Scripting in BASH

[Chris4610]

Hello, I am trying to figure this out and really could use some help. Below is what i'm being asked to do and below that is a script I had to write the previous week, according to what I need to do it's an extension to what I've already done. I really could use help in this and look forward to a reply, my email is cf4610@gmail.com.

Ty,

Chris


Case – switch 2, 9 points (3 if it runs correctly, 5 if all components are included and 1 for
comments) and yes we live in a partial credit world.
This project is an extension of the case and switch assignment from last week. We have
used all the elements of this script in prior homework projects, puzzles and/or scripts.
This time around everything is a choice in a case switch script.
Your shell script will use case and switch and should include the following elements:
some kind of conditional test to proceed (date, verify users is logged, etc)
request the user’s name (save as a variable to be used at exit)
a counter that counts the number of total choices made by the user
a use of the cut command (cut a field from you friends list or some other file)
an option to run 5 different commands (ls, who, ping etc) and
on exiting the script, echo the user’s name, user inputs (you will want to save
these as varialbes and how many choices the user made).
Comments MUST be included in the script! Your script should be easy for anyone to run
without the need of prompting from you, the developer.
Email a copy and leave an executable copy in the appropriate homework directory.
Remember, by reading your comments I should be able to see exactly what your script is
doing (or suppose to do). Why use comments? Comments force you to think through the
scripting process. Scripting could be considered a mechanical process of converting your
comments into UNIX commands.

#! /bin/csh
echo "Enter the month date"
set a = ($<)
set date = `date | cut -f 3 -d ' '` #date command cut to the date
if ( $a == $date ) then #if correct date entered
echo "What's your first name ?" #ask for name
set b = $< #setting variable
echo "Hello $b "
else
echo "I'm sorry that is not correct."
exit 0
endif
@ h = 0 # declaring the variables
@ i = 0
@ j = 0
@ k = 0
@ l = 0
@ z = 0
set e = /home/fall_05/user-name/HW/11-22 #path
set f = $e/menu #set variable for menu
while (1)
top:
clear
cat $f #cat menu
echo -n "Enter your choice "
set a = $< #set variable for choice
#set z = 1 # the counter wouldn't work until I defined the
variable
switch ( $a )
case [aA]: #case a
@ h = 1 # h is equal to 1 this sets the variable
for listing inputs
ls #command
@ z = $z + 1 #The counter
sleep 2
goto top
case [bB]:
@ i = 1
who
@ z = $z + 1
sleep 2
goto top
case [cC]:
@ j = 1 last |grep $b |wc -l
@ z = $z + 1
sleep 2
goto top
case [dD]:
@ k = 1
finger
@ z = $z + 1
sleep 2
goto top
case [eE]:
@ l = 1
@ z = $z + 1
echo "Thank you $b for entering $z choices."
echo "You ran the following commands "
if ( $h == 1 ) then
echo "ls " # if h is equal to 1 then echo ls and so
forth following down the line
if ( $i == 1 ) then
echo "who "
endif
if ( $j == 1 ) then
echo "last "
endif
if ( $k == 1 ) then
echo "finger "
endif
if ( $l == 1 ) then
echo "exit "
endif
exit 0
endsw # end switch
end # end while statement #! /bin/csh
#case switch
echo -n "Please enter your name... " #prompts user for name
set name=$< #sets user input to variable
@ i = 0 #counter begins at zero
@ a = 0
