Sign up for a GitHub account Sign in All Gists garybernhardt / gist:e4910b80e8ccda9f3538 Created October 29, 2014 Code Revisions 1 Stars 1 /.sunken-menu-group /.sunken-menu-contents Embed HTTPS SSH You can clone with HTTPS or SSH . Download Gist /.only-with-full-nav View gist:e4910b80e8ccda9f3538 gistfile1.sh Raw File suppressed. Click to show. 1 find $( manpath | tr ':' '\n' ) -iname '*.1' | xargs cat | ( LC_CTYPE = C tr -C '[:alnum:]-_' '\n' ) | egrep '^--[\-_[:alnum:]]+$' | sort | uniq -c | sort -n igalic commented October 29, 2014 egrep: Invalid range end xargs: cat: terminated by signal 13 Owner garybernhardt commented October 29, 2014 your grep has a different syntax; debug it and I'll update ...