The tr Command

tr

The tr command translates, deletes, or squeezes characters. The following example takes a logfile that has been converted into a CSV file and deletes all dashes. (Many log files put a dash in a column if there is no data available.)

cat access_log.csv | tr -d - > access_log_no_dashes.csv

(You probably wouldn't want to do this if the site has URLs with dashes in them.)