On CentOS, the python development libraries are under the name `python-devel`, not `python-dev`.

So you should use

    sudo yum install python-devel

to install them on your CentOS system.

You can search the repositories available to you using the `yum search xxxxx` command, where xxxxx is the name or part of the name of the package you are looking for.

Further, you may need to specify the architecture (such as python-devel.x86_64), although in my experience yum will automatically install the package that is appropriate for your system. Again, `yum search` will show you what is available in the repositories you currently have installed/enabled.

Did you try

`yum groupinstall -y &#39;development tools&#39;`

Did you try to download the RPM package and install it?

Did you try to install python-pip then issue `pip install python-dev`?


For anyone looking to install python-devel now, you can use `yum install platform-python-devel.x86_64`

Has anyone come across a similar Maven error as below?

I am unable to build my project due to the error below. All was working previously fine before I started working on the code.

I did not even work on the below defined interfaces and it seems to be related to Javadoc?


    [ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:2.9.1:jar (attach-javadocs) on project jonney-project: MavenReportException: Error while creating archive:
    
    [ERROR] Exit code: 1 - /Users/me/Work/myProject/library/src/main/java/com/me/someInterface.java:45: warning: no @return
    [ERROR] public abstract boolean searchForDevce();
    [ERROR] ^
    [ERROR] /Users/me/Work/myProject/src/main/java/com/me/someInterfaceAgain.java:52: warning: no @return
    [ERROR] public abstract boolean selectDevice(int pos);
    [ERROR] ^



Unable to build Maven project due to Javadoc error?

&lt;!-- language-all: lang-python --&gt;

Many experienced developers recommend against using [Django multi-table inheritance][mti] because of its poor performance:

1. [Django gotcha: concrete inheritance][gotcha] by [Jacob Kaplan-Moss][moss], a core contributor of Django.

  &gt; In nearly every case, abstract inheritance is a better approach for
  &gt; the long term. I’ve seen more than few sites crushed under the load
  &gt; introduced by concrete inheritance, so I’d strongly suggest that
  &gt; Django users approach any use of concrete inheritance with a large
  &gt; dose of skepticism.

2. [Two Scoops of Django][scoops] by [Daniel Greenfield][pydanny] ([@pydanny])

  &gt; Multi-table inheritance, sometimes called “concrete inheritance,” is
  &gt; considered by the authors and many other developers to be a bad thing.
  &gt; We strongly recommend against using it.

  &gt; At all costs, everyone should avoid multi-table inheritance
  &gt; since it adds both confusion and substantial overhead.
  &gt; Instead of multi-table inheritance, use explicit OneToOneFields and
  &gt; ForeignKeys between models so you can control when joins are
  &gt; traversed.

But without multi-table inheritance, I can&#39;t easily

1. [Reference base model in another model][1] (have to use GenericForeignKey or reverse dependency);

2. [Get all instances of base model][2].

   *(feel free to add more)*


So what is wrong with this kind of inheritance in Django? Why are explicit OneToOneFields better?

How much does performance suffer from JOINs? Are there any benchmarks that show the difference in performance?

&lt;s&gt;Does not `select_related()` allow us to control when JOINs are invoked?&lt;/s&gt;


----

I have moved concrete examples to a [separate question][1] since this one is becoming too broad, and added a list of reasons for using multi-table inheritance instead.


[mti]: https://docs.djangoproject.com/en/1.5/topics/db/models/#multi-table-inheritance
[scoops]: http://www.amazon.com/Two-Scoops-Django-Best-Practices/dp/1481879707
[pydanny]: http://pydanny.com/
[@pydanny]: https://stackoverflow.com/users/93270/pydanny
[gotcha]: http://jacobian.org/writing/concrete-inheritance/
[moss]: http://jacobian.org/

[1]: https://stackoverflow.com/questions/23555478/django-onetoonefield-to-multiple-models
[2]: https://stackoverflow.com/questions/1729784/django-get-all-implementations-of-an-abstract-base-class

Should I avoid multi-table (concrete) inheritance in Django by any means?

