Questions tagged [ruby]

Ruby is a dynamic, reflective, general-purpose object-oriented programming language that combines syntax inspired by Perl with Smalltalk-like features.

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27 views

Ruby script to create a temporary file for use with greenletters

I'm using expect to test autocompletions in zsh (actually using the Ruby greenletters gem, with uses Ruby's PTY under the covers, to call expect). After digging through the documentation and old ...
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9 views

Metasploit error on Alpine

When I trying to run ./msfconsole I got this error: Traceback (most recent call last): 9: from ./msfconsole:48:in `<main>' 8: from ./msfconsole:48:in `require' 7: from /...
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1answer
17 views

Vagrant: errors about ignoring Rubygems as their extensions are not built after install on Fedora 31

After installing the vagrant packages on Fedora 31 and subsequently running the vagrant command, there are these errors regarding ignored Rubygems: Ignoring ffi-1.10.0 because its extensions are not ...
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1answer
12 views

How do I insert my bash variable into my ruby command?

I'm using bash shell. I have defined the following variable ... localhost:tmp davea$ echo $json {"id": "abc", "name": "dave"} I would like to insert the value of this var into a ruby command, so I ...
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28 views

Help need to setup a Ruby on Rails App stack using docker

I have setup a Rails app on a docker container and a apache web server on another container. I need the apache web server to access the rails app for every request made. The issue is I have to ...
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1answer
21 views

Difference between interactive bash and commands executed via ssh

I have a setup on a server of ruby using a tool called rvm (Ruby Version Manager. It works fine. rvm adds some stuff to the path so that it can control what version of Ruby I get when I just type ruby....
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2answers
50 views

Replace all backslash escape sequence-producable characters with their escaped escape sequences

EDIT: I'm very sorry, that I initially didn't make my requirements clear. I don't actually have access to the string written in a backslash-escaped way and have amended the example to make that ...
1
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1answer
46 views

Do subprocesses keep pipes open?

I am trying to understand the behaviour of programs that launch subprocesses, when run in a pipeline. This bash program, fork.sh, prints and returns immediately: (sleep 1) & echo 'here' But ...
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1answer
73 views

Use ERB in tmuxinator with a bash array environment variable?

I want to use tmuxinator to open panes (and run commands with an argument in each) by looping through a bash array. Is that possible? How would I do that?
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1answer
1k views

Gem::Ext::BuildError: ERROR: Failed to build gem native extension

I have the following Dockerfile: FROM debian:stretch-backports RUN apt-get update && apt-get install -y --no-install-recommends \ build-essential \ ruby ruby-dev \ ...
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108 views

Installed zsteg with gem but command isn't recognised

I installed zsteg with gem with the line "sudo gem install zsteg" and everything installed perfectly, but when I type "zsteg" or any valid command that the zsteg documentation says should work all I ...
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1answer
662 views

How to preserve filename and folder structure when using foremost recovery program?

I am desperately needing to run the linux recovery software foremost and preserve filenames and folder structure. As you might know the program renames the recovered files with a numerical value and ...
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53 views

Why is checkinstall freezing when I try to run “make install” for Ruby 2.5.5?

I'm compiling Ruby 2.5.5 with jemalloc in a Docker container, and I'm trying to build a deb package with the checkinstall tool. Here is the Dockerfile and build script I'm using. Steps to reproduce: ...
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2answers
261 views

Choose an option from select in bash

I am trying to run gem uninstall bundler through a bash script. The issue occurs when I have multiple bundler versions installed. It prompts the number of versions, and last option is to uninstall all ...
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33 views

Easier way to run remote and monitor remote commands

I'm currently leveraging Ruby in a docker image to run some commands on my local Linux system via SSH and Tmux. However, this isn't feasible since I can't figure out a way to actually monitor the ...
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2answers
777 views

Ubuntu could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)

I'm trying to create a new user form my rails application. I already ran psql -p 5432 -h localhsot -U postgres and created a new user. Then I added the user with sudo adduser user_name and afterwards ...
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2answers
190 views

How does 'Open with' a custom executable in Linux work?

