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Convert Metric <-> Imperial

Posted 01-03-2014 at 04:14 AM by druuna
Updated 01-31-2014 at 03:24 AM by druuna

Converting from metric to imperial and vice versa using bc.

Here are a few examples in the form of functions:

# -------------------------------------------------------------------------- #
# - Imperial to metric
# -------------------------------------------------------------------------- #

pounds to kilograms

PHP Code:



# Function : lbToKg 
# Syntax   : lbToKg <pounds> 
# 
# Convert pounds to kilogram 
function lbToKg() {

...

druuna

LQ Veteran

Posted in General

Views 3504 Comments 0 druuna is offline

Convert numeral systems (dec <-> bin <-> hex <-> oct)

Posted 12-10-2013 at 03:41 AM by druuna
Updated 01-31-2014 at 03:24 AM by druuna

Tags binary, convert, decimal, hexadecimal, octal

Converting from one numeral system to another can be done using the bc command.

Here are a few examples in the form of functions:

# -------------------------------------------------------------------------- #
# - Decimal to ....
# -------------------------------------------------------------------------- #

Binary

PHP Code:



# Convert decimal to binary 
function decToBin() { 
  echo "obase=2;$1" | bc 
}

Code:

$ decToBin 19
10011

...

druuna

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Date and time functions

Posted 12-09-2013 at 11:34 AM by druuna
Updated 01-31-2014 at 03:25 AM by druuna (Small changes to layout)

Tags date, seconds, time

A handful of date and time related functions that might come in handy.

Convert a date or time string to seconds from epoch

PHP Code:



# ------------------------------------------------------------------ # 
# Function : dateToSecs 
# Syntax   : dateToSecs "[date]" 
# Convert a date or time string to seconds from epoch. 
# ------------------------------------------------------------------ # 
function dateToSecs() { 
  [[ $# -eq 0 ]] && date --utc

...

druuna

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Views 2380 Comments 0 druuna is offline

RHEL local DVD Repo

Posted 04-23-2013 at 03:37 AM by druuna
Updated 05-16-2013 at 03:52 AM by druuna (added rhel subscription link)

Tags dvd, repo, rhel

This article describes how to make a local repository from a RHEL installation DVD.

First and foremost:

Warning: RHEL is not a free product.

To get access to the fully up-to-date repositories (RHN) a paid subscription is needed.

Without this subscription it will not be possible to get security updates and the newest versions of packages.

An alternative for using RHEL would be CentOS or Scientific Linux. Both are free and almost identical

...

druuna

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Posted in General

Views 27990 Comments 0 druuna is offline