sudo python -m smtpd -n -c DebuggingServer localhost:25
The sudo is needed as you can’t bind to a port number lower than 1024 as a normal user.
Source: http://www.euperia.com/development/test-smtp-with-a-dummy-server-in-python/460
Session animated by Harry Percival based on the book http://www.obeythetestinggoat.com/
For having the handout:
sudo pip3 install https://github.com/django/django/archive/stable/1.7.x.zip
git log --graph --all --format=format:"%x09%C(yellow)%h%C(reset) %C(green)%ai%x08%x08%x08%x08%x08%x08%C(reset) %C(bold white)%cn%C(reset)%C(green)%d%C(reset)%n%x09%C(white)%s%C(reset)" --abbrev-commit "$@"
An alternative:
git log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit
You can also make an alias. Copy and paste the line below on your terminal:
git config --global alias.lg "log --color --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit"
And every time you need to see your log, just type in
git lg
Or, if you want to see the lines that changed
git lg -p
Source: https://coderwall.com/p/euwpig
NB: If you want to see a list of aliases set up on your linux box, just type alias at the prompt.
Simply add color to your git environment:
git config --global color.ui auto
Source: http://git-scm.com/book/en/Customizing-Git-Git-Configuration
Learn git from your browser: https://try.github.io/levels/1/challenges/1
To avoid doing all the time:
git push origin <your-feature-branch>
You can do:
git push origin <your-feature-branch> -u
You next, you will just have to do:
git push
You may be in situation where you come back from holidays and find the tests that were passing before broken.
Git can help to find which commit produced the failure.
To start bisect, run:
git bisect start
You know that the tests are failing so you indicate it with:
git bisect bad
You checkout an earlier revision when you know that the tests were passing (git log can help):
git checkout <the_failing_revision>
Then run the tests, and if they are passing, indicate it:
git bisect good
Once you have indicated that once it was bad and once it was good. You can leave git bisect do the job automatically:
git bisect run <command_that_run_the_tests>
You can now grab a coffee and come back few minutes later to see what commit made the tests failed.
Finally, you also need to come back to the original revision:
git bisect reset
Sources:
You know git log to see the history of he commits.
Once you get the results of git log, you can do 'G' (capital G) to inverse the order of commits and see the first one in time.
watch -n1 ' ps aux | grep what_you_want'
Something interesting when combined with svc:
cd /etc/service # or wherever svc (supervise) is installed watch svstat *
It will monitor every 2 seconds the state of your service.
Monitor the queries being run in real time:
watch -n 1 'sudo -u postgres psql --tuples-only --command "SELECT datname, procpid, date_trunc(\$\$second\$\$, age(current_timestamp, xact_start)), current_query FROM pg_stat_activity;"'
Source: http://kevin.deldycke.com/2011/10/postgresql-commands/
Install foxyproxy addons.
Install Foxy Proxy standard: https://chrome.google.com/webstore/detail/foxyproxy-standard/gcknhkkoolaabfmlnjonogaaifnjlfnp
Then in Tools | Extensions | Options of FoxyProxy, change the settings.
Writing 'r' will move the cursor back to the beginning of the line.
This displays a percentage counter:
import time,sys for i in range(100): time.sleep(1) sys.stdout.write("\r%d%%" %i) sys.stdout.flush()
Sourcce: http://stackoverflow.com/questions/3173320/text-progress-bar-in-the-console
The built in tutorial of Vim is very useful to know the basics. To launch it simply type the following in your terminal:
$vimtutor
It will launch some lessons with an approach 'learning by doing'.
The ~/.vimrc file provides Vim's default configuration
set textwidth=79 " lines longer than 79 columns will be broken set shiftwidth=4 " operation >> indents 4 columns; << unindents 4 columns set tabstop=4 " a hard TAB displays as 4 columns set expandtab " insert spaces when hitting TABs set softtabstop=4 " insert/delete 4 spaces when hitting a TAB/BACKSPACE set shiftround " round indent to multiple of 'shiftwidth' set autoindent " align the new line indent with the previous line
:autocmd CursorMoved * exe printf('match IncSearch /\V\<%s\>/', escape(expand('<cword>'), '/\'))
The quickest way is to hit either:
''
(two apostrophes) or:
``
(two backticks). Note that the difference is that the backtick goes to the same location on the line, whereas the apostrophe goes to the start of the line. On a UK keyboard, the apostrophe is more accessible, so I tend to use that one. There are loads of useful marks like this, see :help mark-motions. For some other motions (not 2j I think), there's also the jump-list that lets you navigate back and forth among a number of motions. Ctrl-O and Ctrl-I do this navigation, but see :help jump-motions for more information.
If you want to symlink all file in a directory to an other directory:
$ln -s /path_to_source_directory/* /path_to_destination_directory/
Find broken symlinks and delete them
$find -L /path/to/check -type l -delete
List them
$find -L /path -type l
If you want to delete them with confirmation first, do
$find -L /path -type l -exec rm -i {} +
First cd into your directory and then indicate where your symlinks will point
$find /directory_where_yout_symlinks_are/ -maxdepth 1 -type d -exec ln -s {} \;
If you want to update your existing symlinks, use the -f option such as:
$find /home/matt/workspace/unified_repos/erp_core/modules/ -maxdepth 1 -type d -exec ln -sf {} \;
It is using Github Pages. Create a repository called username.github.io, where username is your username (or organization name) on GitHub and put your website files in there.
This website is using Nikola which is a Python static website generator. Assuming that you have created a github repository called username.github.io, clone it with:
git clone git@github.com:username/username.github.io.git
Then initialize your website with this command:
nikola init username.github.io
where username.github.io is the repository you have just cloned.
cd in this directory and execute this command:
nikola build && nikola serve -b
The website will open at the url http://127.0.0.1:8000.
To deploy to Github, change the file conf.py such as:
GITHUB_DEPLOY_BRANCH = 'master'
Once you are happy with it, you can deploy to Github with the command:
nikola github_deploy
Useful cheatsheet for the basics: http://github.com/ralsina/rst-cheatsheet/raw/master/rst-cheatsheet.pdf
This is also a way to learn how to use Vim. Since Nikola 7.0.1, you can use the -e option when creating a new post. But before, you need to set up a default editor. If you want to use vim, you can first locate it:
which vim
Then you can use it in the export variable:
export EDITOR=/usr/bin/vim
nikola bootswatch_theme -n custom_theme -s spruce -p bootstrap3
pip install nikola
If you have the following error while installing nikola:
** make sure the development packages of libxml2 and libxslt are installed **
You can fix it with:
sudo apt-get install libxslt1-dev libxslt1.1 libxml2-dev libxml2 libssl-dev
Since Nikola can be installed with Pip, you can use the following command:
pip install -U nikola
To install pip, see http://pip.readthedocs.org/en/latest/installing.html
If you have the following error:
Python.h: No such file or directory
You can fix it with:
sudo apt-get install python-dev
To upgrade pip:
sudo easy_install -U pip
To downgrade pip to a previous version:
sudo easy_install pip==1.2.1
Log in to your domain provider website and change the forwarding value to the website url provided by Github-pages e.g. username.github.io