i15e

  docker image ls -a | stdbuf -oL sed -r 's/\s{2,}/\t/g' | { head -n1; tail -n+2 | sort -hrk5 -t$'\t'; } | column -ts$'\t'

    $ (sleep 10; false)
    ^Z
    [1]+  Stopped                 ( sleep 10; false )
    $ wait %% && echo ok || echo nok
    [1]+  Exit 1                  ( sleep 10; false )
    nok

  firefox -P

  $ printf 'one\n\nthree\n' | nl
     1  one

     2  three

  $ touch 'a b.md' 'c d.md'
  $ strace -fe execve find . -iname '*.md' -exec unbuffer ls {} \;

  execve("/bin/ls", ["ls", "./c d.md"] ...
  execve("/bin/ls", ["ls", "./a b.md"] ...

  find . -iname '*.md' -exec unbuffer ls -1 {} +