Script Specifics
parameters.sh
The script should do the following:
-
Print the the positional parameters 0 through 4 to the terminal.
-
Print the number of arguments given to this script from the command line.
Each positional parameter
must be labeled and printed on a separate line.
Be sure to test this script several times to make sure it works.
log_users.sh
The script should do the following:
- Define a variable log whose value
is the filename for the log file, users.log .
-
Append the date to the log file whose name is contained in log.
-
Append a line of dashes to this log file to act as a separator.
-
Append a list of the users currently on to it244a to this log file.
-
Append a blank line to the log file.
The value
users.log should be assigned to the variable at the top of the script.
Thereafter,
never never write "users.log" in your script.
Use the value of
log instead.
Be sure you
append the output so the log grows each time you run the script.
After running this script twice, the log file
users.log should look something like this:
$ cat users.log
Wed Dec 5 10:38:58 EST 2012
-----------------
Login Name Tty Idle Login Time Office Office Phone
cs110ck Dummy for Chris Kelly pts/0 Dec 5 10:29 (dsl092-066-161.bos1.dsl.speakeasy.net)
Wed Dec 5 10:39:06 EST 2012
-----------------
Login Name Tty Idle Login Time Office Office Phone
cs110ck Dummy for Chris Kelly pts/0 Dec 5 10:29 (dsl092-066-161.bos1.dsl.speakeasy.net)
Be sure to test this script several times to make sure it works.
envir.sh
The script should do the following:
- Test that it has been given a command line argument.
It should print a usage message and exit if no argument is given.
- List all global variables that contain the string given in
the command line argument.
Do this using a pipe calling
env and then
grep to
filter the output of
env for variables which
contain the string given as an argument to the script.
Thus, if I wanted to see all variables that contained "SSH", I would run
./envir.sh SSH
Be sure to test this script several times to make sure it works.