Ask HN: (2018) What are some of your favorite Unix command line aliases?

By which I mean either aliases or short bash functions. Examples: # download a video from YouTube or other major sites, recoding if needed into .mp4 format alias yt='youtube-dl --recode-video mp4' # empty the pasteboard (macOS only) [edit: fixed description] alias pbclear='echo "" | pbcopy' # remove formatting from text in pasteboard (macOS only) alias pbclean='pbpaste | pbcopy' # remove a directory even if it contains .DS_Store files (macOS specific) function rmdir() { [[ -e "$@/.DS_Store" ]] && /bin/rm "$@/.DS_Store" /bin/rmdir "$@" } # go to the "Feeling Lucky" result for a Google search lucky () { open "http://www.google.com/search?hl=en&q=`echo $* | sed "s/ /%20/g"`&btnI"; }