Basically i am talking about Linux terminal and without installing any new programs. I will also not use any programming languages. I am not digging into regexp details, please refer to their documentations. Many programs have their own regexp and syntax so I usually pipe the output to the input of egrep or such to satisfy my needs. This document is for reference and only states how i use them. These are obviously not the only ways.

1. ls (dir also does things similar) : List the contents. Ls is the first command I use to search in Linux. Obviously the very basic but also, very useful if you know in which directory your file is. This command was written partly by Richard stallman himself. To do a simple search just type ls followed by the file name. Other examples:

    # To search file names with a fixed file-type (Using Wildcard)
    # Here I am searching for mp3 files in my current directory
    ls -C *.mp3
   
    * this matches everything that has a ‘.mp3′ anywhere in the filename and puts it in a column (-C).
   
    # To search for file whose filetype and first starting character I remember
    # I am searching for mp3 files whose first character is y
    ls | egrep ‘^[Yy].*.mp3$’
   
    * this matches everything starting(‘^’ for starting character) with a ‘Y or y’ and any number (here ‘*’ for any number of times) of character (here ‘.’ for any character) following it which ends in “.mp3″ (here $ as end of line).
   
2. locate : Locate is a command line file search utility which finds file by it’s name until regexp is used. Unlike ls, locate searches for files in all directories. But it has a major drawback. It uses a database(‘/var/lib/mlocate/mlocate.db’) to search from, which might not be updated all the time.

    # To update the database use
    updatedb

3. who (also, finger and w) : While a little different, it searches for users who are logged into the computer right now. Finger provides a little more detail
    # To find out who logged into the system after the computer booted type:
    who -a -H
   
4. whatis (apropos and man) : These commands searches for discription about some binaries, files whose manual pages are available. It is very useful to find out if an application is installed which additionally displays descriptions (short description in whatis and broader and long description in apropos and a complete manual with man) of the application. whatis and apropos supports regex and wildcards.

    # To find out if ls is installed in your system with whatis type:
    whatis ls
   
    # To do the same with apropos
    apropos -e ls

5. whereis : Whereis searches for binary files, source files and manual pages about the binary or source.
It is useful to find out where a binary is located and where is it executed from. It doesnot support regex and wildcards.
    # To find out where ls is located type
    whereis ls

6. find: The most advance tool to search from command line installed by default is find. It searches for files in a directory hierarchy.

    # Ls like command from Find
    find Desktop/ -print

    # Starting from root Find file with filename
    find / -name fname
   
    # Starting from root find string ‘fname’ in a filename
    find / -name “*fname*”
   
    # To Find all setuid and setgid programs on your host
    sudo find / -type f -perm +6000 -ls 2>/dev/null

    * “Set-user-ID root” programs run as the root user, regardless of who is executing them,
    and are a frequent cause of buffer overflows. So, I’ll find them to remove selected ones.

   
    # Find all world-writable files on your system
    sudo find / -perm -2 ! -type l -ls 2>/dev/null
   
    * The stderr (here ’2′) is sent to (with ‘>’) /dev/null (a null file in linux).

    # Identify all files that do not have an owner or belong to a group
    sudo find / -nouser -o -nogroup
   
    # Suppose that, I want to find out a file whose name I don’t remember but could decide which file it is by viewing     the first line

    find Desktop/ -print0 | xargs -0 head –lines 1 2>/dev/null
   
    * Find prints full filenames of Desktop to stdout followed by null character. Which is piped to xargs which manages spaces and characters and blissfully redirects the output to child processes that prints 1 line from it’s start which are created every-time a filename is encountered.
   
7. ps:ps displays information about a selection of the active processes. If
       you want a repetitive update of the selection and the displayed
       information, use top instead. Other ps like commands are (top,pgrep and pstree)
      
       # To see every process in the system
       ps -ef
      
       # To print a process tree
       ps -ejH or a beautiful one with ps -ef –forest
      
       # To see every process running as root
       ps -U root -u root u
      
       # Send Termination signal to Process ‘MySql’ after finding it’s id
       sudo kill -s TERM ‘ps -C mysqld -o pid=’
      
       # Sort according to cpu usage
       ps u -e –sort cp
      
       # Sort according to memory uses
       ps u -e –sort pmem

8. netstat: Netstat  prints  information about the Linux networking subsystem.

    # To display a complete information
    netstat
   
    # To display information interface wise
    netstat -i
   
    # To display information about routing
    netstat -r

    # Show network statistics
    netstat -s
   
    # Display lsof type result
    netstat -p
   
9. proc: Proc file system is a pseudo-file system which is a kernel and process information gathering virtual filesystem. To access a process and it’s information use syntax: “/proc/[pid]/…”

    # To Find a processes status
    cat /proc/[pid]/stat
   
    # To find the command line for a process
    cat /proc/[pid]/cmdline
   
    # To find the environment variable of the process
    (cat /proc/1/environ; echo) | tr ’00′ ‘\n’
   
    # To fetch information about your battery where BAT0 is battery id
    cat /proc/acpi/battery/BAT0/info
   
    # To fetch information about your cpu
    cat /proc/cpuinfo
   
    # To fetch information about filesystems in your computer
    cat /proc/filesystems
   
    # An alternative to fstab
    cat /proc/mounts
   
10. lsof :
   
    # List open files used by internet
    lsof -i
   
    # List files opened by internet and used by example.com and port 20
    lsof -i @example.com:20
   
    # List all open files on device sda1
    lsof /dev/sda1

After installing Ubuntu 10.10 into my computer the following are the list of software and tweaks i did to my computer. If you like it you can use it.

1. Installed Firefox addons:
a. Adblock Plus
b. DownloadHelper
c. Download Statusbar
d. FaviconizeTab
e. Fission
f. Greasemonkey
g. Omnibar
h. Smart Stop/Reload
i.  SmoothWheel
j.  Stylish (installed the style: Highlight Input&Textarea)
k. Firebug
l. FireFTP
m. Chromifox Basic

And Did the following Tweaks

Typed about:config in url bar and changed the following values

a. media.autoplay.enabled->false
b. network.buffer.cache.size->8192
c. network.http.max-connections-per-server->30
d. network.http.pipelining->true
e. network.http.pipelining.maxrequests->20
f.  network.http.pipelining.ssl->true
g. network.http.request.max-start-delay->2
h. plugins.hide_infobar_for_missing_plugin->true
i.  plugins.hide_infobar_for_outdated_plugin->true
j.  network.http.keep-alive->true
k. network.http.max-persistent-connections-per-server->30

PS: you can enable pipelining for proxy in the same manner too.

2. Installed software in Ubuntu:
1. Gimp
2. Vlc Media Player
3. Docky
4. Clementine Music Player
5. Zeitgeist Engine
6. Gloobus-preview
7. elementary desktop
8. Nautilus elementary
9.  Elementary theme for nautilus
10  Recoll Search engine
11. Artha Dictionary
12. Hotot Twitter Client
13. Geany
14. Wine
15. CCSM
16. apt-fast
17. nautilus-script-manager
18. nautilus-terminal
19. skype
20. vim
21. Global-Menu Applet
22. Nmap
23. Ethereal
24. Wireshark
25. Experimental Plugins for Compiz
-> sudo apt-fast install compiz-fusion-bcop compiz-dev \
build-essential libtool \
libglu1-mesa-dev libxss-dev \
libcairo2-dev git-core
-> git close git://anongit.compiz.org/users/soreau/scripts
-> cd git
-> ./compiz-addons install all
26. Ubuntu Tweak
27. Pdf Suffler
28. axel
29. hugin
30. bum
31. pdfedit

3. Plugins/addons
a. Adobe Flash Plugin
b. OpenJDK
c. Gstreamer Plugins
d. Ubuntu Restricted Extras
e. Any hardware drivers which i may need

4. Addons for gedit
a. Auto Tab
b. Browser Preview
c. Class Browser
d. Tabs Extended
f.  File Browser Pane

5. Tweaks for ubuntu
a. Sanitize panels
b. Adjust fonts and resolution
c. Put up nice background picture
d. change vlc looks to minimalistic and without menus
e. change desktop edge settings
f. change number of workplaces and their arrangements
g. Increase memory size in ooffice and choose small icon sets
h. customize ooffice toolbars and fonts
i. Disable help agent in ooffice
j. Tweak vimrc file and bashrc files
k. Stop unused application from starting up

My Linux box was running mysql from the start and I did have no clue. It was not in my startup applications list, neither in my init.d folders.

