xdotool

xdotool lets you programmatically simulate keyboard input and mouse activity, move and resize windows, etc.

To search for an application with title name, run

xdotool search --name TEXT_TO_SERCH_HERE

This will return ID of the windows. You can use xwininfo command to view information about the application window.

Example

boby@hon-pc-01:~ $ xdotool search --name RuneScape
77594631
boby@hon-pc-01:~ $ xwininfo -id 77594631

xwininfo: Window id: 0x4a00007 "RuneScape"

  Absolute upper-left X:  65
  Absolute upper-left Y:  24
  Relative upper-left X:  0
  Relative upper-left Y:  0
  Width: 1855
  Height: 1056
  Depth: 24
  Visual: 0x21
  Visual Class: TrueColor
  Border width: 0
  Class: InputOutput
  Colormap: 0x20 (installed)
  Bit Gravity State: NorthWestGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsViewable
  Override Redirect State: no
  Corners:  +65+24  -0+24  -0-0  +65-0
  -geometry 1855x1056-0-0

boby@hon-pc-01:~ $