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Recursively chmod for directories:

find . -type d -exec chmod 775 {} \;

1	find . -type d -exec chmod 775 {} \;

Recursively chmod for files:

find . -type f -exec chmod 664 {} \;

1	find . -type f -exec chmod 664 {} \;

Find specific filename:

find . -name autorun.inf -print

1	find . -name autorun.inf -print

Find a specified file with maximum 2 directories depth:

find . -maxdepth 2 -name autorun.inf -type f -print

1	find . -maxdepth 2 -name autorun.inf -type f -print

Find a specified file in locate db:

locate autorun.inf

1	locate autorun.inf

Find all files bigger than 30MB:

find -type f -size +30M -exec ls -al ‘{}’ \;

1	find -type f -size +30M -exec ls -al ‘{}’ \;

Find all files with extensions doc xls and pdf:

find -type f -iname “*.doc” -or -iname “*.xls” -or -iname “*.pdf” -print
find -type f -iregex “.*.(doc|xls|pdf)” -print

1 2	find -type f -iname “.doc” -or -iname “.xls” -or -iname “.pdf” -print find -type f -iregex “..(doc\|xls\|pdf)” -print

Find all files except with extensions doc xls and pdf:

find -type f ! -iregex “.*.(doc|xls|pdf)” -print

1	find -type f ! -iregex “.*.(doc\|xls\|pdf)” -print

Find all files modified 30 days ago:

find -type f -mtime 30 -print

1	find -type f -mtime 30 -print

Find files like IMG_1234 1.JPG and delete them (tested on MAC)

find -E . -regex '.*/IMG_[0-9]{4}[ ]1.JPG' -print -exec rm '{}' \;

1	find -E . -regex '.*/IMG_[0-9]{4}[ ]1.JPG' -print -exec rm '{}' \;

Find files like 509b790a273c0 and delete them (tested on CENTOS)

sudo find . -regextype posix-extended -regex './50[0-9a-z]{11}' -print

1	sudo find . -regextype posix-extended -regex './50[0-9a-z]{11}' -print

Find files that differ between 2 directories

diff -rq todo_orig/ todo_backup/

1	diff -rq todo_orig/ todo_backup/

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