Can&#39;t install python-dev on centos 6.5. Yum says &quot;No package python-dev available.&quot;. No graphical solutions please.

Can&#39;t install python-dev on centos 6.5

<p>Can't install python-dev on centos 6.5. Yum says "No package python-dev available.". No graphical solutions please.</p>


I&#39;m trying to write a Bash script that will overwrite an existing directory. I have a directory `foo/` and I am trying to overwrite `bar/` with it. But when I do this:

    cp -Rf foo/ bar/

a new `bar/foo/` directory is created. I don&#39;t want that. There are two files in `foo/`; `a` and `b`. There are files with same names in `bar/` as well. I want the `foo/a` and `foo/b` to replace `bar/a` and `bar/b`.


How to force &#39;cp&#39; to overwrite directory instead of creating another one inside?

I am writing a bash script that needs to parse filenames.

It will need to remove all special characters (including space): **&quot;!?.-_** and change all uppercase letters to lowercase.  Something like this:

    Some_randoM data1-A
    More Data0

to:

    somerandomdata1a
    moredata0

I have seen lots of questions to do this in many different programming languages, but not in bash.  Is there a good way to do this?

Remove all special characters and case from string in bash

I have bunch of files sitting in folders like

    data\A\A\A\json1.json
    data\A\A\A\json2.json
    data\A\A\B\json1.json
    ...
    data\Z\Z\Z\json_x.json

I want to cat all the jsons into one single file?


Recursively cat all the files into single file

Let&#39;s suppose I have this variable: 

    DATE=&quot;04\Jun\2014:15:54:26&quot;

Therein I need to replace `\` with `\/` in order to get the string:

    &quot;04\/Jun\/2014:15:54:26&quot;

I tried `tr` as follows:

    echo &quot;04\Jun\2014:15:54:26&quot; | tr  &#39;\&#39; &#39;\\/&#39;

But this results in: `&quot;04\Jun\2014:15:54:26&quot;`. 

It does not satisfy me. Can anyone help?

Replace slash in Bash

I am trying to compile a C++ program like this:

    $ g++ -o Sniffer_Train main.cpp Sniffer_train.cpp Sniffer_train.h -lmysqlclient -lpcap

However I get the following error:

    /usr/bin/ld: /tmp/cct6xeXD.o: undefined reference to symbol
    &#39;pthread_join@@GLIBC_2.4&#39; //lib/arm-linux-gnueabihf/libpthread.so.0:
    error adding symbols: DSO missing from command line
     
    collect2: error: ld returned 1 exit status

I have no idea what this error means. Any help will be greatly appreciated.


DSO missing from command line

I want to start my server through nohup.php but the command is not running and displays following error 
&gt;nohup:ignoring input and appending output to &#39;nohup.out&#39;

I am using ssh through putty, this is what i am doing

&gt;nohup php server1.php

nohup:ignoring input and appending output to &#39;nohup.out&#39;

I am getting the error &quot;No space left on device&quot; when i tried to scp some files to a centos machine, 

tried to check:

    [root@...]# df -h
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/mapper/VolGroup00-LogVol01 18G   18G     0 100% /

And when I do

`du -sh /` -&gt; it gives only 5G

    [... ~]$ df -i /
    Filesystem            Inodes   IUsed   IFree IUse% Mounted on
    /dev/mapper/VolGroup00-LogVol01
                         4685824  209516 4476308    5% /


seems like file system is full.
How can i find which one is taking these much size?

No space left on device

I am using CentOS 7 and I have to ensure that ports 2888 and 3888 are open.

I read [this article](http://wiki.centos.org/HowTos/Network/IPTables) but this did not work because on CentOS 7 OS there is no `iptables save` command.

Someone told me that the above URL is not valid for CentOS 7. and I should follow [this](https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Security_Guide/sec-Using_Firewalls.html). 
But this article is not clear to me on exactly what command I need to execute.

I also found 

    firewall-cmd --zone=public --add-port=2888/tcp 

but this does not survive reboots.

So how can I open the ports and make it survive reboots?

