VIM Cheat Sheet

This is my VIM cheat sheet and i'm building it day-by-day.

Managing Windows

:vsplit: open another window of current buffer at the current tab.

:vs | view [filePath]: open the [filePath] into a new window at current tab.

My PHP MVC good pratices;

About method's parameters:

All parameters passed through during a method call must be, when possible, objects which types are the main type handled by the object whose method are being called. For instance, suppose we have a CommandsModel class that handle Command objects and we want to create and persist a new Command, so the create method signature could look like this:

+ create(newCMD : Command ) : Command

About models:

Every Create method should return the created object;

Indent multiple lines in Vim.

I must to confess that during some time I had done the boring task of reselect every line and indent it again after a wrong multi line indenting on VIM. But, today, i saw some tricks on superuser.com that changed a little bit of my life. And the trick are:

Hit the "." (period) in command mode to repeat your last edit.

by Alex

White coffee

Ingredients:

• 150ml of water;
• 2.8g of soluble café;
• 23g of corn sugar;
• milk to taste;

Running console command from VIM

This days i was thinking about how to run a Python script currently opened on VIM. After few minutes of googling, i found this solution by grouping some nippets found at some sites.

Inside VIM, under command mode, run this lines:

:let runner="python"
:let myArgs="put your args here. If you have not args let this be an empty string"
:w|execute '!cls &&; '.runner.' "%:p" '.myArgs

One thing We must keep in mind is that execute parses the entire string. So, if You are on Windows and want run something like Mozilla Firefox, You must use:

:let runner="\"C:\\Program Files\\Mozilla Firefox\\firefox.exe\""
:let myArgs=""
:w|execute '!cls &&; '.runner.' "%:p" '.myArgs

How to Generate Random Strings on Linux Terminal

One of the great things about Linux is that you can do the same thing hundreds of different ways—even something as simple as generating a random password can be accomplished with dozens of different commands. Here’s 10 ways you can do it.
We gathered all of these commands from Command-Line Fu and tested them out on our own Linux PC to make sure they work. You should be able to use at least some of these on Windows with Cygwin installed, though we didn’t test all of them—the last one definitely works though.

Generate a Random Password

For any of these random password commands, you can either modify them to output a different password length, or you can just use the first x characters of the generated password if you don’t want such a long password. Hopefully you’re using a password manager like LastPass anyway so you don’t need to memorize them.
This method uses SHA to hash the date, runs through base64, and then outputs the top 32 characters.

date +%s | sha256sum | base64 | head -c 32 ; echo

This method used the built-in /dev/urandom feature, and filters out only characters that you would normally use in a password. Then it outputs the top 32.

< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-32};echo;

This one uses openssl’s rand function, which may not be installed on your system. Good thing there’s lots of other examples, right?

openssl rand -base64 32

This one works a lot like the other urandom one, but just does the work in reverse. Bash is very powerful!

tr -cd '[:alnum:]' < /dev/urandom | fold -w30 | head -n1

Here’s another example that filters using the strings command, which outputs printable strings from a file, which in this case is the urandom feature.

strings /dev/urandom | grep -o '[[:alnum:]]' | head -n 30 | tr -d '\n'; echo

Here’s an even simpler version of the urandom one.

< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c6

This one manages to use the very useful dd command.

dd if=/dev/urandom bs=1 count=32 2>/dev/null | base64 -w 0 | rev | cut -b 2- | rev

You can even create a random left-hand password, which would let you type your password with one hand.

</dev/urandom tr -dc '12345!@#$%qwertQWERTasdfgASDFGzxcvbZXCVB' | head -c8; echo ""

If you’re going to be using this all the time, it’s probably a better idea to put it into a function. In this case, once you run the command once, you’ll be able to use randpw anytime you want to generate a random password. You’d probably want to put this into your ~/.bashrc file.

randpw(){ < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16};echo;}

You can use this same syntax to make any of these into a function—just replace everything inside the { }
And here’s the easiest way to make a password from the command line, which works in Linux, Windows with Cygwin, and probably Mac OS X. I’m sure that some people will complain that it’s not as random as some of the other options, but honestly, it’s random enough if you’re going to be using the whole thing.

date | md5sum

Yeah, that’s even easy enough to remember.

---

There’s loads of other ways that you can create a random password from the command line in Linux—for instance, the mkpasswd command, which can actually assign the password to a Linux user account. So what’s your favorite way?

Original Source: HowToGeek

ConEmu, a great CMD.exe alternative in Windows

Hi!
ConEmu is a open source console emulator for Windows with great features like:

• Multitabs
• Progress status for I/O blocking tasks like "cp", "zip", etc.
• Support to shells others than CMD.exe, like: GitBash, CygWin
• Etc...

Check this video to some of coolest features:

Now that you know something about it, just try it. :)

Thanks to Maximus5 and Michael Lukashov.