Search and replace on command line to rename files

remove all spaces in filesnames

# change *.* to *.jpg to only target JPGs, for example

# and to customize the search...
# sed -e 's,  what you're searching for goes in this space  , what you want to replace it with goes here ,g'

#the default example here with turn spaces into nothing ( i.e. remove all spaces from file names )

for i in *.*; do mv "$i" "`echo $i | sed -e 's, ,,g'`"; done