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mark/jump navigation shell functions
export MARKPATH=$HOME/.marks
function jump {
cd -P "$MARKPATH/$1" 2>/dev/null || echo "No such mark: $1"
function mark {
mkdir -p "$MARKPATH"; ln -s "$(pwd)" "$MARKPATH/$1"
function unmark {
rm -i "$MARKPATH/$1"
function marks {
ls -l "$MARKPATH" | sed 's/ / /g' | cut -d' ' -f9- | sed 's/ -/\t-/g' && echo
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