I love this! Thank you soooooo much!

git ls-files -o --exclude-standard

Will show all files which will be listed with git add .

sed -i myfilename.sql -e 's/utf8mb4_0900_ai_ci/utf8mb4_unicode_ci/g'

Collation is everything :)

find -maxdepth 1 -type d -not -name "*hide*"

= Show all directories directly located in the current directory which do not have the word 'hide' in their name.

Useful to check where a script drops exactly and what's the output of variables, find, etc.:

sh -x ./scriptname

Change files or directories by appending a string (_2_DELETE) to their name:

mv filename{,_2_DELETE}

Useful and fast:

find -type f -name 'filename' -exec grep -H 'text to find' {} +

Same result and maybe even better performance:

For some years I had problems when updating or installing a site with composer from my vagrant box.

Put all pdf's you want to combine in a directory. Name them in the order, you want to combine them.

qpdf --empty --pages *.pdf -- NameOfMergedFile.pdf

To resize all *.jpg images in a directory into a new directory, keeping aspect ratio do:

mkdir web && mogrify -resize 2200x -quality 95 -path web *.jpg