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課題 4-1
テキストファイル ex4-1.txt の中で登場する software という文字列を sed コマンドを使って *** SOFTWARE *** という文字列に置き換えて出力しなさい．
課題 4-2
課題 4-1 の答えを拡張し， 置き換え対象の文字列と置き換え後の文字列を指定できるシェルスクリプト replace.sh を作りなさい．※シェルスクリプトの中に sed コマンドを書くときは，'s/../../g' の 先頭と末尾にある ' は必要ない: ' を付けているとうまく動かないので注意．
※実行例．
課題 4-1 で使用したファイル ex4-1.txt の内容に対して
software を ########### に置き換える：
$ bash replace.sh ex4-1.txt 'software' '###########'
Given the central role that ########### development plays in the delivery
and application of information technology, managers are increasingly
focusing on process improvement in the ########### development area. This
demand has spurred the provision of a number of new and/or improved
approaches to ########### development, with perhaps the most prominent
being object-orientation (OO). In addition, the focus on process
improvement has increased the demand for ########### measures, or metrics
with which to manage the process. The need for such metrics is
particularly acute when an organization is adopting a new technology
for which established practices have yet to be developed. This
research addresses these needs through the development and
implementation of a new suite of metrics for OO design. Metrics
developed in previous research, while contributing to the field's
understanding of ########### development processes, have generally been
subject to serious criticisms, including the lack of a theoretical
base. Following Wand and Weber (1989), the theoretical base chosen for
the metrics was the ontology of Bunge (1977). Six design metrics are
developed, and then analytically evaluated against Weyuker's (1988)
proposed set of measurement principles. An automated data collection
tool was then developed and implemented to collect an empirical sample
of these metrics at two field sites in order to demonstrate their
feasibility and suggest ways in which managers may use these metrics
for process improvement.