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find [目录] [文件]
例：
1)查找/home目录下所有的目录
find /home -type d
type:
b block (buffered) special
c character (unbuffered) special
d directory
p named pipe (FIFO)
f regular file
l symbolic link; this is never true if the -L option or the
-follow option is in effect, unless the symbolic link is
broken. If you want to search for symbolic links when -L
is in effect, use -xtype.
2) 查找/home目录下所有大小大于100M的文件
find /home -size +100M
数字前的加号，表示大于给定值; 减号表示小于给定值; 不加为等于。
`b' for 512-byte blocks (this is the default if no suffix is used)
`c' for bytes
`w' for two-byte words
`k' for Kilobytes (units of 1024 bytes)
`M' for Megabytes (units of 1048576 bytes)
`G' for Gigabytes (units of 1073741824 bytes)
3) 查找最近5天内修改的文件 find /home -mtime -5
查找最近5天前访问的文件 find /home -atime +5
查找最近5天内改变过状态的文件 find /home -ctime -5
查找当前目录下比a.txt文件新的文件 find . -newer a.txt
查找当前目录下比a.txt文件新但比b.txt旧的文件find . -newer a.txt ! -newer b.txt
4）查找文件并执行命令
find . -name "*.core" -exec rm -rf {} \;
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更详细的信息：man find
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