Steps to reinstall rvm in ubuntu

Uninstall RVM – do the following

unset GEM_HOME

rvm implode

rm -rf ~/.rvm

rm -rf /usr/share/rvm

sudo rm /etc/profile.d/

sudo rm /etc/rvmrc

sudo rm ~/.rvmrc

vim ~/.zshrc  # or ~/.bash_profile related to machine/software you use and remove rvm related lines

Install RVM:

sudo apt-get install build-essential

unset rvm_path

sudo apt install gnupg2

Goto and add gpg keys to verify

gpg --keyserver hkp:// --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
\curl -sSL | bash -s stable

If the following error occurs while adding keys:

➜ gpg --keyserver hkp:// --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
gpg: connecting dirmngr at '/run/user/1000/gnupg/S.dirmngr' failed: IPC connect call failed
gpg: keyserver receive failed: No dirmngr

then do:

sudo apt-get update

then you will get some errors regarding the keys, add those keys to following command:

gpg --keyserver hkp:// --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

then do:

\curl -sSL | bash -s stable

Make sure that your ~/.bash_profile or ~/.zshrc file contains the following lines to load rvm to the shell:

# RVM manual script for loading rvm to shell
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" 

After installing RVM check by:

➜ rvm list

# No rvm rubies installed yet. Try 'rvm help install'.

➜ rvm install 2.7.2
Searching for binary rubies, this might take some time.
Found remote file
Checking requirements for ubuntu.
Requirements installation successful.
ruby-2.7.2 - #configure
ruby-2.7.2 - #download
No checksum for downloaded archive, recording checksum in user configuration.
ruby-2.7.2 - #validate archive
ruby-2.7.2 - #extract
ruby-2.7.2 - #validate binary
ruby-2.7.2 - #setup
ruby-2.7.2 - #gemset created ~/.rvm/gems/ruby-2.7.2@global
ruby-2.7.2 - #importing gemset ~/.rvm/gemsets/global.gems..................................
ruby-2.7.2 - #generating global wrappers.......
ruby-2.7.2 - #gemset created ~/.rvm/gems/ruby-2.7.2
ruby-2.7.2 - #importing gemsetfile ~/.rvm/gemsets/default.gems evaluated to empty gem list
ruby-2.7.2 - #generating default wrappers.......

➜ rvm list
=* ruby-2.7.2 [ x86_64 ]

# => - current
# =* - current && default
#  * - default

➜ rvm gemset list

gemsets for ruby-2.7.2 (found in ~/.rvm/gems/ruby-2.7.2)
=> (default)

➜ rvm gemset create foobar
ruby-2.7.2 - #gemset created ~/.rvm/gems/ruby-2.7.2@foobar
ruby-2.7.2 - #generating foobar wrappers.......

➜ rvm gemset list              

gemsets for ruby-2.7.2 (found in ~/.rvm/gems/ruby-2.7.2)
=> (default)

➜ rvm gemset use foobar
Using ruby-2.7.2 with gemset foobar

➜ rvm gemset list           

gemsets for ruby-2.7.2 (found in ~/.rvm/gems/ruby-2.7.2)
=> foobar

➜ rvm list gemsets

rvm gemsets

   ruby-2.7.2 [ x86_64 ]
=> ruby-2.7.2@foobar [ x86_64 ]
   ruby-2.7.2@global [ x86_64 ]

For preserving the gemset for the current directory create .rvmrc file:

vim .rvmrc
# add this: rvm --rvmrc use foobar

If rvm is not loading into the shell after changing the terminal preferences, check the rvm_path env variable.

zsh: no such file or directory: /usr/share/rvm

If you don’t have that directory you must change the above path to a correct rvm installed path.

By default rvm installed in this path: ${HOME}/.rvm So you can add this path to rvm_path

So set it like:

export rvm_path="${HOME}/.rvm"

You can add this line into your ~/.zshrc OR ~/.bash_profile file.

You can check rvm env variables and info by:

env | grep rvm  
rvm info

Check ruby version by: ruby -v If ruby is not loading try to add the following line into your bash_profile:

export PATH=~/.rvm/gems/ruby-2.7.2/bin:$PATH # change version: ruby-2.7.2 to your installed version
source ~/.bash_profile OR source ~/.zshrc # whatever you use
ruby -v

Backup your system databases using Ruby backup gem

Install RVM (Or Rbenv) to manage your Ruby versions

 $ gpg --keyserver hkp:// --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
 $ curl -sSL | bash 

