo "bad zip"
fi


gzip  -t web.tar.gz && echo "good zip" || echo "bad zip"
[root@TENCENT64site ~]#bash gzip.sh 
good zip
good zip