The easiest, fastest and safest way to get your ip address

curl ifconfig.me

thanks to AskUbuntu

useful links

• less shitty internet explorer
• Ruby Quick Tips
• jquery vector map
• syntax highlighter
• google analytics and adwords webinars
• HTML5 support
• teach events
• Sublime Text 2 and Ruby on Rails screencast 
• Rspec info
• Capybara matchers
• CDN

Useful Shell commands in Linux (terminal)

find . -name file_name # path first option without equal
grep -rn string . --context=5      # path last

# count the lines of ruby
( find ./ -name '*.rb' -print0 | xargs -0 cat ) | wc -l

rails -e production
rake x:y x:z RAILS_ENV=test # chain tasks and env is loaded only once
rails c production --sandbox 
rails dbconsole -p'whatever'
tailf log/development.log | grep -v ECONNREFUSED -E 'Processing|Render|Parameters' # show actions and templates only
ssh user@host 'ls -l'
scp -C user@host /tmp/db.sql /tmp/db.sql # -C will compress the data over the wire
curl -Lk --user user:pwd --data "param1=value1&param2=value2" http://url
service --status-all
netstat -an | grep "LISTEN " # check the open ports
free -m # check the ram
df -H   # check the disk
curl --user usr:pwd -Lkv --data "param1=value1&param2=value2" www.url.com/post_here
scp -C urs@url:/origin/ destination/ 

ncdu / # disk usage

Git cheatsheet

# Search for a word in log diff
git log -S"def email_required"

# display branches in activity order
git for-each-ref --sort=-committerdate --format='%(committerdate:short) %(refname)' refs/heads refs/remotes 

# checkout previous branch
git checkout -
git checkout @{-1}
# get rid of the latest changes and restore to the sha
git checkout sha1

# undo latest pull
git reset HEAD@{1}
git checkout .

# discard conflicting changes in a dir (after merge)
git co --theirs dir/ # discard their changes
git co --ours dir/   # discard our changes

# stash
git stash save "name of the stash"
git stash apply
git stash help

# checkout a new branch from origin
git checkout -b new origin/new

# tags
git tag "tag-name"
git push --tags

# bisect for debugging
git bisect start
git bisect bad
git co 32c4bf6 # (known good sha)
git bisect good

# create a patch
git format-patch -1 sha1
# and to apply it
git am 0001-commit-name.patch 

# ignore a committed file
# add the file to .gitignore
git rm --cache your_file

# ignore the repo
git update-index --assume-unchanged .ruby-version

# delete a remote branch
git push origin --delete branch_name

# rename a branch
git branch -m old_name new_name

# all your commits on any branch in the last x months
git log --pretty=format:"%ad:%h:%B" --date=short --reverse --all --author=erik  --since=1.day.ago

# count the lines of code of your app
git ls-files app/ | xargs wc -l

# undo a merge that was already pushed:
git revert -m 1 merge_hash
#
#

Here great post on git tips .gitignore_global (add .rbenv-gemsets)

Here's my git config

Git style guide

Best practices