find 命令一个命令多参数如何使用,????,perm

[root@ob2 mytmp]# find -mtime -7 -type f \( -name "*.html" -o -name "*.tar.gz" \)
./02.html
./03.html
./tp_2017-09-143516.tar.gz
./01.html

[root@ob2 mytmp]# find -mtime -7 -type f \( -name "*.html" -o -name "*.tar.gz" \)
./02.html
./03.html
./tp_2017-09-143516.tar.gz
./01.html

括号和代码间有空格

[root@ob2 mytmp]# find -mtime -7 -type f \( -name "*.html" -o -name "*.tar.gz" \)
./02.html
./03.html
./tp_2017-09-143516.tar.gz
./01.html
[root@ob2 mytmp]# find -mtime +7 -type f    \(      -name "*.html" -o -name "*.tar.gz"      \)
./aa.html

===================================下面写法逻辑显示不对

[root@ob2 mytmp]# find -type f -name "*.html" -o -name "*.tar.gz" -mtime +7
./02.html
./aa.html
./03.html
./01.html
[root@ob2 mytmp]# find -type f -name "*.html" -o -name "*.tar.gz" -mtime -7
./02.html
./aa.html
./03.html
./tp_2017-09-143516.tar.gz
./01.html