Ubuntu: youtube downloader

 

 

To download youtube videos or any embedded videos from websites,

1. Install firfox if you don't have it on your system.


2. open firefox web browser


3. go to Tools->Add Ons


4. search for video downloadHelper


5. the "video downloadHelper" add on will appear in search results.


6. install the add on.


7. restart the firefox.


8. open youtube.


9. click on some video.


10. to the left of address bar in firefox, you will see one animated bubbles playing, which means the particular website has an embedded video to download.


11. click on it and download the video.


12. DONE.

configure exchange global address book on thunderbird 17

steps:

1.   on thunderbird, go to Tools->address book
2. a new window pops-up. go to File->New->LDAP Directory
3. a new small window pops up.
4. name =
5. hostname = check in outlook. Else, most probably if your mail server is ..com, your hostname for address book will be .com
6. BASE DN = dc=y,dc=com
7. port number = 3268 ( default port 389 did not work for me)
8. bind DN = domain\username
9. do not check "use secure...."
10. click OK
11. right click on the address book you have created, click properties, go to 'offline' tab
12. click "Download Now"
13. you should get a 'replication succeeded" message.
14. To test, compose a mail. go to view->contacts sidebar
15. type some half name in search bar that it shows. suggestions should pop up. Now its working for you!.
16. If you would thunderbird to auto-search names form global address book while you type name in "To" list, go to edit->preferences->composition->addressing, check "Directory server" option and chose the global address book that you just created from the drop down menu. click OK.
17. now open a new mail window, start typing some name, observe suggestions that thunderbird shows up!!! Works wonderfully! 

vim open remote file via ssh

command:

vim scp://userid@remotePc//path/to/file

this command will prompt for password on

grep for multiple strings

command:

grep "string1\|string2\|string3"

gdb debug with different library path

$ gdb
(gdb) set solib-absolute-prefix ./libdir
(gdb) file ./a.out
(gdb) core-file ./a.core

linux: execute particular history command

suppose you want to execute a particular command out of N history commands:

$history

...
...
...

1992  pwd
 1993  clear
 1994  cd foo
 1995  ls
 1996  ./a.out
 1997  ls -als <<== if you want to execute this command, run "!1997 " on terminal
 1998  ssh bar
 1999  ping bar
  2000  history
$!1997

how to cross compile openssl

http://openssl.6102.n7.nabble.com/cross-compiling-questions-td21307.html

how to escape $(dollor sign) in makefile

to escape $ sign in Makefile, you will have to use double dollor sign. i.e

$$ will be interpreted as "$"

sed search lines and comment out or uncomment

comment out..

             sed '/pattern/s/^/#/' 

uncomment out...
             sed '/pattern/s/^/# *//'

srpms introduction

http://www.rpm.org/max-rpm/s1-rpm-miscellania-srpms.html

http://crashcourse.ca/content/working-source-rpms-under-centos

echo '%_topdir %(echo $HOME)/rpmbuild' > ~/.rpmmacros

extract source rpms

1. rpm2cpio - Extract cpio archive from RPM Package Manager (RPM) package.
2. copy files to and from archives

rpm2cpio | cpio -id

ubuntu CTRL+ALT+F10

CLTRL+ALT+F10 - kill desktop
CTRL+ALT+F7 - restore desktop

Mounting Windows Shares In Linux

http://industriousone.com/blog/mounting-windows-shares-linux

ubuntu tip: show tty console instead of GUI login

press ctrl+alt+F1 once ubuntu booted showing login prompt to switch to tty console.

Ubuntu tip: show hidden files in folder window ubuntu

Ubuntu tip:
to show hidden files in the folder window graphically, press ctrl+h on the folder window

shell IF statements

shell script, IF evaluate conditions:

Expression	Description
-d file	True if file is a directory.
-e file	True if file exists.
-f file	True if file exists and is a regular file.
-L file	True if file is a symbolic link.
-r file	True if file is a file readable by you.
-w file	True if file is a file writable by you.
-x file	True if file is a file executable by you.
file1 -nt file2	True if file1 is newer than (according to modification time) file2
file1 -ot file2	True if file1 is older than file2
-z string	True if string is empty.
-n string	True if string is not empty.
string1 = string2	True if string1 equals string2.
string1 != string2	True if string1 does not equal string2.

terminator; terminal for developers

terminator is an alternative for your putty on widows or gnome terminal on ubuntu/linux.

short tut on using it..

• Ctrl-Shift-E: will split the view vertically.
• Ctrl-Shift-O: will split the view horizontally.
• Ctrl-Shift-P: will focus be active on the previous view.
• Ctrl-Shift-N: will focus be active on the next view.
• Ctrl-Shift-W: will close the view where the focus is on.
• Ctrl-Shift-Q: will exit terminator.
• F11: will make terminator go fullscreen.