But whenever i did nmap of localhost, i could see the mysql port open. I could kill mysql service, need to kill it multiple times, only then it used to die.

I even installed “sysv-rc-conf” so that i could stop it at run levels, but it was not running at any runlevels. I then did “update-rc.d mysql disable”. Which didn’t work either.

Later I found that there was a file called “mysql.conf” in /etc/init/ folder. I renamed the file to mysql.conf.disabled and it worked out. Hope this will help others who have the same problem.

By using the following script you can easily lookup for an ip or domain using zenity and shell script. (sorry Windows folks, i just hate you).

#!/bin/bash
# Get the domain name
Z=”/usr/bin/zenity”
O=”/tmp/whois.o.$$”
domain=$(${Z} –title  “Domain Information” \
                –entry –text “Domain name who’s information you seek!” )

if [ $? -eq 0 ]
then
    whois $domain  | tee >${O}
 
  # Display back output
  ${Z} –width=800 –height=600  \
               –title “Whois info for $domain” \
               –text-info –filename=”${O}”
else
  ${Z} –error \
               –text=”No input provided”
fi

Enjoy.

Posted via web from Linux fanatic

After a long time, I am back and am back in ruby too.
doing new things in ruby.

class linuxfanatic 
  def says(message)  
    puts message  
  end  
end  
  
tushar = linuxfanatic.new  
tushar.says “oh i am back in ruby!” 

Posted via web from Linux fanatic

To make this script work the map must have some point to the center. Else, click on the center of the map of whose you want longitute and latitute and then paste the following in your browser. You will get your result.

javascript:void(prompt(”,gApplication.getMap().getCenter()));

Posted via web from Tutorial Universe

This list is compiled for my personal use, should work for anyone. Try the followings:

1. Use lighter applications (Replace your default applications with them)

Gedit >> Mousepad
Picture viewer (EOG …) >> Gpicview
Network Manager >> Wicd
Evince >> epdfview

2. Increase Swappiness

$ sudo vim /etc/sysctl.conf
Edit: vm.swappiness=10

3.  For dual cores (Use Concurrency)

$ sudo vim /etc/init.d/rc
Edit: CONCURRENCY=shell

4. Clean up apt cache at /var/cache/apt/archives and unneccessary apt-sources list in /etc/apt/sources.list

$ sudo apt-get autoclean

5. Install BUM (Boot Up manager)

$ sudo apt-get install bum

Remove unneccessary applications and services from startup

6. Remove some unneccessary TTY’s

$ sudo vim /etc/default/console-setup
Edit: ACTIVE_CONSOLES=”/dev/tty[1-3]“

Note: goto /etc/event.d/ and change the tty’s files that you DONOT want. Edit them and comment lines starting with “start on runlevel”. So, in this case, you’ll comment the start line in tty4..tty6 files.

7. Install Prelink

$ sudo apt-get install prelink
$ sudo vim /etc/default/prelink
Edit: PRELINKING=Yes
$ sudo /etc/cron.daily/prelink

 8. Install Preload

$ sudo apt-get install preload

9. Get rid of kinit if you don’t use hibernate and sleep functions.

$ sudo vim /etc/initramfs-tools/conf.d/resume
Edit: Comment (Put # in front of) RESUME=XXXX…………………….

[Disclaimer] Administer the following at your own risk.

Posted via web from Linux fanatic

————————————————————————————————————-

” Tushar Neupaney’s VIMRC File
” Followme twitter.com/tneupaney
” linuxfanatic.posterous.com

” (sw)shiftwidth: how many columns text is indented with reindent operations
” (sts)softtabstop: how many columns vim uses when you hit tab
” (ts)tabstop: how many columns a tab counts for
set ts=4 sw=4 sts=2

” expandtab: appropriate number of spaces in insert mode
set expandtab

” Make gvim colorscheme as evening
if v:progname =~? “gvim”
colorscheme evening
endif

” Prevents keeping of backup after overwriting the file
set nobk

” To see line numbers on the left
set number

” autocomplete parenthesis, brackets and braces
inoremap ( ()<Left>
inoremap [ []<Left>
inoremap { {}<Left>

” Syntax highlighting on
syntax on

” share windows clipboard
set clipboard+=unnamed

” Hightlight the curent column
set cursorcolumn

” Hightlight the current line
set cursorline

——————————————————————————————-

Here is the Screenshot!

