bash: defining a variable with or without export

What is export for? What is the difference between:

export name=value

generate a core dump in linux

I have a process in linux that's getting a segmentation fault. How can I tell it to generate a core dump when it fails?

bash: redirect and append both stdout and stderr

To redirect stdout in bash, overwriting file

cmd > file.txt

To redirect stdout in bash, appending to file

How do I write stderr to a file while using "tee' with a pipe?

I have the below command line argument which will print the output of aaa.sh to the screen while also writing stdout to bbb.out; however I would also like to write stderr to a file ccc.out. Any suggestions on how to modify the below piece? Thanks!

Can a shell script set environment variables of the calling shell?

I'm trying to write a shell script that, when run, will set some environment variables that will stay set in the caller's shell.

bash - automatically capture output of last executed command into a variable

I'd like to be able to use the result of the last executed command in a subsequent command. For example,

Pipe to/from Clipboard

Is it possible to pipe to/from the clipboard in bash? Whether it's piping to/from a device handle or using an auxiliary application, I can't find anything.

BASH: Possible to abort shell script if any command returns a non-zero value?

I have a Bash shell script that invokes a number of commands. I would like to have the shell script automatically exit with a return value of 1 if any of the commands return a non-zero value.

How do I check syntax in bash without running the script?

Is it possible to check a bash script syntax without executing it?

Exclude .svn directories from grep

When I grep my Subversion working copy directory, the results include a lot of files from the .svn directories. Is it possible to recursively grep a directory, but exclude all results from .svn directories?

unix shell script find out which directory the script file resides?

Basically I need to run the script with paths related to the shell script file location, how can I change the current directory to the same directory as where the script file resides?

Best way to kill all child processes

I basically want to kill a whole process tree. What is the best way to do this using any common scripting languages. I am looking for a simple solution.

How do I tell if a file does not exist in bash?

I've used the following script to see if a file exists:

In the bash script how do I know the script file name?

How can I determine the name of the bash script file inside the script itself?

How do I prompt for input in a Linux shell script?

I want to pause input in a shell script, and prompt the user for choices. The standard 'Yes, No, or Cancel' type question. How do I accomplish this at a typical bash prompt?

How can I get `find` to ignore .svn directories?

I often use the find command to search through source code, delete files, whatever. Annoyingly, because Subversion stores duplicates of each file in its .svn/text-base/ directories my simple searches end up getting lots of duplicate results. For example, I want to recursively search for uint in multiple messages.h and messages.cpp files:

How do I iterate over a range of numbers in bash?

How do I iterate over a range of numbers in bash when the range is given by a variable?

How to count all the lines of code in a directory recursively?

We've got a PHP application and want to count all the lines of code under a specific directory and its subdirectories. We don't need to ignore comments, as we're just trying to get a rough idea.

Split string based on delimiter in Bash?

How do I split a string based on a delimiter in Bash?

generate php classes in bash

i have this script:

#!/bin/bash



  if [[ -z "$1" ]] ; then

      echo "Class is required"

      exit 1;

  fi



  if [[ -z "$2" ]] ; then

      package="Default"

  else

      package=$2;

  fi



  echo "<?php

  /**

   * $1.class.php

   * 

   * Vcard class file.

   * @name        Project

   * @author      Author

   * @link        http://www.domain.com

   * @copyright   Copyright © 2011

   * @package     $package

   * @version     1.0

  */



  /**

   * The main $1 class

   * @package $package

  */

  class $1 {



      /**

       * Constructor setup.

       */

      public function __construct() {

      }



      /**

       * Destructor setup.

       */

      public function __destruct() {

      }

  }

  " > $1.class.php



  php -l $1.class.php

  echo "Done";