@ new = 0
@ f = 0
@ c = 0
@ n = 0
@ z = 0
@ dir = 0
@ address = 0
while (1) #while true
echo $i #counter
clear #clear screen
top: #place holder for goto
cat options #look at option file
@ i = $i + 1 #increment counter at each pass
echo options #echo options to screen
echo -n "Enter your option... " #prompts user for selection
set z=$< #sets user input to variable
switch ($z)
echo "" #inserts a blank line
case [aA] #chosen if user selects option aA
clear
echo -n "Which file would you like to copy? " #prompts user for input
set a=$< #sets user input to variable
echo -n "What is the new filename? " #prompts user for input
set new=$< #sets user input to variable
cp $a $new #copies one file to another
echo -n file $a was copied to $new #displays the file names
echo "" #inserts a blank line
goto top #return to the top and start over
case [bB] #chosen if user selects option bB
clear
echo -n "Which file would you like displayed? " #prompts user for file n
ame
set f=$< #sets user input to variable
if (-e $f) then #if the file exists then
cat $f #cat the file
endif #end if statement
echo "" #inserts a blank line
echo -n "Which column would you like to cut? " #prompts user for column
to cut set c=$< #sets user input to variable
cat $f|tr -s ' ' | cut -f $c -d ' '>duh2 #looks at file, removes spaces,
cuts field and saves as new file
echo "" #inserts a blank line
cat duh2 #look at the edited file
echo "" #inserts a blank line
goto top #return to the top and start over
case [cC] #chosen if user selects option cC
clear
echo -n "Enter the name of the file that you'd like to look at. " #promp
ts user for input
echo "" #inserts a blank line
set f=$< #sets user input to variable
cat $f #performs cat on user input
goto top #return to the top and start over
case [dD] #chosen if user selects option dD
clear #clear screen
loop: #place holder
cat options1 #look at the options1 file for additional option
s
echo options1 #echo the options to the screen
echo -n "Which function would you like to perform? "
set i=$< #sets user input to variable
switch ($i)
case [1]
clear
echo -n "Which directory would you like to look at? " #ls comman
d, prompts for directory
set dir=$< #sets user input to variable.
ls -alF $dir #performs ls on directory from user input
echo "" #inserts a blank line
goto loop #go to loop placeholder
case [2]
clear
echo "" #inserts a blank line
who #performs who
echo "" #inserts a blank line
goto loop #go to loop placeholder
case [3]
echo "" #inserts a blank line
echo -n "What is the address to ping? " #prompts user for addres
s to ping
set address=$< #sets user input to variable
ping $address -c 1 #performs ping, on user input, for one c
ount
echo "" #inserts a blank line goto loop #go to placeholder
case [4]
clear
echo "Who would you like to 'finger'?" #prompts user for name
set n=$< #sets user input to variable
finger $n #performs finger on variable
echo "" #inserts a blank line
goto loop #go to placeholder
case [5]
goto top #go to placeholder
endsw #end switch
case [eE] #chosen if user selects option eE
echo -n "You entered option e, to exit. Goodbye $name! $i options were c
hosen. Your inputs were $z, $a, $new, $f, $c, $n, $dir, $address. " #ec
ho the user's name, how many choices were made and what the inputs were.
#displays which option was entered and exits the
echo "" #inserts a blank line
exit #exit
breaksw #ends
endsw #end the switch
end #end the while statement

