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This note will show you how to convert a string to lowercase (small letters) on the Linux command line. To convert a string to lower case regardless of its current case, use one of the following commands. tr echo "Hi all" | tr '[:…
Read article →This note will show you how to convert a string to upper case (capital letters, uppercase) on the Linux command line. To convert a string to capital letters regardless of its current case, use one of the following commands. tr ech…
Read article →Whenever operating system packages are updated (as well as when new packages are installed), in addition to checking dependencies, package managers also check that there is no file conflict. That is, a package containing files tha…
Read article →The “bundle install” command does not allow you to run it as root. For example, the following sequence of commands will fail: gem update --system xcode-select --install gem install nokogiri bundle install The last command will sho…
Read article →Why install Ruby Ruby is a scripting language, that is, pre-compilation is not required to run programs. In this sense, Ruby is an analogue of PHP, Python, PERL and others. Ruby is a fairly popular language and many interesting pr…
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