Open firewall port on CentOS 7

I installed CentOS 7 with minimal configuration (os + dev tools). I am trying to open 80 port for `httpd` service, but something wrong with my iptables service ... what&#39;s wrong with it? What am I doing wrong? 


    # ifconfig/sbin/service iptables save
    bash: ifconfig/sbin/service: No such file or directory


    # /sbin/service iptables save
    The service command supports only basic LSB actions (start, stop, restart, try-restart, reload, force-reload, status). For other actions, please try to use systemctl.

    # sudo service iptables status
    Redirecting to /bin/systemctl status  iptables.service
    iptables.service
       Loaded: not-found (Reason: No such file or directory)
       Active: inactive (dead)
    
    # /sbin/service iptables save
    The service command supports only basic LSB actions (start, stop, restart, try-restart, reload, force-reload, status). For other actions, please try to use systemctl.
    
    # sudo service iptables start
    Redirecting to /bin/systemctl start  iptables.service
    Failed to issue method call: Unit iptables.service failed to load: No such file or directory.



How can I use iptables on centos 7?

git 1.7.1

`git show &lt;hash&gt;:&lt;file&gt;` gives me the file based on the commit hash provided

I am trying to figure out how to bet the file of the previous commit before the one who&#39;s hash I have.

I know I can always use the `log` to get all hashes and figure out the one i need but that&#39;s not a good solution in my case as I am trying to minimise the number of commands I need to do for performance issues.

Was wondering if there is a simple way.

GIT get the commit hash prior to a specific commit

I&#39;m trying to install pycurl via:

    sudo pip install pycurl

It downloaded fine, but when when it runs setup.py I get the following traceback:

    Downloading/unpacking pycurl
      Running setup.py egg_info for package pycurl
        Traceback (most recent call last):
          File &quot;&lt;string&gt;&quot;, line 16, in &lt;module&gt;
          File &quot;/tmp/pip-build-root/pycurl/setup.py&quot;, line 563, in &lt;module&gt;
            ext = get_extension()
          File &quot;/tmp/pip-build-root/pycurl/setup.py&quot;, line 368, in get_extension
            ext_config = ExtensionConfiguration()
          File &quot;/tmp/pip-build-root/pycurl/setup.py&quot;, line 65, in __init__
            self.configure()
          File &quot;/tmp/pip-build-root/pycurl/setup.py&quot;, line 100, in configure_unix
            raise ConfigurationError(msg)
        __main__.ConfigurationError: Could not run curl-config: [Errno 2] No such file or directory
        Complete output from command python setup.py egg_info:
        Traceback (most recent call last):
    
      File &quot;&lt;string&gt;&quot;, line 16, in &lt;module&gt;
    
      File &quot;/tmp/pip-build-root/pycurl/setup.py&quot;, line 563, in &lt;module&gt;
    
        ext = get_extension()
    
      File &quot;/tmp/pip-build-root/pycurl/setup.py&quot;, line 368, in get_extension
    
        ext_config = ExtensionConfiguration()
    
      File &quot;/tmp/pip-build-root/pycurl/setup.py&quot;, line 65, in __init__
    
        self.configure()
    
      File &quot;/tmp/pip-build-root/pycurl/setup.py&quot;, line 100, in configure_unix
    
        raise ConfigurationError(msg)
    
    __main__.ConfigurationError: Could not run curl-config: [Errno 2] No such file or directory

Any idea why this is happening and how to get around it 

&quot;Could not run curl-config: [Errno 2] No such file or directory&quot; when installing pycurl

We are moving our package management from manually updating files to NuGet. I am trying to install older versions of packages to match the one we already have in source control. There is no way to do this from the UI so I use the command line to get the proper version.

For some reason, `Install-Package` keeps on telling me that the nuget gallery is unreachable.

&gt; The source at nuget.org [https://www.nuget.org/api/v2/] is unreachable. Falling back to NuGet Local Cache

This happens only in one of our solutions. If I create a new solution or use another one in the same repository, packages will install as expected. I can even install the packages in a dummy solution to fill the local cache and then install them successfully in the faulty solution. I have tried to `Invoke-WebRequest` on the url from the NuGet Console and I get an HTTP 200.

