ttyrec is a tty(terminal) recorder in unix like operating system & recorded data can be played back with the help of ttyplay command. ttyrec is just a derivative of script command for recording timing information with microsecond accuracy as well. It can record emacs -nw, vi, lynx, or any programs running on tty.
Installation on Ubuntu :
$ sudo apt-get install ttyrec
Installation on RHEL 6.X / CentOS 6.X / Fedora
First Download the ttyrec rpm package using wget command and install using below mentioned yum command.
# wget ftp://ftp.pbone.net/mirror/ftp.turbolinux.com/pub/TurboLinux/stable/tested/Desktop/10/i586/ttyrec-1.0.6-1.i586.rpm # yum localinstall ttyrec-1.0.6-1.i586.rpm
Now start Recording using ttyrec command :
Open the terminal type the below command and when you want to stop the recording type exit.
When we run the above command recording of terminal session will start and when you type exit, recording will be stopped and a file name ‘ttyrecord’ will be created in the current directory.
Now Play the recorded session using ttyplay command
# ttyplay ttyrecord
commonly used options in ttyplay:
- -s SPEED : multiple the playing speed by SPEED (default is 1).
- -n : no wait mode. Ignore the timing information in file.
- -p : peek another person’s tty session.
We can also change the speed by using special keys like :
- + or f double the speed of playback.
- – or s : halve the speed of playback.
- 0 : set playback speed to 0, pausing playback.
- 1 : set playback to speed 1.0 again.
Measuring the time of recorded data:
Using ttytime command we can determine the time of recorded data in seconds.
# ttytime ttyrecord 14 ttyrecord