I installed ELK on my server, but I do not know used some documentation commands

I installed ELK on my server, but I do not know used some documentation commands.

I installed ELK 7.1 on Ubuntu 18.04 :

$   wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add - $   echo "deb https://artifacts.elastic.co/packages/7.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-7.x.list 

In the documentation there are commands to generate the SSL certificate. But it does not work for Ubuntu 18.04 :


bin/elasticsearch-certutil cert -out config/elastic-certificates.p12 -pass "" 

What is the equivalent for my installation ?

Is the field template documentation wrong?

The core themes Stack and Bootstrap have this documentation in the field.twig.html template:

 * Instead of overriding the theming for all fields, you can also just override  * theming for a subset of fields using  * @link themeable Theme hook suggestions. @endlink For example,  * here are some theme hook suggestions that can be used for a field_foo field  * on an article node type:  * - field--node--field-foo--article.html.twig  * - field--node--field-foo.html.twig  * - field--node--article.html.twig  * - field--field-foo.html.twig  * - field--text-with-summary.html.twig  * - field.html.twig 

However, I am finding that only these work out of the box…

* - field--field-foo.html.twig * - field.html.twig 

Does the documentation need fixing, or am I missing something? Are preprocess functions needed to get the others to work?

Cant find much documentation regarding over committing of memory for VM’s on a KVM host

Most operating systems do not use 100% of the available RAM all the time, having said that I am unable to find an approximation for this over provisioning. CPU cores is not a constraint for me,

I have a 64 GB KVM host, I would like to provision multiple 8GB machines, the machines remain under utilized for most of the time but always in running state, I would like to know the maximum acceptable number of VM’s that can be provisioned on this setup, without hitting any bottlenecks. The underlying storage is hard disk drives, with no SSD so there is little room for swap memory as it may impact performance

Where can I find more detailed documentation about the secp256k1 lib?

I’m basically reading the header file’s comments and some of the code.

In particular, I’m interested in more explanations about the tweak options for addition and multiplication, and their applications to both private and public keys.

I’ll pick an example from secp256k1.c file in source:

int secp256k1_ec_privkey_tweak_add(const secp256k1_context* ctx, unsigned char *seckey, const unsigned char *tweak) { secp256k1_scalar term; secp256k1_scalar sec; int ret = 0; int overflow = 0; VERIFY_CHECK(ctx != NULL); ARG_CHECK(seckey != NULL); ARG_CHECK(tweak != NULL);  secp256k1_scalar_set_b32(&term, tweak, &overflow); secp256k1_scalar_set_b32(&sec, seckey, NULL);  ret = !overflow && secp256k1_eckey_privkey_tweak_add(&sec, &term); memset(seckey, 0, 32); if (ret) {     secp256k1_scalar_get_b32(seckey, &sec); }  secp256k1_scalar_clear(&sec); secp256k1_scalar_clear(&term); return ret; 


And the functions secp256k1_scalar_set_b32() and secp256k1_scalar_get_b32() appear to be related to the partitioning of the 32 bytes of the scalar in into either 4×64 bits, or 8×32 bits (or something else) to do group operations. Just looking at the code is not very clear to me.

In the comments to secp256k1_context_randomize() it is said, quote “secp256k1 code is written to be constant-time no matter what secret”. So, in broad strokes, are the tweaks a way to bypass the overall construction that makes the whole implementation constant-time (due to side-channel leakage prevention)?

I’d appreciate pointing to references in the literature as well.

Documentation of status of technical projects in SharePoint 2013?

A company has a lot of projects (partly product development projects, partly infrastructure projects and “miscellaneous” other projects), where very often different departments are involved.

How can SharePoint (2013) be used to document and show the current status and last actions of each project and to collect information about those projects?

For example:

  • list of all projects
  • show responsible persons in the different departments
  • show project status (phase and % of completion)
  • link to important documents
  • place for notes (maybe like a “blog” with “atomic” entries) about the project progress and decisions
  • project calendar with important milesones, dates, etc.

I assume there are plugins, but maybe you can also recommend some “best practice” descriptions for such solutions?

Note: The company does currently NOT use Microsoft Project for project management.

Where is the `Drush` command specific documentation?

To be more specific than the title, I want to know what drush cim exactly does, like:

  • where is the drush cim command specific documentation?
  • Does cim command remove the files after they are imported, or not?
  • where are the setting files imported from, can you provide me with a path relative to the root (I mean, relative to where the main index.php file of drupal is)?
  • can we change the import path?
  • can we tell drush to just delete any (previously exported) setting files ?