The agency that sits between the user and the UNIX system is called the
logic
profile
shell
erxc
Which of the following commands is used to update access and modification times of a file?
grep
wc
touch
cat
Which command is used to count just the number of characters in a file?
wc - 1
wc -c
wc -w
wc -r
Which of the following commands is used to list contents of directories?
ls
lp
dir
tar
Which command is used to display a file contents in octal form?
cd
od
of
oct
Which command will be used with vi editor to insert text to left of cursor?
s
S
a
i
In vi editor, forward search is performed using the command.
:pat
/pat
All of the above
Which of the following special shell variables is used to process number of the last background job?
$!
$#
$0
$*
Which option will be used with ps command to slow the entire command line of the process being run?
-4
-f
-1
-5
Which of the following command addresses all users who are currently hooked on?
write
mail
wall
mesg