Shell to remove files of two days ago or later

Question

Hello experts and gurus,
can someone tell me where can I find a documentation or web page that shows an easy and simple way to remove old files by date (for example, remove files older than 2 days: for example, if today is monday, I need to remove files from saturday or later). I researched but didn't find it. I am not shell script expert, but I'm studying linux.
Many thanks,

Answer 1

There was actually no need to limit the search results to regular files and then remove directories and their contents recursively. The find command has a few action commands built-in, which does not need to pass results to an external program for processing. Please see the following:
Terminal - Example
# su - dude
$ touch testFile1 testfile2 TESTfile3
$ find ./ -type f -iname 'testfile*' -ls -delete
261742    0 -rw-rw-r--   1 dude     dude            0 Nov 28 08:41 ./testfile2
261747    0 -rw-rw-r--   1 dude     dude            0 Nov 28 08:41 ./TESTfile3
261689    0 -rw-rw-r--   1 dude     dude            0 Nov 28 08:41 ./testFile1
$ find ./ -type f -name "testfile*" -ls -delete
$
Also note the effect of single and double quoting the find name argument and command line globbing, which many Linux/Unix system administrators with a MS Windows background may not be aware off. The shell resolves wildcards and variables rather than passing the argument to the find command unless it is single quoted:
Terminal - Example
$ touch 'test$File1' 'test$file2' 'TEST$file3'
$ mkdir test
$ find ./ -type f -iname 'test$file*' -ls
261689    0 -rw-rw-r--   1 dude     dude            0 Nov 28 08:53 ./test$File1
261747    0 -rw-rw-r--   1 dude     dude            0 Nov 28 08:53 ./TEST$file3
261742    0 -rw-rw-r--   1 dude     dude            0 Nov 28 08:53 ./test$file2
$ find ./ -type f -iname test$file* -ls
find: paths must precede expression: test$File1
$ strace find ./ -type f -iname test$file* -ls
execve("/bin/find", ["find", "./", "-type", "f", "-iname", "test", "test$File1", "test$file2", "-ls"]
$ strace find ./ -type f -iname 'test$file*' -ls
execve("/bin/find", ["find", "./", "-type", "f", "-iname", "test$file*", "-ls"]
$ strace find ./ -type f -iname "test$file*" -ls
execve("/bin/find", ["find", "./", "-type", "f", "-iname", "test*", "-ls"]