Contents

  1. Delete files not modified in n days
  2. Replace text in all files in & under the current directory
  3. Find files NOT named something
  4. Fix whitespace issues

Delete files not modified in n days

Useful for clearing out caches that aren't properly cleaned out otherwise. 

# Delete files not modified in 30 days
find . -type f -mtime +30 -exec rm {} \;
# Same, but faster
find . -type f -mtime +30 -print0 | xargs -0 -n256 rm

Replace text in all files in & under the current directory

find . -type f -exec sed -i 's/old/new/g' {} \;

Find files NOT named something

# Find files matching a pattern that are NOT already compressed, then compress them
# (This particular example compresses Maildirs for use w/ dovecot's transparent decompression)
find . -type f -name '*S=*' -not -name '*.gz' -print0 | xargs -0 -P4 -n 16 zopfli -l100

Fix whitespace issues

for EXTENSION in php css html js; do
  # Remove whitespace (incl. tabs) at the end of lines
  find . -type f -name "*${EXTENSION}" -exec sed -i "s/[[:blank:]]*$//" {} \;
  # Add trailing newlines to the end of a file
  find . -type f -name "*${EXTENSION}" -exec sed -i -e '$a\' {} \;
  # Replace tabs w/ spaces
  find . -type f -name "*${EXTENSION}" -exec sed -i 's/\t/    /g' {} \;
done

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