[Chris4610]

I pray that someone can help me with the script, I desperately need help for this and ty to anyone in advance.

[uglyboy]

#! /bin/csh 
echo "Enter the month date" 
set a = ($<) 
set date = `date | cut -f 3 -d ' '` #date command cut to the date 
if ( $a == $date ) then #if correct date entered 
echo "What's your first name ?" #ask for name 
set b = $< #setting variable 
echo "Hello $b " 
else 
echo "I'm sorry that is not correct." 
exit 0 
endif 
@ h = 0 # declaring the variables 
@ i = 0 
@ j = 0 
@ k = 0 
@ l = 0 
@ z = 0 
set e = /home/fall_05/user-name/HW/11-22 #path 
set f = $e/menu #set variable for menu 
while (1) 
top: 
clear 
cat $f #cat menu 
echo -n "Enter your choice " 
set a = $< #set variable for choice 
#set z = 1 # the counter wouldn't work until I defined the 
variable 
switch ( $a ) 
case [aA]: #case a 
@ h = 1 # h is equal to 1 this sets the variable 
for listing inputs 
ls #command 
@ z = $z + 1 #The counter 
sleep 2 
goto top 
case [bB]: 
@ i = 1 
who 
@ z = $z + 1 
sleep 2 
goto top 
case [cC]: 
@ j = 1 last |grep $b |wc -l 
@ z = $z + 1 
sleep 2 
goto top 
case [dD]: 
@ k = 1 
finger 
@ z = $z + 1 
sleep 2 
goto top 
case [eE]: 
@ l = 1 
@ z = $z + 1 
echo "Thank you $b for entering $z choices." 
echo "You ran the following commands " 
if ( $h == 1 ) then 
echo "ls " # if h is equal to 1 then echo ls and so 
forth following down the line 
if ( $i == 1 ) then 
echo "who " 
endif 
if ( $j == 1 ) then 
echo "last " 
endif 
if ( $k == 1 ) then 
echo "finger " 
endif 
if ( $l == 1 ) then 
echo "exit " 
endif 
exit 0 
endsw # end switch 
end # end while statement #! /bin/csh 
#case switch 
echo -n "Please enter your name... " #prompts user for name 
set name=$< #sets user input to variable 
@ i = 0 #counter begins at zero 
@ a = 0 
@ new = 0 
@ f = 0 
@ c = 0 
@ n = 0 
@ z = 0 
@ dir = 0 
@ address = 0 
while (1) #while true 
echo $i #counter 
clear #clear screen 
top: #place holder for goto 
cat options #look at option file 
@ i = $i + 1 #increment counter at each pass 
echo options #echo options to screen 
echo -n "Enter your option... " #prompts user for selection 
set z=$< #sets user input to variable 
switch ($z) 
echo "" #inserts a blank line 
case [aA] #chosen if user selects option aA 
clear 
echo -n "Which file would you like to copy? " #prompts user for input 
set a=$< #sets user input to variable 
echo -n "What is the new filename? " #prompts user for input 
set new=$< #sets user input to variable 
cp $a $new #copies one file to another 
echo -n file $a was copied to $new #displays the file names 
echo "" #inserts a blank line 
goto top #return to the top and start over 
case [bB] #chosen if user selects option bB 
clear 
echo -n "Which file would you like displayed? " #prompts user for file n 
ame 
set f=$< #sets user input to variable 
if (-e $f) then #if the file exists then 
cat $f #cat the file 
endif #end if statement 
echo "" #inserts a blank line 
echo -n "Which column would you like to cut? " #prompts user for column 
to cut set c=$< #sets user input to variable 
cat $f|tr -s ' ' | cut -f $c -d ' '>duh2 #looks at file, removes spaces, 
cuts field and saves as new file 
echo "" #inserts a blank line 
cat duh2 #look at the edited file 
echo "" #inserts a blank line 
goto top #return to the top and start over 
case [cC] #chosen if user selects option cC 
clear 
echo -n "Enter the name of the file that you'd like to look at. " #promp 
ts user for input 
echo "" #inserts a blank line 
set f=$< #sets user input to variable 
cat $f #performs cat on user input 
goto top #return to the top and start over 
case [dD] #chosen if user selects option dD 
clear #clear screen 
loop: #place holder 
cat options1 #look at the options1 file for additional option 
s 
echo options1 #echo the options to the screen 
echo -n "Which function would you like to perform? " 
set i=$< #sets user input to variable 
switch ($i) 
case [1] 
clear 
echo -n "Which directory would you like to look at? " #ls comman 
d, prompts for directory 
set dir=$< #sets user input to variable. 
ls -alF $dir #performs ls on directory from user input 
echo "" #inserts a blank line 
goto loop #go to loop placeholder 
case [2] 
clear 
echo "" #inserts a blank line 
who #performs who 
echo "" #inserts a blank line 
goto loop #go to loop placeholder 
case [3] 
echo "" #inserts a blank line 
echo -n "What is the address to ping? " #prompts user for addres 
s to ping 
set address=$< #sets user input to variable 
ping $address -c 1 #performs ping, on user input, for one c 
ount 
echo "" #inserts a blank line goto loop #go to placeholder 
case [4] 
clear 
echo "Who would you like to 'finger'?" #prompts user for name 
set n=$< #sets user input to variable 
finger $n #performs finger on variable 
echo "" #inserts a blank line 
goto loop #go to placeholder 
case [5] 
goto top #go to placeholder 
endsw #end switch 
case [eE] #chosen if user selects option eE 
echo -n "You entered option e, to exit. Goodbye $name! $i options were c 
hosen. Your inputs were $z, $a, $new, $f, $c, $n, $dir, $address. " #ec 
ho the user's name, how many choices were made and what the inputs were. 
#displays which option was entered and exits the 
echo "" #inserts a blank line 
exit #exit 
breaksw #ends 
endsw #end the switch 
end #end the while statement

[Chris4610]

Hey Uglyboy,

Thank you for your help with my other issue, I have another that I have actually tried doing myself but I swear this is like Spanish to me. Below is what i'm being asked to do and below that will be what i've attempted so far. I have been able to get a couple of the things being asked to work alone but combing them into a whole script has been a problem.