I have a file called foo.txt. I want to associate my own program with the mime-type .txt so that my program opens a terminal and shows the contents of foo.txt as standard output. I would prefer Ruby, ...
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1answer
205 views

Ruby on Rails Routing Error [closed]

I am running ruby on rails on an Ubuntu Droplet and I am encountering the following error when I navigate to my domain name: Routing Error uninitialized constant HomeController Rails.root: /home/...
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1answer
303 views

With gnu find, what is the difference between -print0 and -printf “%p\0”

In a terminal I can run... find . -type f -print0 ./testdir/testfile2.txt./testdir/testfile.txt And then... find . -type f -printf "%p\0" ./testdir/testfile2.txt./testdir/testfile.txt They both ...
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1answer
459 views

Remove multiple strings from file on command line, high performance [closed]

Is there an elegant, high-performance one-liner way to remove multiple complete strings from an input? I process large text files, e.g., 1 million lines in inputfile, and 100k matching strings in ...
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0answers
291 views

Can't install ruby on rails MacOSX

While trying to install ruby on rails with sudo gem install rails I get the following error Building native extensions. This could take a while... ERROR: Error installing rails: ERROR: Failed ...
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1answer
392 views

Ruby on NixOS — FFI Gem installation failing when building native extensions

I am a Rubyist of many years. I cannot determine what's missing to prevent FFI from installing. Here is the error from the make.out file (gotta love that name): make[3]: *** [Makefile:1048: ...
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1answer
220 views

NixOS Ruby Development - Installing all needed devkit libraries and headers to build native extensions

I'm a Ruby developer thoroughly enjoying NixOS. I just need to know how to set up dependencies to build native dependencies on gems like FFI and Nokogiri. Currently I am getting this error: The ...
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0answers
280 views

Can't access gems after installing ruby and gems with ansible

I'm working on an Ansible script to install my standard working environment (Ruby on Rails). Ansible runs under sudo, and the gems that have been installed are only accessable under sudo too. If I ...
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1answer
112 views

emerge install package with flag which not in ruby_targets

$ emerge --info | grep ruby ..... RUBY_TARGETS="ruby23" ...... And I run emerge with --newuse and --deep, it will ask me to add use flag with ruby22. These packages are not in @system. These ...
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1answer
335 views

sh script to run multiple files in multiple languages

Is it possible to have an sh script that would run a python file, run a command ruby file and run a ruby sonicPI file? What would this look like? Thank you! Adi
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1answer
71 views

Fastest way to determine if directory contents have changed since last time

I have a script that checks a directory using mdls* (to sort by added time) and them performs some operations. However, mdls is a bit slow so I’d like to run it only when absolutely necessary (i.e. ...
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1answer
108 views

where are codiad projects stored locally?

In Firefox I installed codiad as: where is ruby_hello actually located? (When it asked for the absolute path, I wasn't able to put in /home/thufir/... because of permission, so just typed in "...
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2answers
987 views

Error installing Ruby on Rails (Arch Linux)

I'm currently having an issue when trying to install Ruby on Rails on my Arch Linux ARM system. But it's also not just rails that won't install, it's anything I try to install using gem. Here is some ...
4
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1answer
2k views

Gem install producing “OpenSSL” error

For at least a week now i have been trying to install Bettercap on my Raspberry PI using gem but whenever i type in: sudo gem install bettercap i receive an error message that says ERROR: While ...
1
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1answer
46 views

How to start gem ffaker in Debian?

I install ffaker but cannot find it in my PATH masi@masi:~$ sudo gem install ffaker Fetching: ffaker-2.6.0.gem (100%) Successfully installed ffaker-2.6.0 Parsing documentation for ffaker-2.6.0 ...
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1answer
311 views

Incompatible character encoding in Jenkins can't resolve

I am attempting to run a Cucumber (Ruby) Test Suite from Jenkins that tests whether or not 2-4 byte UTF-8 characters are valid names for groups. I have tried a number of solutions and have been ...
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2answers
3k views

unable to access my rails using Public IP of my Ubuntu server in a browser

I have a Ubuntu 16.04.1 LTS (GNU/Linux 4.4.0-63-generic x86_64) server and my public IP is something like 183.xx.xxx.xx (curl -4 icanhazip.com).I have started my rails app using the command: rails s -...
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1answer
195 views

How can I use ruby gem commands like bundler when ruby is installed by nix package manager?

