CodeNote

curl -s https://raw.github.com/xdissent/ievms/master/ievms.sh | bash

curl -s https://raw.githubusercontent.com/xdissent/ievms/master/ievms.sh | env IEVMS_VERSIONS="11 EDGE" bash

$ brew install iftop

$ ln -s /usr/local/Cellar/iftop/1.0pre4/sbin/iftop /usr/local/bin/iftop

$ which iftop
/usr/local/bin/iftop

$ iftop -h
iftop: display bandwidth usage on an interface by host
 
Synopsis: iftop -h | [-npblNBP] [-i interface] [-f filter code]
                               [-F net/mask] [-G net6/mask6]
 
   -h                  display this message
   -n                  don't do hostname lookups
   -N                  don't convert port numbers to services
   -p                  run in promiscuous mode (show traffic between other
                       hosts on the same network segment)
   -b                  don't display a bar graph of traffic
   -B                  Display bandwidth in bytes
   -i interface        listen on named interface
   -f filter code      use filter code to select packets to count
                       (default: none, but only IP packets are counted)
   -F net/mask         show traffic flows in/out of IPv4 network
   -G net6/mask6       show traffic flows in/out of IPv6 network
   -l                  display and count link-local IPv6 traffic (default: off)
   -P                  show ports as well as hosts
   -m limit            sets the upper limit for the bandwidth scale
   -c config file      specifies an alternative configuration file
   -t                  use text interface without ncurses
 
   Sorting orders:
   -o 2s                Sort by first column (2s traffic average)
   -o 10s               Sort by second column (10s traffic average) [default]
   -o 40s               Sort by third column (40s traffic average)
   -o source            Sort by source address
   -o destination       Sort by destination address
 
   The following options are only available in combination with -t
   -s num              print one single text output afer num seconds, then quit
   -L num              number of lines to print
 
iftop, version 1.0pre4
copyright (c) 2002 Paul Warren <pdw@ex-parrot.com> and contributors

$ brew update
Error: /usr/local must be writable!

$ brew doctor
 
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry and just ignore them. Thanks!
 
Warning: /usr/local is not writable.
 
You should probably change the ownership and permissions of /usr/local
back to your user account.
  sudo chown -R $(whoami) /usr/local
 
Warning: /usr/local is not writable.
Even if this directory was writable when you installed Homebrew, other
software may change permissions on this directory. For example, upgrading
to OS X El Capitan has been known to do this. Some versions of the
"InstantOn" component of Airfoil or running Cocktail cleanup/optimizations
are known to do this as well.
 
You should probably change the ownership and permissions of /usr/local
back to your user account.
  sudo chown -R $(whoami) /usr/local
 
Warning: Some installed formula are missing dependencies.
You should `brew install` the missing dependencies:
  brew install oniguruma
 
Run `brew missing` for more details.
 
Warning: Your Homebrew is outdated.
You haven't updated for at least 24 hours. This is a long time in brewland!
To update Homebrew, run `brew update`.

sudo chown -R $(whoami) /usr/local

brew update
 
/usr/local/Library/Homebrew/cmd/update.sh: line 13: /usr/local/Library/ENV/scm/git: No such file or directory
(略)
/usr/local/Library/Homebrew/cmd/update.sh: line 13: /usr/local/Library/ENV/scm/git: No such file or directory
Error: update-report should not be called directly!

brew prune