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! This is Abhilash - A Ruby developer for years, specialised on web development. Right now working as a freelance Ruby Developer. I am also working on Angular, Sinatra and many other backend infra. Mainly working on Ruby On Rails platform since 2010. This blog is about Ruby, Ruby On Rails and other subjects that I had a chance to go through. You can contact me here: abhilash.amballur@gmail.com Abhilash AK

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