A collection of short one line bash snippets.

bash_snippets.sh

#!/bin/bash

# find hidden files recursively from the current folder which file names are not starting with a dot
find . -flags +hidden -name \[\!.\]\*

# unhide all files recursively from the current folder which file names are not starting with a dot
find . -flags +hidden -name \[\!.\]\* -exec chflags nohidden {} \;

# simple search and replace in all file names of current folder
# echo is there for preview, remove it to actually execute the command
for f in *.*; do echo mv "$f" "${f/SEARCHSTRING/REPLACESTRING}"; done
# substring replace, e.g.
# ${param:3} # third character to end
# ${param:-3} # third last character to end
# ${param:3:2} # third character to fourth character (length of 2)
# ${param:3:-2} # third character to second last character, excluding second last character
for f in *.*; do echo mv "$f" "${f:offset:length}"; done
# see also http://www.gnu.org/software/bash/manual/bashref.html#Shell-Parameter-Expansion