System Commands, OPPE 1

May 2023 term, Set 2

Quiz Space

MusicOpen the study music controls.

CalculatorOpen the calculatorLearning mode

Question 1

+15−0Instructions

QuestionTest casesSolution

Write a bash script that adds the total size of only PDF files present in a directory. Assume that the directory only contains files and no subdirectories.

Hint: Use ls -l to get the file size information

Code Editor

Bash

−14+

ResetNot submitted

#!/usr/bin/env bash
# Write your script here

#!/usr/bin/env bash # Write your script here

Run sample testsSubmit

Submit this paper?

You cannot change your answers after submitting.

Answered

0

Not answered

1

Marked for review

0

Answered & marked for review

0

Not visited

2

Keep goingSubmit paper

Instructions

The palette shows the status of every question. Pick a number to go straight to it.

Answered

0

Not answered

1

Marked for review

0

Answered & marked for review

0

Not visited

2

• Save & Next moves to the next question. Answers are saved as you go.
• Mark for Review & Next flags the question to come back to. A flagged answer still counts.
• Clear Response removes your answer to the question on screen.
• The ← and → keys move to the previous and next question.

Write a bash script that adds the total size of only PDF files present in a directory. Assume that the directory only contains files and no subdirectories. Hint: Use `ls -l` to get the file size information A `dpkg.log` file contains a record of applications installed, removed, upgrade and purge over a period of time. Write a shell script to report the total number of instances when packages are installed, removed, upgraded and purged. A sample of the log file is as follows. Note: Use Installed, update, remove and purge as the keywords for pattern matching. ```bash 2022-05-05 15:55:14 startup packages remove 2022-05-05 15:55:14 status installed linux-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 remove linux-virtual:amd64 4.15.0.176.165 <none> 2022-05-05 15:55:14 status half-configured linux-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 status half-installed linux-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 status config-files linux-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 status config-files linux-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 status config-files linux-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 status not-installed linux-virtual:amd64 <none> 2022-05-05 15:55:14 status installed linux-headers-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 remove linux-headers-virtual:amd64 4.15.0.176.165 <none> 2022-05-05 15:55:14 status half-configured linux-headers-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:14 status half-installed linux-headers-virtual:amd64 4.15.0.176.165 2022-05-05 15:55:15 status config-files linux-image-4.15.0-176-generic:amd64 4.15.0-176.185 2022-05-05 15:55:15 status config-files linux-image-4.15.0-176-generic:amd64 4.15.0-176.185 2022-05-05 15:55:15 status installed linux-modules-4.15.0-176-generic:amd64 4.15.0-176.185 2022-05-05 15:55:15 remove linux-modules-4.15.0-176-generic:amd64 4.15.0-176.185 <none> 2022-05-05 15:55:15 status half-configured linux-modules-4.15.0-176-generic:amd64 4.15.0-176.185 2022-05-05 15:55:15 status half-installed linux-modules-4.15.0-176-generic:amd64 4.15.0-176.185 2022-05-05 15:55:15 status config-files linux-modules-4.15.0-176-generic:amd64 4.15.0-176.185 2022-05-05 15:55:15 status config-files linux-modules-4.15.0-176-generic:amd64 4.15.0-176.185 2022-05-05 15:55:15 startup packages configure 2022-05-05 15:55:15 startup packages purge 2022-05-05 15:55:15 purge linux-image-4.15.0-176-generic:amd64 4.15.0-176.185 <none> 2022-05-05 15:55:15 status config-files linux-image-4.15.0-176-generic:amd64 4.15.0-176.185 2022-05-05 15:55:15 status config-files linux-image-4.15.0-176-generic:amd64 4.15.0-176.18 2022-05-05 15:55:17 startup packages remove 2022-05-05 15:55:17 status installed grub-pc:amd64 2.02-2ubuntu8.23 2022-05-05 15:55:17 status installed grub-gfxpayload-lists:amd64 0.7 2022-05-05 15:55:17 status installed grub2-common:amd64 2.02-2ubuntu8.23 2022-05-05 15:55:17 status installed grub-pc-bin:amd64 2.02-2ubuntu8.23 2022-05-05 15:55:17 status installed grub-common:amd64 2.02-2ubuntu8.23 2022-05-05 15:55:17 status installed grub-legacy-ec2:all 1:1 2022-05-05 15:55:17 remove grub-legacy-ec2:all 1:1 <none> 2022-05-05 15:55:17 status half-configured grub-legacy-ec2:all 1:1 ``` Create a file structure as shown below; the commands should not output anything. ```text /potato_recipes/ ├── french_fries │ ├── ingredients.txt │ └── procedure.txt ├── frites -> french_fries/ └── potato_wedges ├── ingredients.txt └── procedure.txt ``` - `potato_recipes` is a directory present in the root directory `/`. - `french_fries` and `potato_wedges` are the directories present inside the directory `potato_recipes`. - `frites` is a symbolic link to the directory `french_fries` - `ingredients.txt` inside the directory `potato_wedges` is a hard link to the file `ingredients.txt` inside the directory `french_fries` - `procedure.txt` are the text file present inside `french_fries` and `potato_wedges`