What is the primary difference between binaries located in /bin and /sbin versus /usr/bin and /usr/sbin?

The command that would append the output from the encrypter to the current contents of the file private and read in the contents of the file top_secret, is:

When you execute the command 'cp . newdir', you...

To be run by the shell, a shell script needs the following permission(s):

How does Unix maintain its time clock?

To list the current users logged on to the system you use:

Which of the following statements is incorrect regarding variables?

You want to search for the pattern 'Newa' or 'Newb' or 'Newc'. Which regular expression will you use with the grep command ?

Which of the following commands can be used to view the calendar of April 2007?

In UNIX , shell is a program which :

UNIX offers the following benefits :