How can I recursively bzip2 all files that do not end with the
.bz2 extension in Linux?
Off the top of my head (sorry, don't have a shell handy to test quoting etc.):
for _t in `find . -print |grep -v -E "\.bz$"`; do bzip2 -9 $_t && echo OK $_t || echo FAIL $_t; done
This uses find to find all files, grep to strip out the ones with a .bz2 extension and then feed them one at a time into bzip2. I expect some of the quoting is wrong, though - I'd test the bit in the backquotes separately first.
Good luck! You might want to use xz instead, though - it usually compresses better - or even tar everything up and bzip2 or xz instead.
Here is a one liner. If necessary, install
ifne first. On Ubuntu:
sudo apt-get install moreutils
find YOUR_DIR -type f -not -name \*.bz2 -print0 | ifne xargs -0 bzip2
This does the same as other answers, but you won't get warning messages about bzip2ing directories, and if there is nothing to
bzip2 anymore, you won't get warning messages about bzip2ing compressed data to a terminal. It also uses
YOUR_DIR can have wild cards or multiple dirs, e.g. YOUR*DIR or the like.