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Showing posts from July, 2016

Could not get lock /var/lib/dpkg/lock

Today, I tried to install Git on my Ubuntu machine and during that I received following exception related to locking. In my this post, I have shared all commands and error messages with you.


Command
sudo apt-get install git

Error Message
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?



After searching above message, I found a command
sudo lsof /var/lib/dpkg/lock
after pressing ENTER, it might asked you for password. Type the password and in result you might get following output
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs       Output information may be incomplete. COMMAND    PID USER   FD   TYPE DEVICE SIZE/OFF   NODE NAME unattende        1468 root    5uW  REG    8,1        0 154817 /var/lib/dpkg/lock
Type following command to kill the session with provided PID by your system. In my case PID # was 1468. I use following comman…

NodeJS Series: Calling Sleep Method.

Dear Friends,

This is my first article about NodeJS, I am currently exploring it and problems which I found during my learning sessions, I will share it to you with my blog posts.

Today while writing some code, I come across the need of sleep functionality between two transactions. While doing google, I found "sleep" library which provide required functionality.

Calling of sleep method is simple e.g.,

sleep.sleep(1) // time will be defined in seconds 

But before that you need sleep library / package. To download it, use following npm command

npm install sleep

After successful installation, write following code to test this functionality.

var sleep = require('sleep');

function callLoops()
{
for(var a=1;a<10;a++)
{
console.log('%d',a);
sleep.sleep(1);//times in seconds.
}
}

callLoops();

and save this code in myExample.js file.

Execute the file with following command

node myExample.js

Congratulations...... You have achieved the goal.

That's all for now folks..... If …