Rename multiple files in one command

If you want to rename multiple files, the trusty old Unix "mv" command can't help as it can rename only one file at a time.
This requires us to bring out something different from our Unix arsenal - the "rename" command!
Use the rename command in conjunction with find to rename multiple files:

find /source_folder/to/search/in/ -name 'myapp*.log.201*' -exec rename -v .log. .oldlog. {} \; >> /temp/rename.log

Here we are searching for files named 'myapp*.log.201*' and renaming them to 'myapp*.oldlog.201*'
In case you need to do this on multiple servers, use the for loops trick!