    xclip -sel c &lt; input_file
will copy the contents of `input_file` to clipboard. `xclip` requires installation. To install

    sudo apt install xclip

---

`-sel` stands for `-selection`. `c` is for `clipboard`. Interchangeable.

Capable of much more, I advise reading its man page.

There is also `xsel`. [This answer][1] on Unix SE gives a very thorough answer to this exact question.


[1]: https://unix.stackexchange.com/a/211826/122065

`xclip -selection clipboard -i &lt; fileName`

copies the content of file into clipboard





You can do the following that will directly copy the content of id_rsa.pub to clipboard:

```
pbcopy &lt; ~/.ssh/id_rsa.pub
```

If you&#39;re copying from terminal (like if you use the cat command already posted), highlight the key details and use Ctrl + Shift + C. This should put it on your clipboard. You can also right click and select &#39;copy&#39; from terminal.

You can use:

    cat ~/.ssh/id_rsa.pub

I hope that help you, if not: 

[Set up SSH for Git and Mercurial on Mac OSX/Linux][1]


  [1]: https://web.archive.org/web/20150501142423/https://confluence.atlassian.com/pages/viewpage.action?pageId=270827678

I have a column I_DATE of type string(object) in a dataframe called train as show below.

    I_DATE
    28-03-2012  2:15:00 PM
    28-03-2012  2:17:28 PM
    28-03-2012  2:50:50 PM


How to convert I_DATE  from string to datatime format &amp; specify the format of input string. I saw some answers to this but its not for AM/PM format.

Also, how to filter rows based on a range of dates in pandas?


How to convert string to datetime format in pandas python?

Section 23.3.7 Class `vector&lt;bool&gt;` [vector.bool], paragraph 1 states:

    template &lt;class Allocator&gt; class vector&lt;bool, Allocator&gt; {
    public:
        // types:
        typedef bool              const_reference;
        ...

However this program fails to compile when using libc++:

    #include &lt;vector&gt;
    #include &lt;type_traits&gt;

    int
    main()
    {
        static_assert(std::is_same&lt;std::vector&lt;bool&gt;::const_reference, bool&gt;{}, &quot;?&quot;);
    }

Furthermore I note that the C++ standard has been consistent in this specification all the way back to C++98.  And I further note that libc++ has consistently not followed this specification since the first introduction of libc++.

What is the motivation for this non-conformance?

Why is libc++&#39;s vector&lt;bool&gt;::const_reference not bool?

I&#39;m generating an SSH key but I don&#39;t know how to copy the key from `id_rsa.pub` to the clipboard. I&#39;m using BackBox Linux.

Copy file contents to the clipboard in Linux terminal

<p>I'm generating an SSH key but I don't know how to copy the key from <code>id_rsa.pub</code> to the clipboard. I'm using BackBox Linux.</p>


I want to download an image accessible from this link: `https://www.python.org/static/apple-touch-icon-144x144-precomposed.png` into my local system. Now, I&#39;m aware that the `curl` command can be used to download remote files through the terminal. So, I entered the following in my terminal in order to download the image into my local system:

    curl https://www.python.org/static/apple-touch-icon-144x144-precomposed.png


However, this doesn&#39;t seem to work, so obviously there is some other way to download images from the Internet using `curl`. What is the correct way to download images using this command?

Ubuntu: Using curl to download an image

How can I suppress error messages for a shell command?

For example, if there are only `jpg` files in a directory, running `ls *.zip` gives an error message:

       $ ls *.zip
       ls: cannot access &#39;*.zip&#39;: No such file or directory

Is there an option to suppress such error messages? I want to use this command in a Bash script, but I want to hide all errors.




How can I suppress error messages of a command?

Is there a command that will list all vhosts or servers running under nginx on CentOS? I would like to pipe the results to a text file for reporting purposes.

I&#39;m looking for something similar to this command that I use for Apache:

apachectl -S 2&gt;&amp;1 | grep &#39;port 80&#39;

How can I list all vhosts in nginx

I am already aware of the *real user id*. It is the unique number for a user in the system.

