    df -P file/goes/here | tail -1 | cut -d&#39; &#39; -f 1

I&#39;m a little fuzzy on what the difference between a &quot;group&quot; and a &quot;capture&quot; are when it comes to .NET&#39;s regular expression language.  Consider the following C# code:

    MatchCollection matches = Regex.Matches(&quot;{Q}&quot;, @&quot;^\{([A-Z])\}$&quot;);

I expect this to result in a single capture for the letter &#39;Q&#39;, but if I print the properties of the returned `MatchCollection`, I see:

    matches.Count: 1
    matches[0].Value: {Q}
    matches[0].Captures.Count: 1
    matches[0].Captures[0].Value: {Q}
    matches[0].Groups.Count: 2
    matches[0].Groups[0].Value: {Q}
    matches[0].Groups[0].Captures.Count: 1
    matches[0].Groups[0].Captures[0].Value: {Q}
    matches[0].Groups[1].Value: Q
    matches[0].Groups[1].Captures.Count: 1
    matches[0].Groups[1].Captures[0].Value: Q

What exactly is going on here?  I understand that there&#39;s also a capture for the entire match, but how do the groups come in?  And why doesn&#39;t `matches[0].Captures` include the capture for the letter &#39;Q&#39;?

What&#39;s the difference between &quot;groups&quot; and &quot;captures&quot; in .NET regular expressions?

Seems like my project is getting bigger and bigger with every git `commit/push`. Is there a way to clean up my git folder?

Is there a way to reduce the size of the git folder?

Is there a Linux command to easily find out which partition/mount a directory or file is on? 


(This is probably a RTM question, and I feel guilty for asking it, but somehow, I can&#39;t find a good answer on google just yet..)

How to find out mount/partition a directory or file is on? (Linux Server)

<p>Is there a Linux command to easily find out which partition/mount a directory or file is on?</p>
<p>(This is probably a RTM question, and I feel guilty for asking it, but somehow, I can't find a good answer on google just yet..)</p>


I&#39;m trying to write a post-commit hook for SVN, which is hosted on our development server.  My goal is to try to automatically checkout a copy of the committed project to the directory where it is hosted on the server.  However I need to be able to read only the last directory in the directory string passed to the script in order to checkout to the same sub-directory where our projects are hosted.

For example if I make an SVN commit to the project &quot;example&quot;, my script gets &quot;/usr/local/svn/repos/example&quot; as its first argument.  I need to get just &quot;example&quot; off the end of the string and then concat it with another string so I can checkout to &quot;/server/root/example&quot; and see the changes live immediately. 

Get last dirname/filename in a file path argument in Bash

I know that we can use several commands to access and read memory: for example, print, p, x...

But how can I change the contents of memory at any specific location (while debugging in GDB)? 

How to modify memory contents using GDB?

I want to be able to run a command from my machine using ssh and pass through the environment variable `$BUILD_NUMBER`


Here&#39;s what I&#39;m trying:

    ssh pvt@192.168.1.133 &#39;~/tools/myScript.pl $BUILD_NUMBER&#39;


`$BUILD_NUMBER` is set on the machine making the ssh call and since the variable doesn&#39;t exist on the remote host, it doesn&#39;t get picked up.

How do I pass the value of `$BUILD_NUMBER` ?

Passing variables in remote ssh command

I&#39;m fairly new to Linux (Ubuntu 10.04) and a total novice to assembler. I was following some tutorials and I couldn&#39;t find anything specific to Linux.
So, my question is, what is a good package to compile/run assembler and what are the command line commands to compile/run for that package?


Compile/run assembler in Linux?

How can I send an HTML email using a shell script?

Sending HTML mail using a shell script

How do I read every line of a file in Python and store each line as an element in a list? 

I want to read the file line by line and append each line to the end of the list.

How to read a file line-by-line into a list?

I&#39;m trying to find a nice way to read a log file in real time using python.  I&#39;d like to process lines from a log file one at a time as it is written.  Somehow I need to keep trying to read the file until it is created and then continue to process lines until I terminate the process.  Is there an appropriate way to do this? Thanks.

Read from a log file as it&#39;s being written using python

Is there an in-built function in Ruby to read the whole file without using any loop? So far, I have only come across methods that read in chunks (line or character).

How to read whole file in Ruby?

I have a text file which contains a time stamp on each line. My goal is to find the time range. All the times are in order so the first line will be the earliest time and the last line will be the latest time. I only need the very first and very last line. What would be the most efficient way to get these lines in python?

Note: These files are relatively large in length, about 1-2 million lines each and I have to do this for several hundred files. 

What is the most efficient way to get first and last line of a text file?

I want get a list of filenames with a search pattern with a wildcard. Like:

    getFilenames.py c:\PathToFolder\*
    getFilenames.py c:\PathToFolder\FileType*.txt
    getFilenames.py c:\PathToFolder\FileTypeA.txt

How can I do this?

