Help

help

# [1] Definir o Vim como editor default
# http://vim.wikia.com/wiki/Set_Vim_as_your_default_editor_for_Unix
# no ubuntu

$~> sudo update-alternatives --config editor

# [2] Instalando pacotes .deb no linux
$~> sudo dpkg -i nome_do_infeliz.deb 
# [2.1] Removendo pacotes .deb no linux
$~> sudo dpkg --purge nome_do_infeliz
# [2.2] Listando pacotes .deb no linux
$~> sudo dpkg -l | grep nome_do_infeliz

# [3] Buscando valores entre datas em rails
Pessoa.where(:created_at => params["data_inicial"].to_date.beginning_of_day..params["data_final"].to_date.end_of_day)

# [4] com problemas para executar git commit --amend
# Consider using Damien Cassou's PPA:
# To add this PPA:

$~> sudo add-apt-repository ppa:cassou/emacs
$~> sudo apt-get update

# For emacs-snapshot:

$~> sudo apt-get install emacs-snapshot-el emacs-snapshot-gtk emacs-snapshot

# Or, for emacs24 (i.e. 24.3, stable):

$~> sudo apt-get install emacs24 emacs24-el emacs24-common-non-dfsg

# Update

# As mentioned in Damien Cassou's PPA, the repository will not be maintained further (currently features Emacs 24.3) and it is 
# recommended to use the Ubuntu Elisp PPA.

# Hence, use this to add the PPA:

$~> sudo add-apt-repository ppa:ubuntu-elisp/ppa
$~> sudo apt-get update
$~> sudo apt-get install emacs-snapshot emacs-snapshot-el

# Ref: Emacs guide

# Procurando pacotes no repositório do linux:

$~> apt-cache search keyword

# Alterar a senha do usuário no postgresql

ALTER USER "user_name" WITH PASSWORD 'new_password';