Usage examples of find command to search and remove files

Check current directory for *.log files larger than 1Mb:

$ find . -maxdepth 1 -name '*.log' -type f -size +1M
./parallels.log

Check directory tree up to 5 enclosed folders for *.log files larger than 1Mb, and show their size:

$ find . -maxdepth 5 -name '*.log' -type f -size +1M -exec du -h {} \;
1.4M ./parallels.log

 Check directory tree up to 5 enclosed folders for *.log files larger than 1Mb, and remove them forcibly:

find . -maxdepth 5 -name '*.log' -type f -size +1M -exec rm -f {} \;

Or same using the for loop:

$ for i in $(sudo find ./ -type f -name '*.log'); do
       rm -f $i
  done

Create a dummy file of specified size

If you need to create a big file of specified size for testing purposes (for testing Glance or Cinder for example), you can follow next few steps:

• Install fallocate tool from util-linux
  $ sudo apt-get install util-linux
• Create your dummy file of specified size. Let's do a file of 1Gb size
  $ fallocate -l 1G dummy.iso

Then you can use it, for example upload to Glance:

$ glance image-create --name dummy.iso --disk-format iso --container-format bare --file dummy.iso