Bash script for bulk renaming files

In Linux, logs should be compressed with bzip2 at highest compression.

Usually they are compressed with gzip and filenames end in .gz . To achieve bzip2 compression, I put this in the logrotate configuration file:

compresscmd /bin/bzip2
compressoptions "-9"

That operation was a success but the patient almost died. The files did not get the correct file suffix that should have been .bz2 . So I wrote a script to do that automatically once and for all.

for SKRA in *.gz ; do
[ "$(file --mime-type --brief $SKRA)" == 'application/x-bzip2' ] && ( mv $SKRA ${SKRA/.gz/.bz2} );
done



In order to ensure that the files would get the right filename, I put this into the logrotate configuration:

compresscmd /bin/bzip2
uncompresscmd /bin/bunzip2
compressoptions "-9"
compressext .bz2