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What are the default access privileges set for a FIFO.?
How can we change read and write privileges for a FIFO?
what are the commands for this above question ?

What does the command do lpr -Pqpr [0-9]*.jpg do ?

thanks . what about for login shell ?

yes it is bash

---------- Post updated at 04:07 PM ---------- Previous update was at 03:47 PM ----------

Please explain it more !

what command should i use for displaying the manual pages for the socket, read and connect system calls?

I have a question:
Where would I put the Command line (of any command) so that it executes every time I log on? Where would I put it if I want it to execute every time I start a new shell?