Restart Terminal and type rvm -v

 $ rvm install 2.5
 $ rvm gemset create backup
 $ rvm gemset use backup
 $ gem install backup
 $ backup generate:model --trigger project_2_backup --archives --storages='s3' --compressor='gzip' --notifiers='mail' 
 Generated configuration file: '/home/ubuntu/Backup/config.rb'.
 Generated model file: '/home/ubuntu/Backup/models/project_2_backup.rb'.
   backup generate:model --trigger=TRIGGER
   [--config-path=CONFIG_PATH]  # Path to your Backup configuration directory
   [--databases=DATABASES]      # (mongodb, mysql, postgresql, redis, riak)
   [--storages=STORAGES]        # (cloudfiles, dropbox, ftp, local, ninefold, rsync, s3, scp, sftp)
   [--syncers=SYNCERS]          # (cloud_files, rsync_local, rsync_pull, rsync_push, s3)
   [--encryptors=ENCRYPTORS]    # (gpg, openssl)
   [--compressors=COMPRESSORS]  # (bzip2, gzip, lzma, pbzip2)
   [--notifiers=NOTIFIERS]      # (campfire, hipchat, mail, presently, prowl, twitter)
   [--splitter]                 # use `--no-splitter` to disable
                               # Default: true 

Sample Model File

Add the following conf in Backup/models/project_2_backup.rb:

Example for mongodb

 database MongoDB do |db|               = "db_name"
     db.username           = "db_username"
     db.password           = "db_pswd"               = "localhost"
     db.port               = 27017 
     db.ipv6               = false
     #db.only_collections   = ["only", "these", "collections"]
     db.additional_options = ['--authenticationDatabase=admin']
     db.lock               = false
     db.oplog              = false
   # Amazon Simple Storage Service [Storage]
   store_with S3 do |s3|
     # AWS Credentials
     s3.access_key_id     = "YOUR_ACCESS_KEY"
     s3.secret_access_key = "YOUR_SECRET_KEY"
     # Or, to use a IAM Profile:
     # s3.use_iam_profile = true
     s3.region            = "ap-southeast-2" 
     s3.bucket            = "bucket_name"
     s3.path              = "bucket_name_path"
     s3.keep              = 12
     # s3.keep              = - 2592000 # Remove all backups older than 1 month.

 # Notification mail infos
 notify_by Mail do |mail|
     mail.on_success           = true
     mail.on_warning           = true
     mail.on_failure           = true
     mail.from                 = ""                   = ""                   = ","
     #mail.bcc                  = ""
     #mail.reply_to             = "" 
     mail.address              = ""
     mail.port                 = 587
     mail.domain               = "domain_name"
     mail.user_name            = "email_username"
     mail.password             = "email_password"
     mail.authentication       = "plain"
     mail.encryption           = :starttls

Once you’ve setup your configuration, check your work with:

$ backup check

If there are no errors, the check should report:

[2019/03/28 10:02:26][info] Configuration Check Succeeded.

Perform Backup:

$ backup perform --trigger project_2_backup

The Keep Option

keep a specified number of backups in storage. After each backup is performed, it will remove older backup package files based on the keep setting.

keep as a Number

If a number has been specified and once the keep limit has been reached, the oldest backup will be removed.

Note that if keep is set to 5, then the 6th backup will be transferred and stored, before the oldest is removed. So be sure you have space available for keep + 1 backups

keep as Time

When a Time object is set to keep it will keep backups until that time. Everything older than the set time will be removed.

Install Rails 3.2 using rvm on redhat

Upgrade Packages

yum update

Installing Recommended Packages

yum install gcc-c++ patch readline readline-devel zlib zlib-devel 
yum install libyaml-devel libffi-devel openssl-devel make 
yum install bzip2 autoconf automake libtool bison iconv-devel

Install RVM ( Ruby Version Manager )

$ curl -L | bash -s stable

Install Required Ruby Version

$ rvm install 1.9.3

Install rails

$ gem install rails --version '3.2.19'

Install Rails 3.2 with Ruby 1.9.3 using rvm in Ubuntu 14.0.1

Check ruby is already installed in your system or not

$ ruby -v 

Install curl if not installed

$ sudo apt-get install curl

Check curl version by

$ curl --version

Install RVM

Execute the command in the terminal

$ curl -L | bash -s stable

If the installation is done, close the terminal window and open it again to load the rvm into the shell

Check rvm version

$ rvm -v

rvm 1.25.30 (stable) by Wayne E. Seguin , Michal Papis  []

List rvm known rubies

$ rvm list known

Use rvm to install ruby 1.9.3

$ rvm install 1.9.3

Check the ruby versions available

$ rvm list rubies

Check the ruby version by

$ ruby -v

If this again shows the message to install ruby, then set this ruby version as default

$ rvm use ruby-1.9.3-p547 --default

then check ruby -v

Make gem package up to date

$ gem update

Install Rails 3.2.19

$ gem install rails --version '3.2.19'

Check rails version

$ rails -v 

You are ready to go!

