gbrainy

Hello All...

gbrainy is a software on OSS to keep our brains up and running...

Install the software via synaptic package manager or via command line..

It has 4 categories or different levels of games- Logical, Mental calculations, memory trainers and verbal challenges ...

Check out the snapshot for more clarity..

Play it and keep your brains working..
Ananth S Gouri

passwd - 2

Dear All,

Continuing from the last post of "mkpasswd"

U folks need to use 'passwd' to change the password.

I can simplify things this way:

Say if your username on a UNIX machine is "telsaT"

and you have this password "test123"

mkpasswd helps you to generate random passwords... Useful many a times when we want to change our passwords on servers frequently...

As the root user - you can issue the command mkpasswd

Then give it as an input to passwd - again a command for which you need root privileges...

Similar to the command mkpasswd - some linux distributions offer a command called makepasswd

The command usage of makepasswd is:

makepasswd - which generates a random password

You can generate a random password of given length - with this below command:

makepasswd --chars 20

You can also generate a series of random passwords with the command:

makepasswd --chars 20 --count 5

Hope this post is interesting to some of you...

Thanks & Regards,
Ananth S Gouri

Lex and Yacc

Hey All,

This post explains how to install lex and yacc onto your Linux distros and how to run small programs.

For Debian based systems - there is a package called Flex. Install it. This is the alternative for lex. Here you go - the definition from Synaptic itself:

A Flex generates as output a C source file, lex.yy.c, which defines a routine yylex().  This file is compiled and linked with the -lfl library to produce an executable. When the executable is run, it analyzes its input for occurrences of the regular expressions. Whenever it finds one, it executes the corresponding C code.

Similarly to work yacc - there is tool called Bison. Install it using synaptic.

Or you can install it via cmd line issuing the command:

sudo apt-get install flex bison

After installation, you can execute the attached program [see dropbox link - https://www.dropbox.com/s/ynbcghps02vhmo4/a.l?dl=0] for counting the number of consonants and vowels in a given input.

Run the lexical analyzer to create tokens from the program - a.l

Issue the below commands:

[1]flex a.l

This would create a file called lex.yy.c - A C file. Compile this C file to get your executable

[2]cc lex.yy.c -o al -ll

Finally run the executable:

[3] ./al

You should not be able to type input to the program

Type "Linux" [without quotes] and press enter.

Type Ctrl + D to see the output as shown in the below diagram.

The next post will help you to figure out how to run a yacc program.

Till then, keep reading.

Tc,
Ananth S Gouri

Ubuntu 15.10 aka Wily Wirewolf - released

Dear All,

The Canonical Ubuntu 15.10 is released. Code named wily wirewolf - the amd64 version of the OS is around 1.2 gb in size.

http://releases.ubuntu.com/15.10/?utm_source=omgubuntu

You can download the various versions of the OS from the above link.

Also this below link provides the new features of this release:

http://www.omgubuntu.co.uk/2015/10/ubuntu-15-10-download-review-new-features

Check it out and let me know if any one wants the DVD to shipped inside Karnataka. I can help you out for free.

PM your addresses !

Tc,
Ananth S Gouri

Manipulating a problematic Canon CAPT driver in *nix systems

Hey Fellas,

Its been a while since I am blogging. Sorry for that. Currently I am using Debian 8.1. This is FYI !

This post is for people who have a Canon LBP**** series working printer in UNIX based systems.

If you have earlier read posts like this :
https://help.ubuntu.com/community/CanonCaptDrv190

and found difficulty in manipulating ccpd - the daemon service - this post is specifically for you folks...

Canon CAPT ccpd - can print iff there are equal to or more than 2 pids...

This could be verified with the command -

sudo /etc/init.d/ccpd status 

which should show minimum of 2 pid values.

If in cases where there are less than 2 pid values, that is when the trouble starts.

You as a root user can stop the service by issuing the below command:

sudo /etc/init.d/ccpd stop

But some times this would not stop the service.

Issue this below command [1] to completely kill the service and then restart the service with the next command [2]

1. sudo pkill -9 ccpd
2. sudo /etc/init.d/ccpd restart or sudo /etc/init.d/ccpd start


After issuing the above commands - verify the status by this command related GUI

captstatusui -p LBP2900 [if your printer is LBP2900 & for other names change accordingly]

Hope this small post helps you to some extent...

If you are all facing issues with installing ccpd for your respective *nix lemme know...

Tc,
Ananth D Geek !