Your case and switch script should:
-request a user name,
-request 8 numbers and ask the user if they are to be added or sorted (both need to
work!) OR request 8 names (1
st
and last) and sort them by the second field (check
the hints and tips sheet for multi part user input),
-multiply two numbers from user input,
- give the user the choice of running; ‘who’, ‘w’ or ‘finger’ and echo only the first
and third columns to the screen (save this also for exit echo),
- have a conditional ‘while’ statement,
- track the number of choices the users makes (use a counter),
- have at least 2 if statements,
- include an option that will add from a start number and end at another number
using user input for all numbers including the increment number (sound familiar?).
Neatly (review echo in your book if necessary and experiment with formatting)
echo all the results (you should have them all saved as variables) and user input back to
the screen in a user friendly format (can you say ‘easy to read’?). Output on the screen
will show what commands the user executed, the user’s name, other user inputs (name,
any numbers etc), the sum of added numbers, the product of multiplied numbers and how
many choices the user made.
Remember, by reading your comments I should be able to see exactly what your script is
doing at every key point of the script and comments count! Your script should be easy for
anyone to run without the need of prompting from you the developer
Also add a that use a nested switch in their script!

#!/bin/csh
head -20 sorted_second | tail -8
sort -t"," -k 2 sorted_second

I was trying to get the first 8 names from my file & sort it by the 2nd field only could not get it.

#!/bin/bash
num=2
ps=3
ans=$((num*ps))
echo ${ans}

Here I was able to get it to multiply 2 numbers as asked but have not been able to include it properly into the script. I really could use help in this regard and would be greatly appreciated.

Ty,

Chris

[uglyboy]

#!bin/bash
echo -n " Please Enter a Username : "
read username 
if [ -z "$username" ]; then
    echo "No Username!"
    exit
fi
echo "Hello $username"

#As For Sum
#!/bin/bash
num=2
ps=3

ans=$((num+ps))
echo "The Addition of $num and $ps is $ans"

[Chris4610]

Awesome tyvm is there any chance you can help me with the rest that is being asked & I promise i'll find some way to show appreciation for this because it's bailing me out of a huge jam.

Ty,

Chris

[uglyboy]

Awesome tyvm is there any chance you can help me with the rest that is being asked & I promise i'll find some way to show appreciation for this because it's bailing me out of a huge jam.

Ty,

Chris

There are a couple of sites which you can visit to learn.

There are tougher questions which I dont even hav answer to

[atreyu]

Hi,

This appears to be a homework question, and asking for help on them is against Forum Rules.

That does not mean that we cannot help you with an isolated issue, though (versus doing your homework for you outright). If you have a specific problem with one aspect (programming or otherwise), please focus on that issue, and please indicate what you have tried and any errors generated when run. We will attempt to give you pointers and references for where you can learn about such things.

The man pages that come with all Linux distros is usually the best place to start (and much of what you ask is covered there). Properly crafted google searches will also avail you. Also check your init scripts dir (e.g. /etc/init.d/) for examples of scripting.

For starters:

man bash

man csh

[Chris4610]

Below is something that seems simple but it isn't, I listed what i have to do and below that is my attempt. It runs but it just doesn't seem right and honestly this is my first time experiencing foreach scripts...please help.


1 - Use a foreach script to list all the files in a directory (user input
needed – what dir to list) and echo the number of files in those directories.
** 2 points **
2 - Use a foreach script to change the case of the names (first, last or both
names) in your ‘friends’ database (you will need to cut out all the extra info).
** 3 points **
3 - Use a combination of scripting skills that will send user input (asked from the
command line) into a file that is [the file] then processed by the foreach script as
part of your script. The foreach will manipulate the file somehow – your choice
of manipulation!

#! /bin/csh

foreach i (HW-Oct29 HW-Nov12 HW-Nov13 week04 week05)
#the above line assigns text files to var 'i' one at a time

echo $i file #echo each variable followed by the word 'file'

end #end the foreach loop

[Cancerous]

Any command that will contain spaces needs to have the content wrapped in quotes, otherwise it reads them as seperate commands.

Just change this line so it looks like this.

echo "$i file"

Also, homework is against the forum rules. So we shouldn't be solving it for you, just pointing you in the right direction.