deepaknverma

One of the biggest challenges I run into working with ESXi hosts is the lack of a real usable CLI. The remote CLI provided by VMware is clunky at best and makes administration a bit of a pain. I did some poking around and managed to find some interesting CLI commands that work for ESXi.

Most of these have no manual page but will output a help message if run by themselves. I would recommend using extreme caution and using a test host to determine the usefulness in your environment before using them on an important system. Also keep in mind that the examples that I give are not the "only" way the commands can be used.

To power on a virtual machine from the command line:

    - Lists all vm's running on hypervisor and provides vmid
    
    vim-cmd vmsvc/getallvms
    

deepaknverma

Doesn't matter how good programmer, system administrator or technologist you are. You always have to refer to online documentation or I say ask GOOGLE to recall
those commands. It pisses me a lot. I created this GIST to refer too, whenever I am stuck.

----------------------------------------------------------------------------------------------
Privileges Management
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$sudo :– run command as root
$sudo -s :– open a root shell
$sudo -i :-similar to sudo su - , gives you roots environment configuration
$sudo -s -u user name              : – open a shell as user

deepaknverma

If you have migrated recently from Windows to Unix like operating system, you will be bit surprised, when you put any CD Rom or Pen Drive in your system, why doesn’t it get detected. So, why doesn’t it get detected? Because it is not mounted. 

As you all know, Linux is working with Files. Device, Drive, Partition everything is File in here. I have told this earlier, working with device is as easy as you write into File and read from it. 

Ubuntu and other latest release are capable to auto mount your drive/device/CD/DVD-ROM when you connect.

There are dedicated drives in Linux File System hierarchy to mount external devices/drives/CD-ROMs. They are /media/ and /mnt/ drives. So to mount into any of these two drives, just do,

#mount <what_to_mount> <where_to_mount>

deepaknverma

--------------------------------------------
Install PHP 5.4.x
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yum install \
php54.x86_64 \
php54-bcmath.x86_64 \
php54-cli.x86_64 \
php54-common.x86_64 \
php54-dba.x86_64 \
php54-devel.x86_64 \

deepaknverma

Please take a look at the original article (http://www.softwareprojects.com/resources/programming/t-optimizing-nginx-and-php-fpm-for-high-traffic-sites-2081.html) as it includes excellent configuration file examples.

1. Switch from TCP to UNIX domain sockets:
When communicating to processes on the same machine UNIX sockets have better performance the TCP because there's less copying and fewer context switches.

2. Adjust Worker Processes:
Set the worker_processes in your nginx.conf file to the number of cores your machine has and  increase the number of worker_connections.

3. Setup upstream load balancing:
Multiple upstream backends on the same machine produce higher throughout than a single one.

deepaknverma

Ubuntu newb running 11.04. Seems like a lot of other people are having trouble mounting the network drive at boot in fstab. Tried a bunch of things and cruising the forums but just ended up being a mess. Finally got it going and I though I would share for others and if I need to do it again later.

Also worth noting is that it is not very secure as the file you save the credentials in is in plain text, but I didn't care at this point.

1. Install smbfs:
   sudo apt-get install smbfs

2. Then create a folder inside of the /media directory to mount the share in:
   sudo mkdir /media/server

deepaknverma

Node.js is a Javascript platform for server-side programming that allows users to build network applications quickly. 

Building nodejs server in ubuntu is fairly simple and easy. With few commands you can make a nodejs server up and running in not time.
Nodejs generally runs of port 3000 but that is not mandatory, you can use any other port you want to make your server more customised.

There are few path, you can follow to get your Nodejs up and running on Ubuntu 14.04

======================
Distro-Stable Version
======================

deepaknverma

$.fn.serializeObject = function(){
  var o = {};
  var a = this.serializeArray();
  $.each(a, function(){
    if(o[this.name] !== undefined) {
      if(!o[this.name].push) {
        o[this.name] = [o[this.name]];
      }
      o[this.name].push(this.value || '');
    } else {

deepaknverma

#!/usr/bin/env sh
 
# checks to see if running 
launchctl list | grep mongo
 
launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist
launchctl remove homebrew.mxcl.mongodb
 
pkill -f mongod
 

deepaknverma

You've a lot unused kernels. Remove all but the last kernels with:
sudo apt-get purge linux-image-{3.0.0-12,2.6.3{1-21,2-25,8-{1[012],8}}}

This is shorthand for:
sudo apt-get purge linux-image-3.0.0-12 linux-image-2.6.31-21 linux-image-2.6.32-25 linux-image-2.6.38-10 linux-image-2.6.38-11 linux-image-2.6.38-12 linux-image-2.6.38-8

Removing the linux-image-x.x.x-x package will also remove linux-image-x.x.x-x-generic.
The headers are installed into /usr/src and are used when building out-tree kernel modules (like the proprietary nvidia driver and virtualbox). Most users should remove these header packages if the matching kernel package (linux-image-*) is not installed.

To list all installed kernels, run: