terminal - Error upgrading Ruby to 1.9.3 on OS X 10.7.5 using zsh - Command not found: rvm -

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i've been trying follow tutorial upgrade ruby i'm getting "command not found: rvm" in terminal.

➜  ~  rvm zsh: correct 'rvm' 'rvim' [nyae]? n zsh: command not found: rvm

i'm getting stuck after step 2: load rvm shell. i've added 

[[ -s "$home/.rvm/scripts/rvm" ]] && source "$home/.rvm/scripts/rvm"

into .zshrc file additional lines i've found in other answers similar question. file contents now: 

# path oh-my-zsh configuration. zsh=$home/.oh-my-zsh  # set name of theme load. # in ~/.oh-my-zsh/themes/ # optionally, if set "random", it'll load random theme each # time oh-my-zsh loaded. zsh_theme="robbyrussell"  # example aliases # alias zshconfig="mate ~/.zshrc" # alias ohmyzsh="mate ~/.oh-my-zsh"  # ruby 1.9 __rvm_project_rvmrc  alias rvm-promt=$home/.rvm/bin/rvm-prompt # added 2013/09/13 source $zsh/oh-my-zsh.sh [[ -s "$home/.rvm/scripts/rvm" ]] && source "$home/.rvm/scripts/rvm"  # set use case-sensitive completion # case_sensitive="true"  # comment out disable bi-weekly auto-update checks # disable_auto_update="true"  # uncomment change how many wait before auto-updates occur? (in days) # export update_zsh_days=13  # uncomment following line if want disable colors in ls # disable_ls_colors="true"   # uncomment following line if want disable autosetting terminal title. # disable_auto_title="true"

i've download xcode 4.6.3 , installed command line tools. how upgrade work? thanks.

edit: relaunched terminal before trying rvm command.


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