+# COLUMN is set to `| column -t` if it's available, empty otherwise.
+
+# Display all files (-s), use human readable sizes (-h) and display the
+# complete size (-c).
+alias du='du -shc'
+# Use human readable sizes and format it nicely, thanks to climagic
+# (http://twitter.com/climagic/status/49623386762129408).
+df() {
+ command df -hP "$@" COLUMN
+}
+
+# Highlight matched strings. Doesn't work with a pager!
+alias grep='grep --color=auto'
+
+# Pipe output through less.
+tree() {
+ command tree -C "$@" | less
+}
+
+# Better viewer for info pages .. just pipe everything into less.
+info() {
+ command info "$@" 2>/dev/null | less
+}