nevans

ip_prefix=xxx.yyy.zzz
count=4
for (( i=96; i <= 127; i=i+1 )); do ip=$ip_prefix.$i; echo Trying $ip; mtr -nr -c $count $ip; done
# or
for (( i=96; i <= 127; i=i+1 )); do ip=$ip_prefix.$i; echo Trying $ip; arping -c $count -w $count $ip; done
# ...

nevans

def unpack_ip(packed_ip)
  octets = []
  4.times do
    octet = packed_ip & 0xFF
    octets.unshift(octet.to_s)
    packed_ip = packed_ip >> 8
  end
  ip = octets.join('.')
end

nevans

# put this into your config/eydeploy.rb
def bundle
  if File.exist?("#{c.release_path}/Gemfile")
    info "~> Gemfile detected, bundling gems"
    lockfile = File.join(c.release_path, "Gemfile.lock")

    bundler_installer = if File.exist?(lockfile)
                          get_bundler_installer(lockfile)
                        else
                          warn_about_missing_lockfile

nevans

# stick this code at the bottom of your config/environment.rb
# (unless, of course, you already have something similar)

initializer_glob = File.join(RAILS_ROOT, "config/initializers/*.rb")
initializers = Dir[initializer_glob].map {|f| File.expand_path(f) }.sort
initializers.each {|f| require f }

nevans

def collapse_array_of_ranges(array)
  # simplify, by sorting on range.begin
  array.sort_by(&:begin).inject([]) do |a, r|
    # compared with last range...
    last_range = a[-1]
    if last_range && last_range.include?(r.begin)
      # ignore range if it is completely inside of last range
      unless(last_range.include?(r.end))
        # this range overlaps last range,
        # thus, pull off last range and merge them

nevans

Is there a way to get mustache to do the following?

nevans

ip addr show |
  grep 'inet' |
  awk '{ print $2 }' |
  awk -F / '{ print $1 }' |
  sort

nevans

echo -e 'count\t size\t name'
for dir in *; do
  echo -e `find "$dir" -type f | wc -l` '\t' \
           `du -sh "$dir" | awk '{ print $1 }'` '\t' \
           "$dir"
done | sort -n

nevans

sudo last -i -f /var/log/btmp |
  awk '{ per[$3] += 1 } END { for (i in per) print per[i], i }' |
  sort -n |
  tail -15

nevans

mount |
  awk '/ext3/{ print $3 }' |
  grep -v '/tmp' |
  xargs df |
  awk 'NR==1{next}
       $4~/%/{ print "+ "$2" ("$5")"; SUM += $2 }
       $5~/%/{ print "+ "$3" ("$6")"; SUM += $3 }
       END { print "=> " SUM/1024/1024 }'