/usr/share/doc/ruby-systemu/examples/d.rb is in ruby-systemu 2.6.4-1.
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1 2 3 4 5 6 7 8 9 10 | #
# the cwd can be supplied
#
require 'systemu'
require 'tmpdir'
pwd = %q( ruby -e" STDERR.puts Dir.pwd " )
status = systemu pwd, 2=>(stderr=''), :cwd=>Dir.tmpdir
puts stderr
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