How to run commands on files found

If I want to delete any log files in a directory and log files in this directory have common substring "log" in their name, we could do it all in one command.

nuclearegg69@zenbook-f13:~$ ls
1   2  a             b  colt-ex  empty  hello2   inNano3.txt    inNanoSymlink  testRen2      unsortedNums.txt  world2
1a  3  alphabet.txt  c  echo     hello  inNano3  inNanoRenamed  testRen        unsorted.txt  world
nuclearegg69@zenbook-f13:~$ find ~ -name "*hello*" -exec rm -r '{}' ';'
nuclearegg69@zenbook-f13:~$ ls
1   2  a             b  colt-ex  empty    inNano3.txt    inNanoSymlink  testRen2      unsortedNums.txt  world2
1a  3  alphabet.txt  c  echo     inNano3  inNanoRenamed  testRen        unsorted.txt  world
nuclearegg69@zenbook-f13:~$

OR

nuclearegg69@zenbook-f13:~$ ls
1   2  a             b  colt-ex  empty  hello2   inNano3.txt    inNanoSymlink  testRen2      unsortedNums.txt  world2
1a  3  alphabet.txt  c  echo     hello  inNano3  inNanoRenamed  testRen        unsorted.txt  world
nuclearegg69@zenbook-f13:~$ find . -name "*hello*" | xargs rm -r
nuclearegg69@zenbook-f13:~$ ls
1   2  a             b  colt-ex  empty    inNano3.txt    inNanoSymlink  testRen2      unsortedNums.txt  world2
1a  3  alphabet.txt  c  echo     inNano3  inNanoRenamed  testRen        unsorted.txt  world

Let's break those commands apart starting with the first one:

• find: used to find objects (files, dirs, links)
• ~ : in home directory
• -name: with a name of
• "*hello*": containing substring hello (i.e. with zero or more characters before 'hello' and zero or more after)
• -exec: execute following operation/command on every record found
• rm -r: delete recursively (so dir and all dirs and files nested within it)
• '{}' placeholder for current file/dir (so rm -r '{}' = delete current file/dir and it will run for every file/dir found)
• ';' : indicate the end of the rm command and is passed as a parameter to dir to not confuse the bash that it ends the whole find command

'{}' since this is a placeholder for current file name, it provides a convenient way for renaming files

find . -type f -exec mv '{}' '{}_new' ';'

This adds a substring _new at the end of each file name

• xargs: the pipe passes the list of files found to xargs standard input and xargs runs the command following it on each file, passing the file as an argument