1

2

5

6

To synchronize user applications

To synchronize keyboard and monitor

To synchornize disk buffers

To syschronize main memory and cache memory

Printer users

Not allowed to login using rlogin/ssh

root users

User id cannot be 0

0

4

1

2

gunzip/expand

gzip

zip

winzip

tar -cvf file/tar -xvf file

tar -xvf file /tar -cvf file

tar -cvf file.tar /tar -xvf file.tar /

tar -xvf file.tar /tar -cvf file.tar /

fg,bg, &

switch

None

Both

Every one can read, group can execute only and the owner can read and write

Every one can read and write, but owner alone can execute

Every one can read, group including owner can write, owner alone can execute

None

A request by the users to access kernel functions

A request by kernel to the device

A request by the device to kernel

None

/ *

/$

/&

None

A mechanism to connect to printer, keyboard and monitor in linux

A mechanism to share printer across users

A request made by the device to linux kernel

None

sort -d

sort

sort -r

sort -R

:mx#2:

:mx#2

:mx#2\

None

A free implementation of PostScript

A printing management tool

A program for converting files to PostScript

A free interpreter of PostScript

g:Linux/d

:g/Linux/d

g/d/Linux

Linux/:g/d

A remote machine address

A printer on a remote machine

A remote printer address

Both a printer and a remote machine

Prevent two jobs being sent to the same printer simultaneously

Keep track of all the print jobs in the spooling directory

Assign job numbers to new print jobs

Record the owners of print jobs

The owner of the job

The root user

Anyone

Anyone who can submit jobs to the print queue

The $* shell variable

The $@ shell variable

Redirected input

Redirected output

$0 to $9

$0 to $10

$1 to $9

$1 to $10