Execute shell commands There are a number of different ways to run shell commands from Ruby. Theexeccommand Kernel#execreplaces the current process and runs the command: exec('ls ~')# Nothing after this command is executed This might be a bit impractical, so have a look at the other optio...
def safe_execute(command) if command =~ /\A[\w\s]+\z/ # 简单的正则表达式验证 output = `#{command}`.strip puts "Output: #{output}" return true else puts "Invalid command" return false end end safe_execute("ls -l") safe_execute("invalid_command") safe_execute("rm -rf /")...
Shell implements an idiomatic Ruby interface for common UNIX shell commands. It provides users the ability to execute commands with filters and pipes, like sh/csh by using native facilities of Ruby. Installation Add this line to your application's Gemfile: gem 'shell' And then execute: $ bundl...
3、 磁盘和分区 4、 ⽤户和⽤户组 5、 ⽹络和进程管理 6、 常⻅系统服务命令 7、 ⽂件和⽬录操作 8、 ⽂件查看和处理 9、 打包和解压 10、 RPM包管理命令 11、 YUM包管理命令 12、 DPKG包管理命令 ( yum install dpkg -y)
15 $< The virtual concatenation file of the files given by command line arguments, or stdin (in case no argument file supplied). $<.file returns the current filename. (Mnemonic: $< is a shell input source.) 16 $> The default output for print, printf. $stdout by default. (Mnemonic:...
storage_directory[/media/ccadmin/f9d7556b-00b3-485c-b869-e481f0cc7848/git-data] (gitlab::gitlab-rails line 46) had an error: Mixlib::ShellOut::ShellCommandFailed: ruby_block[directory resource: /media/ccadmin/f9d7556b-00b3-485c-b869-e481f0cc7848/git-data] (/opt/gitlab/embedded/...
# Execute our entry script. CMD ["/usr/local/bin/docker-entrypoint.sh"] 然而因为要对 lobsters 进行用户系统对接等修改,Gemfile / Gemfile.lock 不可避免的需要更新,开发工程师也顺手将 Ruby 版本调整到了 2.4.0 ,然而没想到只因为这么一个小小的变动,就开始了连环踩坑。
What is the output in the command prompt? Nothing? Yes, nothing. IRB displays values that Ruby returns, but when you execute Ruby file from the command line, it does not display the values Ruby returns. You have to explicitly say to Ruby that you want them displayed. It is as easy as...
in `fu_each_src_dest'/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/fileutils.rb:856:in `install'/Library/Ruby/Gems/2.6.0/gems/rubygems-update-3.4.14/lib/rubygems/commands/setup_command.rb:267:in `block (2 levels) in install_executables'/Library/Ruby/Gems/...
Hi, I'm pretty new to using Ruby. As I'm still unfamiliar with of the libraries a lot of the time I just execute a shell command within it (e.g. whatever...