What can cause this? Is there a way to override the package sources on a per solution/project basis?

Source unreachable when using the NuGet Package Manager Console

I&#39;ve been usually installed python packages through pip.

For Google App Engine, I need to install packages to another target directory.

I&#39;ve tried:

&gt; pip install -I flask-restful --target ./lib

but it fails with:

&gt; must supply either home or prefix/exec-prefix -- not both

How can I get this to work?

DistutilsOptionError: must supply either home or prefix/exec-prefix -- not both

Editors note:  This question was asked in 2014, and the answers may be outdated.

---

I want to do some programming with the latest JavaFX, which requires Java 8. I&#39;m using IntelliJ 13 CE and Mac OS X 9 Mavericks. I ran Oracle&#39;s Java 8 installer, and the files look like they ended up at 

    /Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk

but previous versions are at 

    /System/Library/Java/JavaFrameworks/jdk1.6....

Not sure why the latest installer puts this in `/Library` instead of `/System/Library` (nor what the difference is). But `/usr/libexec/java_home` doesn&#39;t find 1.8, so all the posts I&#39;ve found on how to set your current java version don&#39;t work. I&#39;ve tried adding a symbolic link to make it look like 1.8 is in the `/System/Library...` path, but it doesn&#39;t help. `/usr/libexec/java_home -V` still only lists the old Java 1.6.

Ironically, the &quot;Java&quot; control panel under System Preferences shows only Java 1.8!

Why doesn&#39;t Oracle&#39;s installer put it where it really goes? And how can I work around this problem?

How to install Java 8 on Mac

I am having problems with installing `lxml`. I have tried the solutions of the relative questions in this site and other sites but could not fix the problem. Need some suggestions/solution on this.

I am providing the full log after executing `pip install lxml`, 

    Downloading/unpacking lxml
      Downloading lxml-3.3.5.tar.gz (3.5MB): 3.5MB downloaded
      Running setup.py (path:/tmp/pip_build_root/lxml/setup.py) egg_info for package lxml
        /usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: &#39;bugtrack_url&#39;
          warnings.warn(msg)
        Building lxml version 3.3.5.
        Building without Cython.
        Using build configuration of libxslt 1.1.28
        
        warning: no previously-included files found matching &#39;*.py&#39;
    Installing collected packages: lxml
      Running setup.py install for lxml
        /usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: &#39;bugtrack_url&#39;
          warnings.warn(msg)
        Building lxml version 3.3.5.
        Building without Cython.
        Using build configuration of libxslt 1.1.28
        building &#39;lxml.etree&#39; extension
        x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/libxml2 -I/tmp/pip_build_root/lxml/src/lxml/includes -I/usr/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.linux-x86_64-2.7/src/lxml/lxml.etree.o -w
        x86_64-linux-gnu-gcc: internal compiler error: Killed (program cc1)
        Please submit a full bug report,
        with preprocessed source if appropriate.
        See &lt;file:///usr/share/doc/gcc-4.8/README.Bugs&gt; for instructions.
        error: command &#39;x86_64-linux-gnu-gcc&#39; failed with exit status 4
        Complete output from command /usr/bin/python -c &quot;import setuptools, tokenize;__file__=&#39;/tmp/pip_build_root/lxml/setup.py&#39;;exec(compile(getattr(tokenize, &#39;open&#39;, open)(__file__).read().replace(&#39;\r\n&#39;, &#39;\n&#39;), __file__, &#39;exec&#39;))&quot; install --record /tmp/pip-KUq9VD-record/install-record.txt --single-version-externally-managed --compile:
        /usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: &#39;bugtrack_url&#39;
    
      warnings.warn(msg)
    
    Building lxml version 3.3.5.
    
    Building without Cython.
    
