Unix file system : Devices

/dev/rp00 and /dev/rp01 are named after the DEC RP06 disc drive attached to the system. We cannot make a link to a file in another subsystem. One reason is that the inode numbers are not unique in different file systems.
$ df
$ tty
$ mesg n
$ mesg y

The ‘df’ command tells the available space in the mounted file subsystem. The ‘tty’ command tells which terminal we are using. So we can send files and informations to that terminal and it appears in the corresponding terminal. ‘mesg n’ turn off the messages. /dev/tty is a synonym for our terminal.

If we want to run a program and its output files are not importent we can redirect it to ‘/dev/null’ causes its output to be thrown away.

Author: Abhilash

Hey! My name is Abhilash - A Ruby developer for years, specialised on web programming, working as a freelancer. Mainly working on Ruby On Rails platform since 2010. This blog is about Ruby, Ruby On Rails and other subjects that I work. You can contact me here: abhilash.amballur@gmail.com Abhilash AK

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s