On my system, my `uid` is

    $ echo $UID
    1014
    $

What do the other two IDs stands for?

And what is the use of *effective user id* and *saved user id* and where do we use them in the system?


Difference between Real User ID, Effective User ID and Saved User ID

I am trying to build android for ionic in linux but its showing me an error like this 

         [Error: Failed to find &#39;ANDROID_HOME&#39; environment variable. 
          Try setting setting it manually.
          Failed to find &#39;android&#39; command in your &#39;PATH&#39;. 
          Try update your &#39;PATH&#39; to include path to valid SDK directory.]
          ERROR building one of the platforms: Error: /home/kumar/myapp/platforms/android/cordova/build: Command failed with exit code 2
          You may not have the required environment or OS to build this project
          Error: /home/kumar/myapp/platforms/android/cordova/build: Command failed with exit code 2
    at ChildProcess.whenDone (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/src/cordova/superspawn.js:139:23)
    at ChildProcess.EventEmitter.emit (events.js:98:17)
    at maybeClose (child_process.js:743:16)
    at Process.ChildProcess._handle.onexit (child_process.js:810:5)

and i&#39;ve added this in my bashrc file 

    export ANT_HOME=&quot;/usr/bin/ant&quot;
    export PATH=&quot;$PATH:$ANT_HOME/bin&quot;
    export HOME=&quot;/home/kumar&quot;
    export ANDROID_HOME=&quot;$HOME/android-sdk-linux/tools&quot;
    export ANDROID_PLATFORM_TOOLS=&quot;$HOME/android-sdk-linux/platform-tools&quot;
    export PATH=&quot;$ANDROID_HOME:$ANDROID_PLATFORM_TOOLS:$PATH&quot;

I&#39;m thinking i&#39;ve given the path but i dont know why its showing me this error .. Please help....

Ionic android build Error - Failed to find &#39;ANDROID_HOME&#39; environment variable

I&#39;ve been using github from a relatively short period, and I&#39;ve always used the client to perform commits and pulls. I decided to try it from the git bash yesterday, and I successfully created a new repo and committed files.

Today I did changes to the repository from another computer, I&#39;ve committed the changes and now I&#39;m back home and performed a `git pull` to update my local version and I get this:

    There is no tracking information for the current branch.
        Please specify which branch you want to merge with.
        See git-pull(1) for details
    
        git pull &lt;remote&gt; &lt;branch&gt;
    
    If you wish to set tracking information for this branch you can do so with:
    
        git branch --set-upstream develop origin/&lt;branch&gt;

the only contributor to this repo is me and there are no branches (just a master). I&#39;m on windows and I&#39;ve performed the pull from git bash:

[![enter image description here][1]][1]

git status:

    $ git status
    # On branch master
    nothing to commit, working directory clean

git branch:

    $ git branch
    * master

What am I doing wrong?

 


  [1]: https://i.stack.imgur.com/AeyH8.png

There is no tracking information for the current branch

I have created a new Git repository on Visual Studio online. I have cloned on my computer and I have added it a project. After that, I have created a new branch called develop on Visual Studio online, and I have tried to check it out creating a new local branch but it doesn&#39;t appear on Team Explorer.

This is my Visual Studio online:
[![enter image description here][1]][1]

And this is Visual Studio 2015 Team Explorer:
[![enter image description here][2]][2]

Why develop branch doesn&#39;t appear on Team Explorer?

  [1]: http://i.stack.imgur.com/NV2T2.png
  [2]: http://i.stack.imgur.com/WVdpY.png

Remote branch on Visual Studio online doesn&#39;t appear on Visual Studio 2015 Team Explorer

This isn&#39;t as simple as just doing a parametrized build. I&#39;ve already got a specific build process that will build and deploy whenever any of these branches are pushed to GitHub:

[![enter image description here][1]][1]

So if I&#39;ve just pushed `develop` and it built successfully, how do I trigger a manual build and have it pull `feature/my-new-feature` (without doing a `git push`)? I tried enabling parametrized build, adding a new string called `branch`, and then adding a new branch specifier, `*/$branch`. I then ran a build and set `branch` to `feature/my-new-feature` and it still pulled from `develop`.

