You can make a alias in your ~/.bashrc file :

    alias curl=&quot;curl -x &lt;proxy_host&gt;:&lt;proxy_port&gt;&quot;

Another solution is to use (maybe the better solution) the `~/.curlrc` file (create it if it does not exist) :

    proxy = &lt;proxy_host&gt;:&lt;proxy_port&gt;


Many UNIX programs respect the `http_proxy` environment variable, curl included. The format curl accepts is `[protocol://]&lt;host&gt;[:port]`.

In your shell configuration:

    export http_proxy http://proxy.server.com:3128

For proxying HTTP**S** requests, set `https_proxy` as well.

Curl also allows you to set this in your `.curlrc` file (`_curlrc` on Windows), which you might consider more permanent:

    http_proxy=http://proxy.server.com:3128

Curl will look for a .curlrc file in your home folder when it starts. You can create (or edit) this file and add this line:

    proxy = yourproxy.com:8080

One notice. On Windows, place your _curlrc in &#39;%APPDATA%&#39;  or &#39;%USERPROFILE%\\Application Data&#39;.

My redis instance seems to being growing very large and I&#39;d like to find out which of the multiple databases I have in there consumes how much memory. Redis&#39; `INFO` command just shows me the total size and the number of keys per database which doesn&#39;t give me much insight... So any tools/ideas that give me more information when monitoring the redis server would be appreciated.

The Redis documentation doesn&#39;t show me any commands that can return the consumed memory of certain keys, so I guess if any buggy code would write a lot of &quot;trash&quot; to redis this could be really hard to find...

Redis: Show database size/size for keys

I want to remove special characters like:

    - + ^ . : ,

from an String using Java.

How to remove special characters from a string?

How can I set up &quot;curl&quot; to permanently use a proxy server in the terminal?

How do I set up curl to permanently use a proxy?

<p>How can I set up "curl" to permanently use a proxy server in the terminal?</p>


I have some small utility scripts written in Python that I want to be usable on both Windows and Linux.  I want to avoid having to explicitly invoke the Python interpreter.  Is there an easy way to point shebang notation to the correct locations on both Windows and Linux?  If not, is there another way to allow implicit invocation of the Python interpreter on both Windows and Linux without having to modify the script when transferring between operating systems?

Edit:  The shebang support on Windows is provided Cygwin, but I want to use the native Windows Python interpreter on Windows, not the Cygwin one. 

Edit # 2:  It appears that shebang notation overrides file associations in Cygwin terminals.  I guess I could just uninstall Cygwin Python and symlink /usr/bin/python to Windows-native Python.

Shebang Notation: Python Scripts on Windows and Linux?

Basically, I need to setup a database from a bash script. I have a script db.sql that does all this. Now how do I run this script from bash?

Database system is mysql

How to execute a .sql script from bash

I work with Amazon Linux instances and I have a couple scripts to populate data and install all the programs I work with, but a couple of the programs ask:

    Do you want to continue [Y/n]?

and pause the install.  I want to auto answer &quot;Y&quot; in all cases, I&#39;m just now sure how to do it.












How do I script a &quot;yes&quot; response for installing programs?

I am trying to use addr2line command in Unix but everytime it is giving the same output as ??:0. I am giving command as `addr2line -e  a.out  0x4005BDC` . I got this address while running this a.out executable with `valgrind` tool to find the memory leakage. I also compiled the source code with `-g` option. 

How to use the addr2line command in Linux?

How do I get the [Olson timezone name][1] (such as `Australia/Sydney`) corresponding to the value given by C&#39;s [`localtime`][2] call?

This is the value overridden via `TZ`, by symlinking `/etc/localtime`, or setting a `TIMEZONE` variable in time-related system configuration files.

  [1]: http://en.wikipedia.org/wiki/Tz_database#Names_of_time_zones
  [2]: http://docs.python.org/py3k/library/time.html#time.localtime

Get the Olson TZ name for the local timezone?

I get this error when I try to access localhost/phpmyadmin:

 *Wrong permissions on configuration file, should not be world writable!*

I have already chmoded every file to 555 from 777. What should I do next? I run Ubuntu 11.04.

PhpMyAdmin &quot;Wrong permissions on configuration file, should not be world writable!&quot;

I was trying to install rails on Ubuntu Natty Narwhal 11.04, using ruby1.9.1.

I installed ruby using `apt-get install ruby1.9.1-full` which contains the dev package. I googled the error and all have suggested I install the 1.9.1-dev which I already have.

	Building native extensions.  This could take a while...
	ERROR:  Error installing rails:
		ERROR: Failed to build gem native extension.

	        /usr/bin/ruby1.8 extconf.rb
	extconf.rb:36:in `require&#39;: no such file to load -- mkmf (LoadError)
		from extconf.rb:36


	Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/bcrypt-ruby-3.0.1 for inspection.
	Results logged to /usr/lib/ruby/gems/1.8/gems/bcrypt-ruby-3.0.1/ext/mri/gem_make.out

`require&#39;: no such file to load -- mkmf (LoadError)

How do I write a script to install MySQL server on Ubuntu?

`sudo apt-get install mysql` will install, but it will also ask for a password to be entered in the console.

How do I do this in a non-interactive way? That is, write a script that can provide the password? 