    Using build configuration of libxslt 1.1.28
    
    running install
    
    running build
    
    running build_py
    
    creating build
    
    creating build/lib.linux-x86_64-2.7
    
    creating build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/pyclasslookup.py -&gt; build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/doctestcompare.py -&gt; build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/builder.py -&gt; build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/cssselect.py -&gt; build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/sax.py -&gt; build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/_elementpath.py -&gt; build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/ElementInclude.py -&gt; build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/__init__.py -&gt; build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/usedoctest.py -&gt; build/lib.linux-x86_64-2.7/lxml
    
    creating build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/__init__.py -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    creating build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/html5parser.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/ElementSoup.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/builder.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/clean.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/_diffcommand.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/diff.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/_html5builder.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/_setmixin.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/defs.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/formfill.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/soupparser.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/__init__.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    copying src/lxml/html/usedoctest.py -&gt; build/lib.linux-x86_64-2.7/lxml/html
    
    creating build/lib.linux-x86_64-2.7/lxml/isoschematron
    
    copying src/lxml/isoschematron/__init__.py -&gt; build/lib.linux-x86_64-2.7/lxml/isoschematron
    
    copying src/lxml/lxml.etree.h -&gt; build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/lxml.etree_api.h -&gt; build/lib.linux-x86_64-2.7/lxml
    
    copying src/lxml/includes/config.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/xpath.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/tree.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/dtdvalid.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/xmlparser.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/etreepublic.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/xslt.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/schematron.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/uri.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/c14n.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/xinclude.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/xmlschema.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/xmlerror.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/relaxng.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/htmlparser.pxd -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/etree_defs.h -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    copying src/lxml/includes/lxml-version.h -&gt; build/lib.linux-x86_64-2.7/lxml/includes
    
    creating build/lib.linux-x86_64-2.7/lxml/isoschematron/resources
    
    creating build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/rng
    
    copying src/lxml/isoschematron/resources/rng/iso-schematron.rng -&gt; build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/rng
    
    creating build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl
    
    copying src/lxml/isoschematron/resources/xsl/RNG2Schtrn.xsl -&gt; build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl
    
    copying src/lxml/isoschematron/resources/xsl/XSD2Schtrn.xsl -&gt; build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl
    
    creating build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
    
    copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_skeleton_for_xslt1.xsl -&gt; build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
    
    copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_dsdl_include.xsl -&gt; build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
    
    copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_message.xsl -&gt; build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
    
    copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_svrl_for_xslt1.xsl -&gt; build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
    
    copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_abstract_expand.xsl -&gt; build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
    
    copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/readme.txt -&gt; build/lib.linux-x86_64-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
    
    running build_ext
    
    building &#39;lxml.etree&#39; extension
    
    creating build/temp.linux-x86_64-2.7
    
    creating build/temp.linux-x86_64-2.7/src
    
    creating build/temp.linux-x86_64-2.7/src/lxml
    
    x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/libxml2 -I/tmp/pip_build_root/lxml/src/lxml/includes -I/usr/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.linux-x86_64-2.7/src/lxml/lxml.etree.o -w
    
    x86_64-linux-gnu-gcc: internal compiler error: Killed (program cc1)
    
    Please submit a full bug report,
    
    with preprocessed source if appropriate.
    
    See &lt;file:///usr/share/doc/gcc-4.8/README.Bugs&gt; for instructions.
    
    error: command &#39;x86_64-linux-gnu-gcc&#39; failed with exit status 4
    
    ----------------------------------------
    Cleaning up...
    Command /usr/bin/python -c &quot;import setuptools, tokenize;__file__=&#39;/tmp/pip_build_root/lxml/setup.py&#39;;exec(compile(getattr(tokenize, &#39;open&#39;, open)(__file__).read().replace(&#39;\r\n&#39;, &#39;\n&#39;), __file__, &#39;exec&#39;))&quot; install --record /tmp/pip-KUq9VD-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_root/lxml
    Storing debug log for failure in /root/.pip/pip.log