Search for a file using a wildcard

I want to get the current file&#39;s directory path.
I tried:

    &gt;&gt;&gt; os.path.abspath(__file__)
    &#39;C:\\python27\\test.py&#39;

But how can I retrieve the directory&#39;s path?

For example:

    &#39;C:\\python27\\&#39;


How do I get the full path of the current file&#39;s directory?

Can I use `dir` command-line to get a list of sub-folders and their files, ordered by folder-names, and not just file-names ?


using

&gt; dir /s/b/o:gn &gt; f.txt

I first get all sub-folders and only then all sub files, e.g.:

     d:\root0\root1\folderA
     d:\root0\root1\folderB
     d:\root0\root1\file00.txt
     d:\root0\root1\file01.txt
     d:\root0\root1\folderA\fileA00.txt
     d:\root0\root1\folderA\fileA01.txt
     d:\root0\root1\folderB\fileB00.txt
     d:\root0\root1\folderB\fileB01.txt

But I want to get -

    d:\root0\root1\file00.txt
    d:\root0\root1\file01.txt
    d:\root0\root1\folderA
    d:\root0\root1\folderA\fileA00.txt
    d:\root0\root1\folderA\fileA01.txt
    d:\root0\root1\folderB
    d:\root0\root1\folderB\fileB00.txt
    d:\root0\root1\folderB\fileB01.txt

[&quot;file00.txt&quot; and &quot;file01.txt&quot; can also be at the end of the list]

Thanks,

Atara


How to get a list of sub-folders and their files, ordered by folder-names

How to config nltk data directory from code?

How do I create Directory/folder?

Once I have tested `System.getProperty(&quot;user.home&quot;);`

I have to create a directory (directory name &quot;new folder&quot; ) if and only if new folder does not exist.

How to create a directory in Java?

In bash I need to do this:

1. take all files in a directory 

2. copy them into an existing directory

How do I do this? I tried `cp -r t1 t2` (both t1 and t2 are existing directories, t1 has files in it) but it created a directory called t1 inside t2, I don&#39;t want that, I need the files in t1 to go directly inside t2. How do I do this?

Copy files from one directory into an existing directory

I am using

    mount -o bind /some/directory/here /foo/bar

I want to check `/foo/bar` though with a bash script, and see if its been mounted? If not, then call the above mount command, else do something else. How can I do this?

CentOS is the operating system.

Check if directory mounted with bash

I am having trouble trying to get theh permissions for some of my external drives set up.  

I believe the probem is due to how I am dealing with spaces in the text such that the commands can be interpreted by the terminal.
I have found [this](https://stackoverflow.com/questions/5224243/mount-ntfs-on-ubuntu-on-start-up), which seems to indicate that I need to configure my etc/fstab file to show the following:

    # UNCONFIGURED FSTAB FOR BASE SYSTEM
    /host/ubuntu/disks/swap.disk	none	swap	sw	0	0
    LABEL=&#39;Expansion Drive&#39;  /media/&#39;Expansion Drive&#39;  ntfs-3g  defaults,umask=0022,fmask=0133  0  0
    LABEL=&#39;Expansion Drive_&#39;  /media/&#39;Expansion Drive_&#39;  ntfs-3g  defaults,umask=0022,fmask=0133  0  0

However, This is showing an error that the drive `Drive_&#39;` is not ready.  I realize that this is due to using `&quot;&quot;`s or `&#39;&#39;`s, but I am not sure how else to do this properly.  My 2 drives are called `Expansion Drive` and `Expansion Drive_` .  Anyone know how to solve this problem?

**EDIT:** Here is what I can see in the media folder:


    chasebrown@ubuntu:/media$ ls -al
    total 32
    drwxr-xr-x  6 root       root        1024 Mar  9 16:32 .
    drwxr-xr-x 24 root       root        1024 Feb 23 23:14 ..
    drwx------  1 chasebrown chasebrown  4096 Mar  8 04:21 Expansion Drive
    drwx------  1 chasebrown chasebrown  4096 Mar  8 04:21 Expansion Drive_
    dr-x------  1 chasebrown chasebrown  2048 May 20  2009 GDRV-25922+VR2
    drwx------  1 chasebrown chasebrown 20480 Mar  8 04:21 WD EXTERNAL

Also `sudo lsblk -f`:



    chasebrown@ubuntu:/dev/disk/by-uuid$ sudo lsblk -f
    [sudo] password for chasebrown: 
    NAME   FSTYPE  LABEL           MOUNTPOINT
    sda                            
    ├─sda1 ntfs    System Reserved 
    └─sda2 ntfs                    
    sdb                            
    └─sdb1 ntfs                    /host
    sdc                            
    └─sdc1 ntfs    Expansion Drive /media/Expansion Drive_
    sdd                            
    └─sdd1 ntfs    Expansion Drive /media/Expansion Drive
    sde                            
    └─sde1 ntfs    WD EXTERNAL     /media/WD EXTERNAL
    sr0    iso9660 GDRV-25922+VR2  /media/GDRV-25922+VR2
    loop0  ext3                    /

