Unix commads : Find command example

find . -not -path '*/\.*' -type d \( -iname "$version_id" \) ! -newermt `date +%y%m%d -d "30 days ago"` | tee -a "$log_file"

find . -not -path '*/\.*' -type d \( -iname "$version_id" \) - Find the directory not present in hidden directories

! -newermt `date +%y%m%d -d "30 days ago"`  - Older than 30 days

find . ! -newermt 2016-02-22 ! -type d -delete - Delete the older before the specified date

find . -type l -ls - Find all links

find . -not -path '*/\.*' -type d \( -iname "$version_id" \) ! -newermt `date +%y%m%d -d "63 days ago"` | xargs  rm -rf -- To delete