find . -mtime 7 -print
An alternate way is to specify a range of times:
find . -mtime +6 -mtime -8 -print
mtime is the last modified time of a file. If you want to look for files that have not been used, check the access time with the -atime argument. A command to list all files that have not been read in 30 days or more is:
find . -type f -atime +30 -print
It is difficult to find directories that have not been accessed because the find command modifies the directory's access time.
There is another time associated with each file, called the ctime, the -ctime operator. The ctime will have a more recent value if the owner, group, permission, or number of links has changed, while the file itself does not. If you want to search for files with a specific number of links, use the -links operator.change time. Access it with the