I&#39;d appreciate any help!


  [1]: http://i.stack.imgur.com/M4YDd.png

Jenkins - how to build a specific branch

In short;
---------

 - How can I delete remote multiple merged remotes?

More background;
----------------

I have a git repo with tens of remotes which have been merged into master.  I can delete these remotes one at a time by using:

    git push --delete origin myBranch-1234

However this is a slow and tedious process for all remotes.  So I&#39;m trying this command:

    git branch -r --merged | grep origin | grep -v master | xargs git push origin --delete

`git branch -r --merged` lists all merged remotes.&lt;br&gt;
`grep origin` tells the command to include origin.&lt;br&gt;
`grep -v master` tells the command to exclude master.&lt;br&gt;
`xargs git push origin --delete` tells the command to delete the list of remotes.

All together, I expect this to gather all merged remotes and delete them.

When I run the above command, I receive the following for every merged remote;

    error: unable to delete &#39;origin/myBranch-1234&#39;: remote ref does not exist
    error: unable to delete &#39;origin/myBranch-1235&#39;: remote ref does not exist
    error: unable to delete &#39;origin/myBranch-1236&#39;: remote ref does not exist
    error: unable to delete &#39;origin/myBranch-1237&#39;: remote ref does not exist
    ... etc
However these remotes do exist and I can checkout each of them.  Many sites and people recommend that I run `git fetch --prune` to clean up missing references.  This does nothing because all of these remotes exist.

So I ask you, dear stack exchange;
----------------------------------

 - Why can I delete one remote, but not many?
 - Is my command correct?

I think I&#39;m missing something small.  Every time I research this, it seems like I&#39;m doing this correctly, but I&#39;m getting the above errors.

 - [Delete local and Remote Branches][1]
 - [gist Delete Merged Remotes][2]


  [1]: https://stackoverflow.com/questions/2003505/delete-a-git-branch-both-locally-and-remotely
  [2]: https://gist.github.com/schacon/942899

git delete remotes: remote refs do not exist

I&#39;ve just installed Git for Windows 2.5.0 on Windows 7, and it appears that my `.bashrc` file is not being executed when I run Git Bash.

I created the file like so:

	Administrator@HintTech-Dev MINGW64 /
	$ pwd
	/
	
	Administrator@HintTech-Dev MINGW64 /
	$ cd ~
	
	Administrator@HintTech-Dev MINGW64 ~
	$ pwd
	/c/Users/Administrator
	
	Administrator@HintTech-Dev MINGW64 ~
	$ touch .bashrc
	
	Administrator@HintTech-Dev MINGW64 ~
	$ vi .bashrc
	
	[... I insert the line &quot;ZZZTESTVAR=234&quot; (without the quotes) into the file in vim ...]
	
	Administrator@HintTech-Dev MINGW64 ~
	$ exit

Yet, when I next run Git Bash:

	Administrator@HintTech-Dev MINGW64 /
	$ set | grep ZZZ
	
	Administrator@HintTech-Dev MINGW64 /
	$ cat ~/.bashrc
	ZZZTESTVAR=234
	
	Administrator@HintTech-Dev MINGW64 /
	$ ZZZTESTVAR=234
	
	Administrator@HintTech-Dev MINGW64 /
	$ set | grep ZZZ
	ZZZTESTVAR=234
	
	Administrator@HintTech-Dev MINGW64 /
	$

Why isn&#39;t my `.bashrc` being run?  It seems to be in the right place and have the right permissions.

Git for Windows doesn&#39;t execute my .bashrc file

Last week I upgraded my Windows Github to [Github Desktop][1].

