Unix Tips from the interwebs

unix_tip.sh

# To show everytime your shell opens add this function to the bottom of your bash_profile,bashrc,zshrc

function unix_tip() {
    while [ "$count" -ne 1 ]; do
        type pandoc >/dev/null 2>&1 || { echo >&2 "Pandoc is required, but not installed. If you have homebrew try: brew install pandoc"; break; }
        type xmlstarlet >/dev/null 2>&1 || { echo >&2 "xmlstarlet is required, but not installed. If you have homebrew try: brew install xmlstarlet"; break; }
        ping -c1 8.8.8.8 >> /dev/null
        if [ $? -eq 0 ]; then
            curl -s https://raw.githubusercontent.com/jlevy/the-art-of-command-line/master/README.md \
                | pandoc -f markdown -t html \
                | xmlstarlet fo --html --dropdtd \
                | xmlstarlet sel -t -v "(html/body/ul/li[count(p)>0])[$RANDOM mod last()+1]" \
                | xmlstarlet unesc \
                | fmt -80
            count=1
        else
            echo "Network Connection Required to Display Unix Tips\nAlternatively you can clone https://github.com/jlevy/the-art-of-command-line and replace the curl command with cat /path/to/the-art-of-command-line"
            count=1
        fi
    done
}; unix_tip