【find -exec {} +】見つけたファイルをまとめてコマンド実行する

$ find . -name '*.log' -exec echo {} \;
./app3.log
./app1.log
./app2.log

$ find . -name '*.log' -exec echo {} +
./app3.log ./app1.log ./app2.log

$ find . -name '*.log' -exec wc -l {} +
 1 ./app3.log
 1 ./app1.log
 1 ./app2.log
 3 total

$ cat counter.sh
#!/bin/bash
echo "called with: $@" >> call.log
$ chmod +x counter.sh

$ find . -name '*.log' -exec ./counter.sh {} \;
$ cat call.log
called with: ./app3.log
called with: ./app1.log
called with: ./app2.log

$ rm call.log
$ find . -name '*.log' -exec ./counter.sh {} +
$ cat call.log
called with: ./app3.log ./app1.log ./app2.log

$ find . -name '*.log' -exec echo {} extra +
find: missing argument to `-exec'

$ find . -name '*.log' -exec echo before {} +
before ./app1.log ./app2.log

$ touch 'my file.log' 'another file.log'

$ find . -name '*.log' -exec ls -l {} +
-rw-r--r-- 1 root root 0 Jul  5 13:36 ./another file.log
-rw-r--r-- 1 root root 0 Jul  5 13:36 ./my file.log

$ find . -name '*.log' | xargs ls -l
ls: cannot access './my': No such file or directory
ls: cannot access 'file.log': No such file or directory
ls: cannot access './another': No such file or directory
ls: cannot access 'file.log': No such file or directory