It is certainly a lot faster than that last update they made for Github Windows. It also has a nice little visual timeline of commits and maybe I am being dumb, but **the ability to delete local branches seems to be gone**. 

Before it was under “manage branches” (also gone). Any idea?

 

**Update:** 

In [v3.0.5][2] they have added the option to delete local branches from the gear menu.
[![enter image description here][3]][3]


  [1]: https://desktop.github.com/
  [2]: https://desktop.github.com/release-notes/windows/
  [3]: http://i.stack.imgur.com/00qtA.jpg

How do I delete a local branch on Github Desktop?

I have the following code on a `README.md` file on Github, where I am trying to display the hash sign on a header (I am trying to escape it using the `\` symbol) like so:

    ### C\#
    * [Beginning Game Programming with C#](https://www.coursera.org/course/gameprogramming)

However it renders like so:

[![Not good][1]][1]

I obviously want the hash sign to appear on the header, and I also tried to use a double backslash, but it didn&#39;t work. How do I get the pound sign to appear?

**EDIT**: the linked question deals with github links, my question is to do with headers on a `.md` file.


  [1]: http://i.stack.imgur.com/NPhKb.png

How to escape the (hash) # sign in a Github markdown header? (backslash is not working)

I want to publish some programming documentation I have in a public available repository. This documentation has formatted text, some UML diagrams, and a lot of code examples. I think that GitHub or GitLab are good places to publish this.

To publish the UML diagrams, I would like to have some easy way to keep them updated into the repository and visible as images in the wiki. I don&#39;t want to keep the diagrams in my computer (or on the cloud), edit them, generate an image, and then publish it every time.

Is there a way to put the diagrams in the repository (in PlantUML syntax would be ideal), link them in the markdown text, and make the images auto-update every time the diagram is updated?

How to integrate UML diagrams into GitLab or GitHub

I would like to automate ssh login from my Mac. 

It does have a simple solution:

    sshpass -p my_password ssh m_username@hostname

But my problem is installing sshpass on my Mac. 

How to install sshpass on Mac?

Is there a way to ignore the SSH authenticity checking made by Ansible? For example when I&#39;ve just setup a new server I have to answer yes to this question:

    GATHERING FACTS ***************************************************************
    The authenticity of host &#39;xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx)&#39; can&#39;t be established.
    RSA key fingerprint is xx:yy:zz:....
    Are you sure you want to continue connecting (yes/no)?

I know that this is generally a bad idea but I&#39;m incorporating this in a script that first creates a new virtual server at my cloud provider and then automatically calls my ansible playbook to configure it. I want to avoid any human intervention in the middle of the script execution.

How to ignore ansible SSH authenticity checking?

I Generated ssh keys and configured my git and SourceTree. I could git pull and do other operations from Git-bash. 
Note: I have added the following in .bashrc to make it work.

    eval `ssh-agent`
    ssh-add

However, when I try to git pull in SourceTree, I get this.
&gt; git -c diff.mnemonicprefix=false -c core.quotepath=false fetch origin
&gt; Permission denied (publickey,password). fatal: Could not read from
&gt; remote repository.
&gt; 
&gt; Please make sure you have the correct access rights and the repository
&gt; exists.

When I tried to create ssh-key from Putty(windows), it goes further, but waits with this following message!
 
&gt; git -c diff.mnemonicprefix=false -c core.quotepath=false fetch origin
&gt; The server&#39;s host key is not cached in the registry. You have no
&gt; guarantee that the server is the computer you think it is. The
&gt; server&#39;s rsa2 key fingerprint is:
&gt; 
&gt; ssh-rsa 2048 0f:ee:bb:1c:6c:b4:50:0e:54:d6:e9:55:9b:38:45:df If you
&gt; trust this host, enter &quot;y&quot; to add the key to PuTTY&#39;s cache and carry
&gt; on connecting. If you want to carry on connecting just once, without
&gt; adding the key to the cache, enter &quot;n&quot;. If you do not trust this host,
&gt; press Return to abandon the connection.

