1) Is "Simple Script" a comment? If not, what is the meaning of it or why we use it?
2) Is "#!/bin/bash" a comment? If not, what is the meaning of it or why we use it in first line?
Homework Answers
1. Is #Simple Sript is a comment ? (True its a comment)
2. Is "#!/bin/bash" a comment?
No, Its not a comment,
There are lot of shell in UNIX , It means that the script
should always be run with bash shell, rather than
another shell
Add Answer to:
1) Is "Simple Script" a comment? If not, what is the meaning of
it or why...
1. Write 4 simple shell scripts. Each question will ask you to write one or more...
1. Write 4 simple shell scripts. Each question will ask you to write one or more command lines to solve a problem. Put the command(s) from each problem into a file named problem1.sh, problem2.sh Note that if you want your script to be interpreted by bash, each file should start with the line: #!/bin/bash and will have one (or more, as needed) commands following it. To execute each script in bash, so you can determine if it is working or...
I am having trouble on what exactly to write so I can make the script work,...
I am having trouble on what exactly to write so I can make the script work, can someone show how to properly do it? Use the vi editor to enter the following script (name this file testscript): #!/bin/bash #script to demonstrate : reading arguments from a command line & # interactively from within script # selection (if… then… else…. fi) # iteration (for loop) # USE FILES ENTERED ON THE COMMAND LINE echo The script you are running is $0...
LUNIX (Please Label) Exit vi (:q) and from the command line, type viscript4.sh. For this script,...
LUNIX (Please Label) Exit vi (:q) and from the command line, type viscript4.sh. For this script, we will iterate through all files in the current directory print out their name using the for loop. Example (do not type yet): foriin*;do …;done where the…does some operation on$I, which stands for the current file. To do this, enter the following in your script4.sh file: #!/bin/bash for i in *; do echo $i done Once the above works, change the for loop to...
Objective : Write a C Shell script which copies all files(*.java and *.class) from your home dire...
Objective : Write a C Shell script which copies all files(*.java and *.class) from your home directory to a new one, and Analyze the new directory information such as number of files, user permissions, and disk usage. Sample Output: << CS Directory Analysis >> Date: ============================================================ Current Directory: /home/tomss New Directory Created : /home/tomss/pgm01 File information Total Number of files : 22 files Directory files: 0 files Plain text files: 10 files File have read permissions: 3 files File have...
Write a script using simple shell commands. The script takes a command line argument that specifies...
Write a script using simple shell commands. The script takes a command line argument that specifies a directory dir. The script first changes directory to dir, then prints the following in sequence: (a) A line starting “Current date and time: ”. Then on the same line, the current time and date. (b) A line starting “Current directory is : ”. Then, on the same line, the absolute pathname of the current working directory. (c) An empty line (d) The line...
1. The script requires 3 filenames as arguments, e.g., ./script1 file1 file2 file3. Which files are input...
1. The script requires 3 filenames as arguments, e.g., ./script1 file1 file2 file3. Which files are input files and which are output files? 2. Inside the while-loop, why does variable “$line” have to be enclosed by double quotes? $cat script1 #!/bin/bash exec 3<$1 exec 4<$2 exec 5>$3 while read line <&3 do echo “$line” >&5 done while read line <&4 do echo “$line” >&5 done
Copy/Paste your script from 5b here. 4. Let's look at a more complicated script executable. a....
Copy/Paste your script from 5b here.
4. Let's look at a more complicated script executable. a. Write the following as script6.sh and change its permissions to count for num in d do if num eq 100 then count (count+1) done echo The number 10 was found $count times What is the output? Run the script as ./script6.sh 10 20 30 10 40 20 50 10 60 <enter Summarize what the script does r using the read command. The following script...
Exercise 1: Write a shell script that loops through the /etc/passwd file one line at a...
Exercise 1: Write a shell script that loops through the /etc/passwd file one line at a time. Prepend each line with a line number followed by a colon and then a space. Example output: 1: root:x:0:0:root:/root:/bin/bash 2: daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin 3: bin:x:2:2:bin:/bin:/usr/sbin/nologin 4: sys:x:3:3:sys:/dev:/usr/sbin/nologin Exercise 2: Write a shell script that asks the user for the number of lines they would like to display from the /etc/passwd file and display those lines. Example output: How many lines of /etc/passwd would you like...
Please write a BASH Script in LINUX that... 1. is actually executable 2. has a comment...
Please write a BASH Script in LINUX that... 1. is actually executable 2. has a comment to tell us what you did, why and how. 3. allows a user to enter their name and a number between 1 than 100 (this must be prompted so the user knows what to do) 4. creates a random number between 1 and 100 for you to guess. The command to create a random number is shown below. (if you find a better one...use...
Write a SHELL SCRIPT: Write a simple shell that is similar to what we have discussed...
Write a SHELL SCRIPT:
Write a simple shell that is similar to what we have discussed in class. while (1) {//repeat forever type_prompt();//display prompt on screen read_command (command, parameters);//read input from terminal if (fork() != theta)//parent wait (NULL);//wait for child else{execve (command, parameters, theta);//execute command}} but contains enough code that it actually works so you can test it. For simplicity, you may assume that all commands are in the directory/bin.
Copy/Paste your script from 5b here.
4. Let's look at a more complicated script executable. a. Write the following as script6.sh and change its permissions to count for num in d do if num eq 100 then count (count+1) done echo The number 10 was found $count times What is the output? Run the script as ./script6.sh 10 20 30 10 40 20 50 10 60 <enter Summarize what the script does r using the read command. The following script...
Write a SHELL SCRIPT:
Write a simple shell that is similar to what we have discussed in class. while (1) {//repeat forever type_prompt();//display prompt on screen read_command (command, parameters);//read input from terminal if (fork() != theta)//parent wait (NULL);//wait for child else{execve (command, parameters, theta);//execute command}} but contains enough code that it actually works so you can test it. For simplicity, you may assume that all commands are in the directory/bin.
Most questions answered within 3 hours.
-
What is a machine? What are some mechanical advantages to
using a machine? How do you...
asked 1 minute ago -
A 1.07 10-3 µF capacitor has an initial charge of 0.100 C. When
a resistor is...
asked 7 minutes ago -
A local food delivery company “quiksnak” wants to improve its
process to provide better customer service....
asked 3 minutes ago -
A building will require capital improvements of $1 million in
five years. Assuming monthly cash flow...
asked 11 minutes ago -
A $100,000 bond payable is issued on June 1, 20X1 at 106.
The bond comes due...
asked 16 minutes ago -
A 2.3 mm -diameter sphere is charged to -4.4 nC . An electron
fired directly at...
asked 19 minutes ago -
A rifle with a mass of 78 kg fires a bullet with a mass of 36...
asked 35 minutes ago -
Question 10
Applied Materials depreciates buildings and improvements over
useful lives of 5-50 years.
a.
True....
asked 56 minutes ago -
A 10.0 mL sample of 0.25 M NaOH(aq) is titrated with 40.0 mL of
0.10 M...
asked 56 minutes ago -
How
can we prove that a flow is incompressible if the velocity field is
known?
asked 59 minutes ago -
It is sometimes argued that understanding people's existing
activities does not really help to design future...
asked 1 hour ago -
what is the angular velocity of tje moon in its orbut ( orbit
period is 28)?
asked 1 hour ago