Sometimes you have an executable which does not fork to the background, but you need to control it with init scripts, so that it does indeed run in the background. Here's a pretty generic init script for that. It allows you to configure these:

DAEMON_NAME="My Little Daemon"
DAEMON_EXECUTABLE="/opt …

HP seems to have set up a package repository for Ubuntu 12.04, which is an improvement since I last checked a few years ago. To use the repo, add the following line to /etc/apt/sources.list:

deb http://downloads.linux.hp.com/downloads/ManagementComponentPack/ubuntu precise current/non-free …

To get a virtual serial console, you need to enable the iLO virtual serial port. I had mine set up like this:

• iLO 2 Virtual Serial Port: COM2 0x2F8 IRQ 3

I also enabled ssh access in the iLO web interface. This way I can ssh into the iLO and …

I downloaded the firmware from HP site. It was named CP019022.scexe. I tried uploading it in the iLO2 web interface, but it was rejected. Next, I copied it to the server, gave it execute permissions and ran it:

root@host:~# ./CP019022.scexe
./CP019022.scexe: 153: ./CP019022.scexe: pushd: not …

First, make sure you can use public key authentication or similar means to connect to ssh servers without typing in your password all the time.

Install sshfs for mounting remote filesystems over ssh, and afuse for automounting FUSE filesystems (sshfs uses fuse).

sudo apt-get install sshfs afuse

For dead connection …

In this article, I will discuss sending messages from server to web browser using RabbitMQ-Web-Stomp as the backend, and a simple JavaScript library to handle the web browser side. SockJS is used as the browser WebSockets library. This setup enables you to directly push messages in realtime from the RabbitMQ …

Ingenious, fast way to find your files:

Command-T - Fast file navigation for VIM : vim online.

I use the following mappings:

" Set leader key to comma
let mapleader = ","

" Command-T shortcuts
nnoremap <silent> <Leader>t :CommandT<CR>
nnoremap <silent> <Leader>b :CommandTBuffer<CR>

Bring up the finder with ,t or "comma-t". Use …

To temporarily disable all triggers in a PostgreSQL session, use this:

SET session_replication_role = replica;

That disables all triggers for the current database session only. Useful for bulk operations, but remember to be careful to keep your database consistent.

To re-enable:

SET session_replication_role = DEFAULT;

Update 2015-06-16:Ubuntu 14.04 Active Directory Authentication

Authenticating Linux users against Active Directory has traditionally been hard. There's a multitude of HOWTOs on how to do it, and every one of them seems to do it a bit differently. This is because environments and goals vary, and there are …

This query sums total disk space used by the table including indexes and toasted data for the 20 largest tables:

SELECT nspname || '.' || relname AS "relation",
    pg_size_pretty(pg_total_relation_size(C.oid)) AS "total_size"
  FROM pg_class C
  LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
  WHERE nspname NOT IN ('pg_catalog', 'information_schema')
    AND …