Terminal Exercises

Help 19 / 25

Shell Scripts

Variables in shell scripts

Go to the folder exercise-data/alkanes/:

cd $TUTORIAL/exercise-data/alkanes/

In this directory, imagine you have a shell script called script.sh containing the following commands:

head -n $2 $1
tail -n $3 $1

While you are in the alkanes directory, you type the following command:

bash script.sh '*.pdb' 1 1

Which of the following outputs would you expect to see?

All of the lines between the first and the last lines of each file ending in .pdb in the alkanes directory

The first and the last line of each file ending in .pdb in the alkanes directory

The first and the last line of each file in the alkanes directory

An error because of the quotes around *.pdb

← Previous Next →

Introduction

Terminal Exercises

Navigating Files and Directories

Absolute vs relative paths

Absolute vs relative paths

Ls reading comprehension

Working With Files and Directories

Moving Files to a new folder

Renaming Files

Moving and Copying

List filenames matching a pattern

Pipes and Filters

Appending data

Piping commands together

Pipe construction

Which pipe?

Removing unneeded files

Loops

Write your own loop

Limiting sets of files

Saving to a file in a loop

Saving to a file in a loop - part 2

Shell Scripts

List unique species

Variables in shell scripts

Longest file with a given extension

Finding Things

Using grep

Tracking a species

Little women

Matching and subtracting

The end

The end

Which of the following outputs would you expect to see?

Memory usage

Import

Export

Reset your sandbox

Help