Play audio file from Terminal on Mac OS X without iTunes

Guys, am sure this post will definitely interest you - how to play an audio file from Terminal on Mac OS X without using iTunes. Well, we play it using the "afplay" command.

Well here's what you need to do in Terminal :

afplay -q 1 --leaks /Users/ironcladzone/Music/Bo\ Saris\ -\ She\'s\ On\ Fire\ \(Maya\ Jane\ Coles\ Remix\).mp3 -d -r 1

Playing file: /Users/ironcladzone/Music/Bo Saris - She's On Fire (Maya Jane Coles Remix).mp3

Playing format: AudioStreamBasicDescription:  2 ch,  44100 Hz, '.mp3' (0x00000000) 0 bits/channel, 0 bytes/packet, 1152 frames/packet, 0 bytes/frame

Buffer Byte Size: 20135, Num Packets to Read: 19

Enable rate-scaled playback (rate = 1.00) using Spectral algorithm

-q switch is to set the quality level. 0 is default for low quality. Set it 1 for high quality version.

-d switch is for debugging which shows you the technical details like frames/packet, buffer byte size etc.

-r is the rate / speed of playback. Default is 1. Try changing it to 2 or 3 for speedier playback ;)

Oh and by the way, in case if you didn't notice, I was playing the cool Maya Jane Coles remix of Bo Saris' "She's on Fire". Maya Jane Coles rocks :)

Print a triangle using * in a Bash script

Hello coders! Hows it going? Today we'll see a basic simple shell script to print a triangle using asterisk * only. Here's the code to do that :

#!/bin/bash

# Simple program to print a triangle using * of height 10

star="*"

for i in {1..10}

do

echo "$star";

star="$star *"

done

You see basically, all we are doing is append a * to itself recursively. Here we are using a basic for-loop to print a triangle of height 10. You can change the height as per your requirement, as needed.

Output :

*

* *

* * *

* * * *

* * * * *

* * * * * *

* * * * * * *

* * * * * * * *

* * * * * * * * *

* * * * * * * * * *

Cheers!

Identify exact port number used by a process or app on Mac OSX

Guys, if you ever wanted to find out the exact specific port number used by a process/application on Unix/Mac OSX/Linux, type the following in Terminal :

top | awk '{print $2, $7}'

The output would be something like :

COMMAND #PORTS

awk 12

top 22+

top 19

This will show only the specific Command and Port columns from the top command and will skip other details like Process ID, % CPU utilisation , Memory usage etc.

Alternatively if you wanted to just find the port number used by a specific application, say for e.g. TextEdit, you could use the following command :

top | awk '{print $2, $7}' | grep TextEdit

TextEdit 140+

TextEdit 140

TextEdit 140

Cheers guys!

Read file line by line and count no. of lines using Shell script

Guys, in today's post we'll see how to parse a file line by line and count the number of lines in it.

We will simply use redirection to read the file. Note that we will pass the filename as a runtime parameter to the script.

Alright here we go. Suppose I have a file TextFile1.txt with the following contents. I want to print the total number of lines in it.

ABCD

DEFG

GHI

JKL

MNO

PQR

STU

VWXYZ

Now, here's the script part.

#!/bin/bash

#Sript to count number of lines in a file

File=$1

count=0

while read LINE

do

let count++

echo "$count $LINE"

done < $File

echo -e "Total $count Lines read\n"

Here's the output :

1 ABCD

2 DEFG

3 GHI

4 JKL

5 MNO

6 PQR

7 STU

8 VWXYZ

Total 8 Lines read

Cheers it has correctly displayed the count of lines in the file. In case of any questions/doubts, kindly leave your comments.

Search for string in a file and print the line : Unix basics

Guys, lets look into a very basic topic today. Today we'll see how to search for a string in a file and print the line in Unix/Linux/Mac OS X

Suppose I have a file SedText.rtf with the following text :

1.Here is a cute little tutorial for

2.trying out different things using

3.the Stream Editor or Sed in Unix.

4.The author of this tutorial is

5.none other than IroncladWriter

6.himself. The tutorial aims to

7.teach folks and educate how

8.they could unlock the power

9.of Unix to the fullest. Am posting

10.this on the blog IronCladZone

11.The best blog on the whole of

12.internet, where you can learn

13.technical stuff as well enjoy 

14.entertaining tidbits like movies,

15.music, television, fashion, food,

16.shopping, travel, trends etc.

17.Just sit back, relax and

18.ENJOY THE RIDE :)

Now I want to search this file for the keyword "Unix" and print all the lines. All we have to do is use the grep statement. Check this out :

grep Unix SedText.rtf

3.the Stream Editor or Sed in Unix.\

9.of Unix to the fullest. Am posting\

Metal Gear Solid V : Phantom Pain - Identify the Screenshot 2

Hello gamers! Hope you are having fun with the Phantom Pain - one of the best games I've played in a while. I absolutely love its stealth gameplay and the mind-blowing level of details. Every time I play the game I discover how minutely every detail has been thought about, designed and accounted for. Although at the moment the free roam is not quite exciting, but the various mission areas are just fantastic. The detailing is so very realistic, practical and to the point. Nothing fancy here, just some realtime replicas of outposts and bases.

Another icing on the cake is its haunting soundtrack. Wow! In case you want to listen to it separately, here's the Youtube playlist for In-game soundtrack.

The tracks that I particularly found haunting are :

• Track 62 - Evasion
• Track 68 - Skulls (Before Spotted)
• Track 73 - Afghanistan Caution 2
• Track 102 - Afghanistan Day Enemy Suspicion
• Track 108 - Exfiltrate the Hotzone (Success)

Let me know if I missed any other cool track.

Well, and for today's screenshot of the today, take a look below.

As expected, guess what's the location and the area of operation / mission. Drop in your comments guys.

Oh and in case you missed it, here's the link to MGS V : TPP : Identify the Screenshot : Part 1. Cheers!

Start Stop Jenkins from Terminal on Mac OS X

Ola guys. I hope you came across my previous posts on setting up Ant and Maven with Jenkins. In today's post I'll show you how to start and stop Jenkins from Terminal on Mac OS X machine.

I assume you know how to shutdown Jenkins from console OR restart it from the URL field.

Alright so here we go.

For staring Jenkins from command line, type this in Terminal :

sudo launchctl load /Library/LaunchDaemons/org.jenkins-ci.plist

Give it a few seconds for Jenkins to startup and you can then see the console in the browser. If you still stay executing the startup command again you'll get the following message :

/Library/LaunchDaemons/org.jenkins-ci.plist: service already loaded

In the meantime you can double check if Jenkins has started by checking the process status in Terminal :

ps -ef | grep jenkins

For stopping Jenkins from the command line, type this in Terminal :

sudo launchctl unload /Library/LaunchDaemons/org.jenkins-ci.plist

A rougher way to stop Jenkins is by killing the process ID of Jenkins that you found above with the ps -ef command.