Trying out ubuntu in our new office laptops the Compaq CQ40, I found out that the wireless driver was not working. To find out the actual wirelss device installed in the system I tried the following commands:

1. lshw -C network

This gave me the product result as BCM4312 802.11b/g from Broadcom Corporation. Tried a lot of googling and found that you could download a file from broadcom here. And do the following! While this works for me.

# Removing previous instances of wireless drivers if any
1. lsmod | grep “b43\|ssb\|wl”
2. rmmod b43
3. rmmod ssb
4. rmmod wl

# Prepare the device driver from the file that you’ve downloaded
5. cd to the downloaded file
6. make clean
7. make

# Blacklist previous drivers
8. echo “blacklist ssb” >> /etc/modprobe.d/blacklist.conf
9. echo “blacklist b43″ >> /etc/modprobe.d/blacklist.conf
10. echo “blacklist wl” >> /etc/modprobe.d/blacklist.conf

# Install the driver
11. insmod wl.ko

Posted via web from Linux fanatic

1. Albert Einstein action figure: Dressed for intense classroom action, this Albert Einstein Action Figure stands with a piece of chalk in his hand, poised to explain relativity or do battle with the forces of entropy

2. 3-D Paper Notepad: Now you can practice origami in the office and make use of all the old sticky notes you have plastered to your desk. Each pad has printed instructions on each sheet for 10 different origami shapes. From UK-based design company Suck UK.

3. Control-A-Cat-Remote: Simply point at your cat, press buttons on the remote and hope for the best. With buttons for “Stop Scratching”, “Show Affection”, “Remain Aloof” and others, you’ll be in control in no time. It’s finally your turn to make your cat do what you want.

4. Paper E-mail: Paper E-mail is perhaps the funniest way to pass messages in your office. Why? Because it will confuse the person you send it to. ‘Why didn’t they just e-mail this to me?’ they’ll wonder, ‘is their computer down?’

5. Star Wars dolls: Each one is officially licensed by Lucasfilm and crafted by only the finest plush-clone engineers Kamino has to offer. They are huggable and throwable and small enough to hide in a back pack or on your desk.

6. Infectious Cute Microbes: Most folks never realize how cute microbes can be when expanded 1,000,000 times and then fashioned into cuddly plush. Until now, that is. Keep one on your desktop to remind yourself that there is an “invisible” universe out there filled with very small things that can do incredible damage to much bigger things.

7. Tiny Remote: The Micro Spy Remote’s powers will work on a wide variety of televisions (Sony, Panasonic, Samsung, Toshiba, Sanyo, Aiwa, Mitsubishi, Philips, JVC, Sharp, etc) and its small size will safeguard you against discovery. Remember, Agent 002, if you are caught, the Department will not save you. You are on your own. Good luck, Mr. Blond.

8. Usb SnowBot: Powered by a simple USB port, the Snowbot has a scanning light just like the robots from the future. You can change the speed of the scan, turn on/off the scanning noise, and (for future protection) change the scan color (red or blue). So no matter which robot army storms your home or office, a quick flick of a switch and you are rooting for the invader’s color.

9. Utili-Key 6-in-1 Tool: The lightest, most compact multiple tool ever developed! If you feel lost without your trusty knife at your side, this tiny multi-tool can give you some great company. Easily closes to attach to any key ring, making it super easy to carry.

10. Cool Shooters Ice Shotglasses: The two biggest problems in hosting a truly epic party are keeping the drinks cold, and glass breakage. So, the good scientists at ThinkGeek Hootenanny Industries, L.L.C. realized there was a need begging for a product. After weeks of study and drinking well into the night, we found the Cool Shooters Ice shotglasses tray.

Posted via web from Linux fanatic