And `sudo blkid`:

    chasebrown@ubuntu:/dev/disk/by-uuid$ sudo blkid
    /dev/loop0: UUID=&quot;87a15942-982f-4edd-bf44-439dc286fd7c&quot; SEC_TYPE=&quot;ext2&quot; TYPE=&quot;ext3&quot; 
    /dev/sr0: LABEL=&quot;GDRV-25922+VR2&quot; TYPE=&quot;iso9660&quot; 
    /dev/sda1: LABEL=&quot;System Reserved&quot; UUID=&quot;64CEEA61CEEA2B4E&quot; TYPE=&quot;ntfs&quot; 
    /dev/sda2: UUID=&quot;4CA4EBC0A4EBAAA2&quot; TYPE=&quot;ntfs&quot; 
    /dev/sdb1: UUID=&quot;00064EEE064EE46E&quot; TYPE=&quot;ntfs&quot; 
    /dev/sdc1: LABEL=&quot;Expansion Drive&quot; UUID=&quot;C682A8EE82A8E3E1&quot; TYPE=&quot;ntfs&quot; 
    /dev/sdd1: LABEL=&quot;Expansion Drive&quot; UUID=&quot;D006D78406D769CC&quot; TYPE=&quot;ntfs&quot; 
    /dev/sde1: LABEL=&quot;WD EXTERNAL&quot; UUID=&quot;D65AFC375AFC15C9&quot; TYPE=&quot;ntfs&quot; 

Therefore my new fstab file is:

    # UNCONFIGURED FSTAB FOR BASE SYSTEM
    /host/ubuntu/disks/swap.disk	none	swap	sw	0	0
    LABEL=Expansion\040Drive  /media/Expansion\040Drive  ntfs-3g  defaults,umask=0022,fmask=0133  0  0
    LABEL=Expansion\040Drive_  /media/Expansion\040Drive_  ntfs-3g  defaults,umask=0022,fmask=0133  0  0

**SOLUTION**: 
I ended up changing the `LABEL` to `UUID` and it worked for some reason.

Here is the resulting /etc/fstab file was :

    # UNCONFIGURED FSTAB FOR BASE SYSTEM
    /host/ubuntu/disks/swap.disk	none	swap	sw	0	0
    UUID=C682A8EE82A8E3E1  /media/Expansion\040Drive  ntfs-3g  defaults,umask=0022,fmask=0133  0  0
    UUID=D006D78406D769CC  /media/Expansion\040Drive_  ntfs-3g  defaults,umask=0022,fmask=0133  0  0

How do I specify a label/path with spaces in /etc/fstab?

I&#39;m trying to implement the FUSE filesystem.  I am receiving this error:

&gt; cannot access MountDir: Transport endpoint is not connected

This the relevant parts of the program. There are two directories, `MirrorDir` and `MountDir`, that exist withing the same directory as all of the code. I am calling the program like this:

    ./myFS -o nonempty -o allow_other MirrorDir MountDir


Can anyone see what I am doing wrong?

    static struct fuse_operations xmp_oper = {
    	.getattr	= xmp_getattr,
    	.readdir	= xmp_readdir,
    	.open		= xmp_open,
    	.read		= xmp_read,
    };
    
    int main(int argc, char *argv[]) {
    	int fuse_stat;
    	char* mirrorDir;
    
    	mirrorDir = malloc(sizeof(strlen(argv[argc-2]+1)));
    	if (mirrorDir == NULL) {
    		perror(&quot;main calloc&quot;);
    		abort();
    	}
    
    	// Pull the rootdir out of the argument list and save it in my internal data
    	mirrorDir = realpath(argv[argc-2], NULL);
    
        argv[argc-2] = argv[argc-1];
        argv[argc-1] = NULL;
        argc--;
    
    	// turn over control to fuse
    	fprintf(stderr, &quot;about to call fuse_main\n&quot;);	
    	fuse_stat = fuse_main(argc, argv, &amp;xmp_oper, mirrorDir);
    	fprintf(stderr, &quot;fuse_main returned %d\n&quot;, fuse_stat);
    	return fuse_stat;
    }

FUSE error: Transport endpoint is not connected

I am trying to mount a host directory into a Docker container so that any updates done on the host is reflected into the Docker containers.