if I open the terminal in SourceTree(which is git-bash), it asks me for passphrase. So, i suspect my .bashrc is not sourced by SourceTree. Or am I missing something else? 



cannot pull Git remote repository from Sourcetree

I&#39;m attempting to clone a repo from my BitBucket account to my Windows 10 laptop (running GitBash). I&#39;ve completed all of the steps necessary to connect (set up my SSH key, verified by successfully SSHing git@bitbucket.org, etc). However, whenever I attempt to clone a repo, the prompt continually hangs up after confirming that I want to cache Bitbucket&#39;s key.  

    User@Laptop MINGW64 /C/Repos
    $ git clone git@bitbucket.org:mygbid/test.git
    Cloning into &#39;test&#39;...
    The server&#39;s host key is not cached in the registry. You
    have no guarantee that the server is the computer you
    think it is.
    The server&#39;s rsa2 key fingerprint is:
    ssh-rsa 2048 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40
    If you trust this host, enter &quot;y&quot; to add the key to
    PuTTY&#39;s cache and carry on connecting.
    If you want to carry on connecting just once, without
    adding the key to the cache, enter &quot;n&quot;.
    If you do not trust this host, press Return to abandon the
    connection.
    Store key in cache? (y/n) y

No files are cloned, and the result is an empty repo. Trying to initiate a git pull origin master from this repo also asks to cache the key, then hangs with no feedback. Despite not asking for the key to be cached when I do a test SSH, git operations always ask for the key every time before failing.

With no error messages to work with, I&#39;m really at a loss as to what is wrong. I&#39;ve tried multiple repos, including very small ones, with no success at all.

Git clone / pull continually freezing at &quot;Store key in cache?&quot;

I did not have an `.ssh` directory until I ran

`ssh user@foo.com`

This created a .ssh directory with one file `known_hosts`.

It had some text like this in it.

    foo.com,107.180.00.00 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAuJfqSnraBz//Ux4j/hZpLv2eYUxNUgCk+9ClqoSgfcu4vXbWtUGSjo75UVQf+uguOeBnRLppJJ3mt0R5c/PPcawUGWfffk33t+biYcqra9xUcyfiGtO/Icko2L1J0EYTXM/8x8VK6UYFMfad2gltnZRa8Am50oHTXot1Df0RljUBxvh/UhmTJUrODpyrl2xY1OMWjM+S6uYCMNeSQGEpNfsWiCIStRnctMZSxiYJOLTSC4F2GF7B8pYFBn5rSwVHp17WCdO+4BZfwvH3HSSH8IWoyFhki+NlG912SEBJXcryvc0JPfAB9DTB4mRImjgrRT8vz5QeaCDrh8k4/A+U1fff

I thought this might have been a public or private key pulled of my server some how, but it was not.

What is this, and what is it used for?

I&#39;m just trying to learn more about ssh and how it works.  For example in this case I did not setup the private key on the local machine so it prompted for a password as expected.

**Research**

It&#39;s suppose to be a public key for the server according to

https://security.stackexchange.com/questions/20706/what-is-the-difference-between-authorized-key-and-known-host-file-for-ssh

Content Type	Original Author	Original Content on Stackoverflow
Question	Ravi Shankar	View Question on Stackoverflow
Solution 1 - Linux	Haggra	View Answer on Stackoverflow
Solution 2 - Linux	Firoj Siddiki	View Answer on Stackoverflow
Solution 3 - Linux	Yu N.	View Answer on Stackoverflow
Solution 4 - Linux	e_m	View Answer on Stackoverflow
Solution 5 - Linux	william.bonilla	View Answer on Stackoverflow

Copy file contents to the clipboard in Linux terminal

Linux Problem Overview

Linux Solutions

Solution 1 - Linux

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Solution 5 - Linux

Why is libc++'s vector<bool>::const_reference not bool?

How to convert string to datetime format in pandas python?

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