我试图写一个短篇的文字,以显示铁路,无论由于不同的冲突,我都需要修改我的环境卷宗,以评论铁路版。 因此,我的问题是,我是如何去第8行环境的?
有许多办法,但首先想到的是:
sed s/^(RAILS_GEM_VERSION.*)$/# 1/ -i .backup config/environment.rb
甚至在废墟中:
ruby -pi -e print "# " if $_ =~ /^RAILS_GEM_VERSION/ config/environment.rb
第8条
awk NR==8{$0="#"$0}1 config/environment.rb >temp
mv temp config/environment.rb
缩略语
awk /RAILS_GEM_VERSION/{gsub(/^RAILS_GEM_VERSION/,"#RAILS_GEM_VERSION") }1 config/environment.rb >temp
mv temp config/environment.rb
视你想增加“新许可”的字眼而定,你想在案卷尾添加,然后是使用和开发;
echo config.gem="newrelic_rpm" >> config/environment.rb
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