Where am I doing something wrong. Here is what I did:

    kishore$ cat Dockerfile

    FROM ubuntu:trusty
    RUN apt-get update
    RUN apt-get -y install git curl vim
    CMD [&quot;/bin/bash&quot;]
    WORKDIR /test_container
    VOLUME [&quot;/test_container&quot;]

&lt;/code&gt;&lt;/pre&gt;&lt;pre&gt;&lt;code&gt;kishore$ tree
.
├── Dockerfile
└── main_folder
    ├── tfile1.txt
    ├── tfile2.txt
    ├── tfile3.txt
    └── tfile4.txt

1 directory, 5 files
kishore$ pwd
/Users/kishore/tdock
&lt;/code&gt;&lt;/pre&gt;&lt;pre&gt;&lt;code&gt;kishore$ docker build --tag=k3_s3:latest .

    Uploading context 7.168 kB
    Uploading context
    Step 0 : FROM ubuntu:trusty
     ---&gt; 99ec81b80c55
    Step 1 : RUN apt-get update
     ---&gt; Using cache
     ---&gt; 1c7282005040
    Step 2 : RUN apt-get -y install git curl vim
     ---&gt; Using cache
     ---&gt; aed48634e300
    Step 3 : CMD [&quot;/bin/bash&quot;]
     ---&gt; Running in d081b576878d
     ---&gt; 65db8df48595
    Step 4 : WORKDIR /test_container
     ---&gt; Running in 5b8d2ccd719d
     ---&gt; 250369b30e1f
    Step 5 : VOLUME [&quot;/test_container&quot;]
     ---&gt; Running in 72ca332d9809
     ---&gt; 163deb2b1bc5
    Successfully built 163deb2b1bc5
    Removing intermediate container b8bfcb071441
    Removing intermediate container d081b576878d
    Removing intermediate container 5b8d2ccd719d
    Removing intermediate container 72ca332d9809

kishore$ docker run -d -v /Users/kishore/main_folder:/test_container k3_s3:latest
`c9f9a7e09c54ee1c2cc966f15c963b4af320b5203b8c46689033c1ab8872a0ea`&lt;/code&gt;&lt;/pre&gt;&lt;pre&gt;&lt;code&gt;kishore$ docker run -i -t k3_s3:latest /bin/bash

    root@0f17e2313a46:/test_container# ls -al
    total 8
    drwx------  2 root root 4096 Apr 29 05:15 .
    drwxr-xr-x 66 root root 4096 Apr 29 05:15 ..

root@0f17e2313a46:/test_container# exit
exit&lt;/code&gt;&lt;/pre&gt;&lt;pre&gt;&lt;code&gt;kishore$ docker -v
Docker version 0.9.1, build 867b2a9&lt;/code&gt;&lt;/pre&gt;

+ I don&#39;t know how to check boot2docker version

Questions, issues facing:

1. How do I need to link the main_folder to the test_container folder present inside the docker container?
2. I need to make this automatically. How do I to do that without really using the `run -d -v` command?
3. What happens if the boot2docker crashes? Where are the Docker files stored (apart from Dockerfile)?

How to mount a host directory in a Docker container

I am trying to mount a host directory in Docker, but then I cannot access it from within the container, even if the access permissions look good.

I am doing

    sudo docker run -i -v /data1/Downloads:/Downloads ubuntu bash

and then

    ls -al

It gives me:

    total 8892
    drwxr-xr-x.  23 root root    4096 Jun 18 14:34 .
    drwxr-xr-x.  23 root root    4096 Jun 18 14:34 ..
    -rwxr-xr-x.   1 root root       0 Jun 18 14:34 .dockerenv
    -rwx------.   1 root root 9014486 Jun 17 22:09 .dockerinit
    drwxrwxr-x.  18 1000 1000   12288 Jun 16 11:40 Downloads
    drwxr-xr-x.   2 root root    4096 Jan 29 18:10 bin
    drwxr-xr-x.   2 root root    4096 Apr 19  2012 boot
    drwxr-xr-x.   4 root root     340 Jun 18 14:34 dev
    drwxr-xr-x.  56 root root    4096 Jun 18 14:34 etc
    drwxr-xr-x.   2 root root    4096 Apr 19  2012 home

and a lot more lines like that (I think this is the relevant portion).

If I do

    cd /Downloads
    ls

the result is

    ls: cannot open directory .: Permission denied

The host is Fedora 20, with Docker 1.0.0 and go1.2.2.

What is going wrong?

Content Type	Original Author	Original Content on Stackoverflow
Question	ina	View Question on Stackoverflow
Solution 1 - Linux	Ignacio Vazquez-Abrams	View Answer on Stackoverflow

How to find out mount/partition a directory or file is on? (Linux Server)

Linux Problem Overview

Linux Solutions

Solution 1 - Linux

Is there a way to reduce the size of the git folder?

What's the difference between "groups" and "captures" in .NET regular expressions?

Attributions