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

speed up your build process "make"

use "make -j"

where number of jobs are those that can run parellel to make it faster

static variables in function scope are not thread safe

http://blogs.msdn.com/b/oldnewthing/archive/2004/03/08/85901.aspx

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.

linux utility: screen

'screen' is a linux utility that enables you to open multiple sessions without multiple ssh login to same remote server. for example, you have logged into a remote server, and you run a command in forground, and now you want to run another command simultaneously, you will have to open another remote session by logging in again. this can be avoided by using 'screen' that if you run on the remote terminal, it will launch another remote prompt within the same terminal.

install:
apt-get install screen // ubuntu

login to remote server:
ssh xyz@remoteServer

$screen


commands to switch between two prompts:

 Ctrl+a c     Create new window
Ctrl+a k    Kill the current window / session
Ctrl+a w    List all windows
Ctrl+a 0-9    Go to a window numbered 0 9, use Ctrl+a w to see number
Ctrl+a Ctrl+a    Toggle / switch between the current and previous window
Ctrl+a S    Split terminal horizontally into regions and press Ctrl+a c to create new window there
Ctrl+a :resize    Resize region
Ctrl+a :fit    Fit screen size to new terminal size. You can also hit Ctrl+a F for the the same task
Ctrl+a :remove    Remove / delete region. You can also hit Ctrl+a X for the same taks
Ctrl+a tab    Move to next region
Ctrl+a D (Shift-d)    Power detach and logout
Ctrl+a d    Detach but keep shell window open
Ctrl-a Ctrl-\    Quit screen
Ctrl-a ?    Display help screen i.e. display a list of commands

hibernate ubuntu 12.04

by default hibernate option is disabled on ubuntu 12.04. to hibernate, open terminal, and execute pm-hibernate  command.