Install Rails 4.0 with Ruby 2.0

Get the stable version of rvm:

$ rvm get stable

Install Ruby 2.0

$ rvm install ruby-2.0.0

Create a Gemset;

$ rvm gemset create rails-4.0

Goto that gemset:

$ rvm use ruby-2.0.0-p247@rails-4.0

Install Rails 4.0

$ gem install rails --version=4.0

Create an rvmrc file in root folder:

$ vim rvmrc
$ rvm --rvmrc use ruby-2.0.0-p247@rails-4.0

uncomment the line gem ‘therubyracer’, platforms: :ruby from Gemfile

Start the server:

$ rails s

You are ready to go!!

Changes that you may need to perform while working with Rails 4 compared to old versions:

1. Check here for the New changes in Rails 4
2. If you are using devise gem use devise version 3 or above (

Rails mysql2 gem getting error checking for mysql_query() in -lmysqlclient… no

Make sure that you have installed mysql server and mysql client. Else install by

$ sudo apt-get install mysql-server
$ sudo apt-get install mysql-client

After that install the dependency library for mysql

$ sudo apt-get install libmysql-ruby libmysqlclient-dev

Install RVM, Ruby on CentOS

First download the Ruby Version Manager (RVM) installer as follows

$ sudo bash -s stable < <(curl -s )

RVM requires to add relevant users to it’s group. Open the file like so:

$ sudo vim /etc/group

Edit the ‘rvm’ group (likely the last entry) to look like:

Run the install:

$ cd /usr/local/rvm/bin
$ sudo ./rvm-installer

“Upgrade of RVM in /usr/local/rvm/ is complete.”

I needed to reload the RVM to continue, this might not be required:

$ rvm reload

If it shows -bash: rvm: command not found

please close the terminal and start it again to load the RVM.

Now we can install the Ruby version. This will also install rubygems which is always useful…

$ rvm install 1.9.3 --with-openssl-dir=/usr
$ ruby -v
$ rvm use ruby-1.9.3-p327 --default

If you are getting nokogiri error like:

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

checking for libxslt/xslt.h… no

libxslt is missing.

then install

$ sudo yum install -y gcc ruby-devel libxml2 libxml2-devel libxslt libxslt-devel


Install Rails 3 on Ubuntu 10.04 Lucid Lynx Using RVM with Mysql and sphinx

First install ‘curl’ and ‘git’

  • step 1: install curl
    $ sudo apt-get install curl
  • step 2: install git
    $ sudo apt-get install git-core
  • Then install RVM

  • step 3: install rvm
    $ bash < <( curl )
  • step 4: edit .bashrc file to load rvm into the shell session
    $ gedit .bashrc
    Add the following line to the end of the file:
    if [[ -s “$HOME/.rvm/scripts/rvm” ]] ; then source “$HOME/.rvm/scripts/rvm” ; fi
  • step 5 : restart linux
    $ sudo reboot
  • step 6 : type
    $ rvm notes
    In the notes RVM tells you what packages you’re gonna need to install for various flavors of Ruby. Since we’re going with 1.9.2 we want the packages it lists under the MRI & ree section. Let’s install those now.
    $ sudo aptitude install build-essential bison openssl libreadline5 libreadline-dev curl git-core zlib1g zlib1g-dev libssl-dev vim libsqlite3-0 libsqlite3-dev sqlite3 libreadline-dev libxml2-dev git-core subversion autoconf
  • Install Ruby 1.9.2

  • step 7 : install ruby 1.9.2 through rvm
    $ rvm list known
    $ rvm install 1.9.2-head
    for 64bit:
    $ rvm install 1.9.2
  • step 8 : make ruby 1.9.2 as default
    $ rvm –default ruby-1.9.2-head
    for 64bit:
    $ rvm –default ruby-1.9.2
    check ruby version
    $ ruby -v
  • Install Rails 3

  • step 9 : Install rails 3
    $ gem install i18n tzinfo builder memcache-client rack rack-test rack-mount erubis mail text-format thor bundler
    $ gem install rails –pre
  • Select your database

  • step 10 : Install database
    For Sqlite3
    $ sudo apt-get install sqlite3 libsqlite3-dev
    $ gem install sqlite3-ruby
    $ sudo apt-get update
    For Mysql goto synaptic package manager and type
    mysql-server, mysql-client and install and set password.
    Install mysql client libraries :
    $ sudo aptitude install libmysqlclient16-dev
    $ sudo apt-get install libmysql-ruby libmysqlclient-dev
  • Install Sphinx

  • If you want sphinx, install Sphinx
    $ wget
    $ tar xzvf sphinx-
    $ cd sphinx-
    $ ./configure
    $ make
    $ sudo make install
  • To know about sphinx type
    $ search

If you are getting error when starting sphinx make sure that the ‘indexer’,’searchd’,’search’ is under /usr/local/bin or under where sphinx specifies.
You are now ready to go…