I'm new to nix package manager. After installing nix into Ubuntu 16.04 LTS(Japanese translated version), I installed ruby with nix-env command. Then I did gem install bundler. That seemed to work ...
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1answer
219 views

Use RVM to point to custom Ruby path

I have my ruby-2.3.1 installed in /opt/rubies/ruby-2.3.1/bin/ruby, but by some problems with dependencies KDE downloads ruby-2.1 to /usr/bin/ruby and now my system uses that version. I've install RVM ...
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1answer
39 views

How to install KDE without Ruby?

For a project I'm using Ruby 2.3.1, I'm using a CentOS7 OS with ruby 2.3.1 installed. When I run yum install kde-workspace it installs/downgrades to ruby 2.0.0.648-29.el7 which makes the application ...
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2answers
825 views

How to iterate over files using awk, bash, or ruby?

I have three markdown files on my machine: $ ls | grep md bar.md baz.md foo.md Each file has the given content: $ cat *md i am bar i am baz i am foo As an example, I'd like "loop over all the ...
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1answer
2k views

ulimit value not changing for a process

We have a ruby application that started throwing lot of "unable to create new socket: Too many open files" errors recently I have updated "etc/security/limits.conf" as below root soft nofile ...
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3answers
76 views

using linux command and gnu software inside a ruby script

Can I use ls command or wget gnu software inside a Ruby script? Actually, can I use Ruby instead of Bash , and use all of Linux commands and Gnu Software ?
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1answer
588 views

What is the best way to update Ruby 2.x on Debian 7?

In fact, my goal is to install Capistrano. Currently it requires Ruby version 2.x and higher. But Ruby is available max 1.9.3 in Debian 7. So I was faced with dilemma, which is written in the title of ...
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0answers
105 views

mysql.so: undefined symbol: vio_blocking

I'm trying to set up a Rails 2.2.2 installation (for an old app that I maintain) in a new Linux Mint 18 install. I've installed mysql (5.7.16-0ubuntu0.16.04.1 (Ubuntu)) and, using RVM, have installed ...
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1answer
1k views

Ruby version issues

I have been practising setting up a production environment with puppet, and now I'm setting up everything to accommodate HTTP requests with Apache. Since Puppet runs on Ruby, I also need Passenger ...
0
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1answer
786 views

Permission error when creating backup on gitlab omnibus installation

I am using gitlab version 7.10.4 and I am trying to upgrade the installation. But I am getting this when I tried to create back up gitlab-rake gitlab:backup:create Errno::EPERM: Operation not ...
1
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1answer
378 views

Redirecting stderr of a Ruby script not working as expected

I have a command that I think is outputting to stderr because when I redirect stdout to /dev/null I still get output printed to the screen. However, when I redirect stderr to /dev/null I also get ...
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1answer
234 views

Error installing the rmagick gem in Ruby 1.8.6 rvm - “checking for InitializeMagick() in -lMagick… no”

I have an old Rails app I maintain which uses Ruby 1.8.6. I'm trying to get a new install of Linux Mint 18 up and running so I can develop for the app. I managed to install the same (almost) version ...
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1answer
358 views

Service Start Issue Systemd

I have configured a dradis.service file in /lib/systemd/system, it is called dradis.service. And it is its content: [Unit] Description=Dradis web application [Install] WantedBy=multi-user.target [...
3
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1answer
543 views

Is there man command for bundle?

There is a command bundle in ruby. I want use man command or similar function for bundle. Does it exist? If there is it, I want to know how to look for separated command like bundle gem. I can see ...
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3answers
1k views

Kali linux : unable to “make” airdrop-ng / lorcon / pylorcon2

here is what I'm trying to do cd lorcon ./configure --libdir=/usr/lib make make install cd pylorcon2 python setup.py build python setup.py install cd ../ruby-lorcon/ ruby extconf.rb make make ...
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0answers
554 views

Howto upgrade ruby on a Ubuntu 14.04.2 (Trusty) on a Raspberry Pi 2 (armhf architecture)

I need to install json via # gem install json --no-rdoc --no-ri but I get as result ERROR: Error installing json: json requires Ruby version ~> 2.0. I use Ubuntu Trusty (this image) and ...
2
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0answers
550 views

x64_mingw not a valid platform - Rails 5

Bluehost Shared Server ruby -v 2.2.2 rails -v 5.0.0.1 gem -v 2.4.5 ~/.bashrc export HPATH=$HOME export GEM_HOME=$HPATH/ruby/gems export GEM_PATH=$GEM_HOME:/lib64/ruby/gems/1.9.3 export GEM_CACHE=$...