To delete all files except one!

- using find
find . \! -name 'file' -delete

- using zsh:
setopt extendedglob
echo ^foo
rm ^foo

- using bash:
shopt -s extglob
rm -v !("filename")

rm -v !("filename1"|"filename2")
to delete all except filename1 and filename2

Bash Specific Use Globignore variable
GLOBIGNORE=*.iso:*.txt
rm *
unset GLOBIGNORE
it will remove all except iso and text file

#notes #challenges