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1500 questions
79
votes
14 answers
Docker containers can't resolve DNS on Ubuntu 14.04 Desktop Host
I'm running into a problem with my Docker containers on Ubuntu 14.04 LTS.
Docker worked fine for two days, and then suddenly I lost all network connectivity inside my containers. The error output below initially lead me to believe it was because…
Thomas V.
- 2,141
79
votes
7 answers
How to specify hostname for the running container?
I'm having trouble setting the hostname on a running docker container. I'm also having trouble understanding how to specify hostname after the image is started.
I started a container from an image I downloaded:
sudo docker run -p 8080:80 -p 2222:22…
Miguel Ping
- 915
79
votes
6 answers
How to unify package installation tasks in ansible?
I am starting with ansible and will use it, among others, to install packages on several Linux distros.
I see in the docs that the yum and apt commands are separated - what would be the easiest way to unify them and use something like this:
- name:…
WoJ
- 3,657
79
votes
9 answers
Enable HTTP Strict Transport Security (HSTS) in IIS 7
What is the best way to turn on HTTP Strict Transport Security on an IIS 7 web server?
Can I just through the GUI and add the proper HTTP response header or should I be using appcmd and if so what switches?
Bob
- 2,569
- 3
- 26
- 22
79
votes
3 answers
In Bash, are wildcard expansions guaranteed to be in order?
Is the expansion of a wildcard in Bash guaranteed to be in alphabetical order? I am forced to split a large file into 10 Mb pieces so that they can be be accepted by my Mercurial repository.
So I was thinking I could use:
split -b 10485760 Big.file…
Sled
- 937
- 1
- 7
- 11
78
votes
9 answers
What is the debian-sys-maint MySQL user (and more)?
I have been bitten several times by the 'debian-sys-maint' user that is installed by default on the mysql-server packages installed from the Ubuntu repositories.
Generally what happens is I pull a fresh copy of our production database (which is not…
Joe Holloway
- 1,929
78
votes
7 answers
How to check for modified config files on a Debian system?
How to find all Debian managed configuration files which have been changed from the default?
malclocke
- 1,711
- 1
- 12
- 6
78
votes
6 answers
Generating a self-signed cert with openssl that works in Chrome 58
As of Chrome 58 it no longer accepts self-signed certs that rely on Common Name: https://productforums.google.com/forum/#!topic/chrome/zVo3M8CgKzQ;context-place=topicsearchin/chrome/category$3ACanary%7Csort:relevance%7Cspell:false
Instead it…
bcardarella
- 1,737
78
votes
8 answers
How does Windows decide which DNS Server to use when resolving names?
What algorithm does Windows use to decide which DNS Server it will query in order to resolve names?
Let's say I have several interfaces, all active, some with no dns server specified, some told to determine it automatically, and some with it…
Artefacto
- 1,065
78
votes
2 answers
Tried to create 2 record set type=TXT in Route53
I'm trying to add a second TXT record to a domain, but I get the following error:
Tried to create resource record set type='TXT but it already exists
Can I add two records at the same domain?
gpupo
- 1,294
78
votes
11 answers
Where's the conventional place to store git repositories in a linux file system tree?
If I make an analogy with the hosting of a web server, I would say that git's data should be in /var/git, so my git repository would be in /var/git/myrepo
Q: Is that the right guess ?
Samuel Rossille
- 916
78
votes
11 answers
Why is ssh agent forwarding not working?
In my own computer, running MacOSX, I have this in ~/.ssh/config
Host *
ForwardAgent yes
Host b1
ForwardAgent yes
b1 is a virtual machine running Ubuntu 12.04. I ssh to it like this:
ssh pupeno@b1
and I get logged in without being asked for a…
Pablo Fernandez
- 7,498
78
votes
5 answers
How to properly set permissions for NFS folder? Permission denied on mounting end.
I'm trying to connect to an NFS folder on my dev server. The owner of the folder on the dev server is darren and group darren.
When I export and mount it to my Mac using the Disk Utility it mounts, but then when I try to open the folder is says I do…
Darren
- 1,017
78
votes
5 answers
In Linux, what is the difference between "buffers" and "cache" reported by the free command?
This is an old question that I've seen from time to time. My understanding of it is rather limited (having read about the differences a long time ago, but the factoid(s) involved never really stuck).
As I understand it,
Buffers
Are used by…
Avery Payne
- 14,664
78
votes
4 answers
How do I edit git's history to correct an incorrect email address/name
When I started using git I just did a git init and started calling add and commit. Now I am starting to pay attention and I can see that my commits are showing up as cowens@localmachine, rather than the address I want. It appears as if setting…
Chas. Owens
- 2,083