Kim Scarborough: things I do: computer nerd stuff: tips & cheatsheets: misc. Unix

Remove cores:
find . -name core -exec rm {} \;
Remove dangling symlinks (BASH):
find . -type l | while read XX ; do if [ ! -e "${XX}" ] ; then rm -v ${XX} ; fi ; done
Find fastest mirror:
netselect -v -s20 -t20 `cat FILE`
(where FILE is a space-separated list of URLs)
Set up X11 forwarding through sudo:
sudo xauth add $(xauth list | grep `hostname`)