Bash file management

README.md

Bash file management

Listing all the files

find . -name "*"

or more advanced

find . -print | grep -E -- 'jpg|png'

Foreach

for candidate in `find . -print | grep -E -- 'jpg|png'`; do
  echo "the next file is $candidate"
done

Getting the file size of a file

size=$(wc -c < file.txt)

This is in bytes.

Getting the content-type of a file

type=$(file -b --mime-type file.txt)

Notes

image/jpeg
image/png

Bash comparisons

Numeric

if (( $size >= 614400 )); then
  echo 'hello world'
fi

String

if [ "$a" = "$b" ]; then
  echo 'hello world'
fi