Linux

To force usage of a specific key, put in your ~/.ssh/config file :

Host [HOST_NAME]

   Hostname [HOST_NAME]

   User [USER_NAME]

   Port [PORT]

   IdentityFile ~/.ssh/[your_private_key]

The apache benchmark tool is very basic, and while it will give you a solid idea of some performance.

Some parameters:

To create a bootable USB memory on linux you have several solutions. The famous dd is the most powerful solution, but use carefully. Because a very small error may destroy all your data.

Print / Check Date from command line

date

Set date from the command line

date +%Y%m%d -s "20170430"

Set time from the command line

date +%T -s "12:00:00"

The linux shell/bash terminal default behaviour is print output to the terminal (StdOut : Standard output). But sometimes we need to change this behaviour like save toi a file, display noting ... Here some exaple of user case.

Run cron by drush

drush cron

Add cron hook to a custom module.

/**

 * Implement hook_cron()

 */

function MYMODULE_cron() {

  // Your codes.

}

Method 1:

Static cache Control by .htacces

If not already done, you must enable apache headers (mod_headers.c) module

Check module is enabled or not:

ls /etc/apache2/mods-enabled/

An email is classified as spam or not spam on the receiving end, not the sending end. But you can improve

Prompt for Yes/No/Cancel input in a Linux shell / bash script

Example:

#!/bin/bash

echo "This script will ask a question.";