LAB 38: REDIRECTION

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  1. Go into the editor and create the following two-line text file called ex6 :

     Last time I went to the beach I found a sea shell. While in Kansas I found a corn shell. 

  2. Now append this line to your ex6 file:

     The National Enquirer says someone gave birth to a shell, called the born shell. 

  3. Mail the ex6 file to yourself.

  4. Using a pipe, count the number of lines ( wc “l ) in your ex6 file.

  5. To list all set options, type the following:

     set o 

    Do you have the noclobber variable set? If not, type the following:

     set o noclobber 

    What happened ?

  6. Type the following at the command line:

     cat << FINIS How are you $LOGNAME The time is `date`Bye!! FINIS 

    What printed?

  7. Now try this using tabs:

     cat << END    hello there    how are you END 

    What printed?

  8. Type the following at the command line:

     kat file 2> error  print kat failed 

    What happened? Why?

  9. Now type the following at the command line:

     cat zombie 2> errorfile  print cat failed 

    What happened? Why? How does the && operator work? Try your own command to test it.

  10. Use the find command to print all files that begin with an a from the root directory down. Put the standard output in a file called foundit and send the errors to /dev/null .

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UNIX Shells by Example
UNIX Shells by Example (4th Edition)
ISBN: 013147572X
EAN: 2147483647
Year: 2004
Pages: 454
Authors: Ellie Quigley

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