Quick script to get the total memory usage for a specific user on a server.

usermem

#!/usr/bin/env ruby -w

unless ARGV[0]
	puts "\nSpecify a username. \n\nUsage:"
	puts "usermem UserName\n\n"
	exit!
end

total = 0

mem = `ps -u #{ARGV[0]} -o rss`

mem = mem.split("\n")

mem.delete_at(0)

mem.each do |val|
	total = total + val.to_i
end

puts "Total memory usage for #{ARGV[0]} in MB: #{total / 1024}"