    #!/bin/bash
    sudo apt-get install mysql  # To install MySQL server

    # How to write script for assigning password to MySQL root user
    # End


Install MySQL on Ubuntu without a password prompt

I&#39;m new to Linux and R.

I installed R 2.12 in Ubuntu 11.04. Today I tried to install a new package, so I ran the following command:

    install.packages(&#39;XML&#39;)

But the installation failed and gave the following information:

    * installing *source* package ‘XML’ ...
    checking for gcc... gcc
    checking for C compiler default output file name... a.out
    checking whether the C compiler works... yes
    checking whether we are cross compiling... no
    checking for suffix of executables... 
    checking for suffix of object files... o
    checking whether we are using the GNU C compiler... yes
    checking whether gcc accepts -g... yes
    checking for gcc option to accept ISO C89... none needed
    checking how to run the C preprocessor... gcc -E
    No ability to remove finalizers on externalptr objects in this verison of R
    checking for sed... /bin/sed
    checking for pkg-config... /usr/bin/pkg-config
    checking for xml2-config... no
    Cannot find xml2-config
    ERROR: configuration failed for package ‘XML’
    * removing ‘/home/spirit/R/i686-pc-linux-gnu-library/2.12/XML’
    
    The downloaded packages are in
    	‘/tmp/RtmpoZYxnv/downloaded_packages’
    Warning message:
    In install.packages(&quot;XML&quot;) :
      installation of package &#39;XML&#39; had non-zero exit status

I also tried:

    sudo install.packages(&#39;XML&#39;)

But it gives the same error information.

Anyone can give me any advice?

Unable to install R package in Ubuntu 11.04

I have installed gcc-3.3/g++-3.3 on ubuntu 11.04 which already has gcc/g++-4.4. So in my system both gcc-3.3 and 4.4 are available. I am able to call both compilers as I want. If I just call the command `gcc` then gcc-4.4 will get called. To call gcc-3.3, I have to use the command `gcc-3.3`. 

How can I change the default compiler as gcc-3.3? When I execute the command `gcc` it should call the gcc-3.3 and not gcc-4.4.

In addition, how can I change the variable CXX in a make file to gcc-3.3? I wish to change one common global place in the system instead of changing all make files.

How to change the default GCC compiler in Ubuntu?

I need to check if a particular file exists on a remote server. Using `is_file()` and `file_exists()` doesn&#39;t work. Any ideas how to do this quickly and easily?

How to check if a file exists from a url

I want to make the following `curl` call in my C# console application:

&lt;!-- language-all: lang-sh --&gt;

    curl -d &quot;text=This is a block of text&quot; \
        http://api.repustate.com/v2/demokey/score.json

I tried to do like the question posted [here][1], but I cannot fill the properties properly.

I also tried to convert it to a regular HTTP request:

&lt;!-- language: lang-none --&gt;

    http://api.repustate.com/v2/demokey/score.json?text=&quot;This%20is%20a%20block%20of%20text&quot;

Can I convert a cURL call to an HTTP request?  If so, how?  If not, how can I make the above cURL call from my C# console application properly?

  [1]: https://stackoverflow.com/questions/5152723/curl-with-user-authentication-in-c-sharp


Making a cURL call in C#

I&#39;m wondering if/how you can add custom headers to a cURL HTTP request in PHP. I&#39;m trying to emulate how iTunes grabs artwork and it uses these non-standard headers:

    X-Apple-Tz: 0
    X-Apple-Store-Front: 143444,12

How could I add these headers to a request?

PHP cURL custom headers

I have written this simple piece of code :

    $ch = curl_init();
    		
    //Set options
    curl_setopt($ch, CURLOPT_URL, &quot;http://www.php.net&quot;);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $website_content = curl_exec ($ch);

In my case `$website_content` comes as `false`.
Can anyone suggest/advice something what could be going wrong?

 

curl_exec() always returns false

If I try to pass a URL to curl that contains brackets, it fails with an error:

    $ curl &#39;http://www.google.com/?TEST[]=1&#39;
    curl: (3) [globbing] illegal character in range specification at pos 29

However, if I escape both brackets, it appears to work:

    $ curl &#39;http://www.google.com/?TEST\[\]=1&#39;


Interestingly, I use a backslash to escape *only* the first bracket it fails silently with error code 20497:

    $ curl &#39;http://www.google.com/?TEST\[]=1&#39;
    $ echo $!
    20497

My question is how to fix this for general cases? Is there an argument that will escape URLs automatically, or a description of the characters that need to be escaped before passing to curl?

Content Type	Original Author	Original Content on Stackoverflow
Question	Ben	View Question on Stackoverflow
Solution 1 - Linux	Sandro Munda	View Answer on Stackoverflow
Solution 2 - Linux	Peter T	View Answer on Stackoverflow
Solution 3 - Linux	Trevor	View Answer on Stackoverflow
Solution 4 - Linux	feech	View Answer on Stackoverflow

How do I set up curl to permanently use a proxy?

Linux Problem Overview

Linux Solutions

Solution 1 - Linux

Solution 2 - Linux

Solution 3 - Linux

Solution 4 - Linux

How to remove special characters from a string?

Redis: Show database size/size for keys

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