Also, the `pip.log` file looks like this,

    status = self.run(options, args)
      File &quot;/usr/lib/python2.7/dist-packages/pip/commands/install.py&quot;, line 283, in run
        requirement_set.install(install_options, global_options, root=options.root_path)
      File &quot;/usr/lib/python2.7/dist-packages/pip/req.py&quot;, line 1435, in install
        requirement.install(install_options, global_options, *args, **kwargs)
      File &quot;/usr/lib/python2.7/dist-packages/pip/req.py&quot;, line 706, in install
        cwd=self.source_dir, filter_stdout=self._filter_install, show_stdout=False)
      File &quot;/usr/lib/python2.7/dist-packages/pip/util.py&quot;, line 697, in call_subprocess
        % (command_desc, proc.returncode, cwd))
    InstallationError: Command /usr/bin/python -c &quot;import setuptools, tokenize;__file__=&#39;/tmp/pip_build_root/lxml/setup.py&#39;;exec(compile(getattr(tokenize, &#39;open&#39;, open)(__file__).read().replace(&#39;\r\n&#39;, &#39;\n&#39;), __file__, &#39;exec&#39;))&quot; install --record /tmp/pip-KUq9VD-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_root/lxml


`dmesg | tail` command shows output like this,

    [1744367.676147] Out of memory: Kill process 25518 (cc1) score 388 or sacrifice child
    [1744367.676665] Killed process 25518 (cc1) total-vm:242352kB, anon-rss:200608kB, file-rss:0kB

It&#39;s seems like a memory issue. I am taking reference form [this question][1]


  [1]: https://stackoverflow.com/questions/16149613/installing-lxml-with-pip-in-virtualenv-ubuntu-12-10-error-command-gcc-failed

lxml installation error ubuntu 14.04 (internal compiler error)

I&#39;m trying to update Orion ContextBroker using the command yum install contextBroker. Unfortunatelly I get the following error: 

&gt; Loaded plugins: fastestmirror, refresh-packagekit, security Loading
&gt; 
&gt; mirror speeds from cached hostfile
&gt;
&gt; Error: Cannot retrieve metalink for repository: epel. Please verify
&gt; its path and try again

What could be going wrong ?





yum error &quot;Cannot retrieve metalink for repository: epel. Please verify its path and try again&quot; updating ContextBroker

I&#39;ve seen the writeup on using yum to install the dependencies, and then installing Node.JS &amp; NPM from source.  While this does work, I feel like Node.JS and NPM should both be in a public repo somewhere.

How can I install Node.JS and NPM in one command on AWS Amazon Linux?

How to yum install Node.JS on Amazon Linux

I installed MariaDB on CentOS 7 but I had some problems with some configuration, now it is completely misconfigured. 

Thus, I wanted to remove the MariaDB with “yum remove mariadb mariadb-server”, after that I reinstalled it with “yum install mariadb mariadb-server”.

Unfortunately, the configuration remains. It seems as if yum remove don’t delete all MariaDB Config-Files.

How can I remove MariaDB completely from CentOS 7?


Completely remove MariaDB or MySQL from CentOS 7 or RHEL 7

I am using CentOS 7.2

When I use `yum groupinstall &quot;Development Tools&quot;`, gcc version is 4.8.5, like this:   
   
[![enter image description here][1]][1]   

I would like to install gcc 5.3

How to approach this with `yum`?


  [1]: http://i.stack.imgur.com/AdvlD.png

How to Install gcc 5.3 with yum on CentOS 7.2?

Is it possible to use RPM or YUM or any other package manager in Linux, specifically CentOS, to install a package either already downloaded or from repo to a custom location without admin/root access?

I tried building from sources, using cmake, configure, make, make install etc, but, it ended up having so many dependencies one after other.

Or are there any better alternatives?

Content Type	Original Author	Original Content on Stackoverflow
Question	user3616331	View Question on Stackoverflow
Solution 1 - Linux	Ethan Hohensee	View Answer on Stackoverflow
Solution 2 - Linux	Max	View Answer on Stackoverflow
Solution 3 - Linux	Vishal Deka	View Answer on Stackoverflow

Can't install python-dev on centos 6.5

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