Shell Scripting Basics

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Questions and Answers

Match the Bash concepts with their correct descriptions:

Arguments = Used to pass input to scripts Conditions = Control the flow based on tests Switch Case = Handle multiple choices Arrays = Store multiple values in a single variable

Match the Bash syntax with its purpose:

$1, $2 = Refer to positional parameters if [[ condition ]] = Start a conditional block case $variable in = Initiate a switch statement echo = Output text to the console

Match the condition check with its outcome:

if [[ -z ${name} ]] = Check if variable 'name' is empty if [[ some_test ]] = Execute if some condition is true case $car in = Evaluate different car brand patterns [*] = Default case in switch statement

Match the UNIX directories with their descriptions:

/ = Root directory, the top of the file system hierarchy bin/ = Contains executable programs dev/ = Contains device files for hardware access etc/ = Holds configuration files for the system Signup and view all the answers

Match the array declaration with its correct syntax:

my_array=("value 1" "value 2") = Declare an array with two values echo ${my_array} = Print the elements of an array my_array[0] = Access the first element in an array my_array+=("value 3") = Add a new value to the array Signup and view all the answers

Match the shell script principles with their explanations:

Documenting = Use # for comments in scripts Set shell = First line in a script should be #!/bin/bash Modular programming = Follow KISS and UNIX philosophy Clean coding = Check if parameters and file availability are correct Signup and view all the answers

Match the commands with their expected outcomes:

read -p "What is your name?" = Prompt user for input echo "Hi there ${name}" = Greet the user with their name echo -n "${car} is an unknown brand." = Inform about an unrecognized car brand echo –n "${car}’s factory is in USA." = Output the factory location for Tesla Signup and view all the answers

Match the command outputs with their functions in the example script:

netstat -nat = Lists all network connections grep -E 'LISTEN' = Filters active ports that are listening fuser -n tcp $PORT = Finds processes using the specified port ps -f -q $PID = Displays detailed information about the process Signup and view all the answers

Match the scripting control structures with their use cases:

If statement = Conditionally execute code Switch case = Select between several alternatives For loop = Iterate over a sequence While loop = Repeat while a condition is true Signup and view all the answers

Match the elements of the UNIX file system hierarchy with their roles:

Root (/) = Top-level of the filesystem home/ = User files and directories lib/ = Contains essential libraries bin/ = Storage for binary executables Signup and view all the answers

Match the syntax with its execution result:

pattern_1) = Define a case action in switch ;; = End a case statement -n = Check if variable is not empty echo "Please enter your name!" = Request name input if empty Signup and view all the answers

Match the components of the shell script with their purposes:

for PORT in ... = Iterates over each listening port echo 'INFORMATION FOR OPEN PORT $PORT' = Outputs information for the current port cut -f2-4 -d':' = Extracts specific fields from data sort -nu = Sorts the output uniquely Signup and view all the answers

Match the command structure with its example:

if [[ -z condition ]] = Checks if a variable is empty read -p "Prompt" = Gets user input with a message case variable in = Starts a selection statement my_array+=("new value") = Adds an element to an array Signup and view all the answers

Match the descriptions of UNIX directory contents:

bin/ = Executables and binaries dev/ = Device files for system interaction etc/ = System and configuration settings home/ = Personal directories for users Signup and view all the answers

Match the script behavior with its expected results:

Running the script as superuser = Access to all network ports Using 'sed -e 's/://g'' = Removes colons from the port output Employing 'sort -nu' = Eliminates duplicate values Echo command in loop = Displays status information continuously Signup and view all the answers

Match the key programming concepts with their functions in shell scripting:

KISS = Keep it simple, stupid UNIX philosophy = Follow principles of modularity and clarity Parameter checking = Ensure expected input is provided Commenting = Documenting code for clarity and maintenance Signup and view all the answers

Match the following Bash loop types with their descriptions:

For loop = Iterates over a list of items While loop = Continues executing as long as a condition is true Until loop = Executes until a condition becomes true Do-while loop = Executes at least once before checking the condition Signup and view all the answers

Match the following Bash commands with their purposes:

echo = Displays a line of text read = Takes input from the user set -x = Activates debugging mode ((...)) = Performs arithmetic operations Signup and view all the answers

Match the following Bash constructs with their roles:

Function = Reusable block of code Variable = Stores a value for later use Command = An instruction to perform an action Script = A file containing a sequence of commands Signup and view all the answers

Match the following Bash function components with their descriptions:

function_name = The name of the function { ... } = Encloses the commands of the function hello = A call to the function echo 'Hello Function!' = Output statement in the function Signup and view all the answers

Match the following Bash syntax elements with their functions:

$users = Holds a list of user names ${list} = Used to reference a variable counter=1 = Initializes a counter variable -z ${name} = Checks if a variable is empty Signup and view all the answers

Match the following debugging techniques with their descriptions:

set -x = Enables step-by-step command output bash -x ./my_script = Runs a script in debug mode echo = Outputs text to the terminal read -p = Prompts the user for input Signup and view all the answers

Match the following elements with their usage in shell scripting:

for var in ... = Starts a for loop while [[ ... ]] = Starts a while loop read -p ... = Collects user input ((counter++)) = Increments the counter variable Signup and view all the answers

Match the following keywords with their corresponding Bash loop types:

for = Repeats a block for each item in a list while = Checks a condition before each iteration until = Continues until a condition becomes true do = Indicates the start of a loop block Signup and view all the answers

Match the following file permissions with their description:

r = Read permission w = Write permission x = Execute permission <ul> <li>= No permission</li> </ul> Signup and view all the answers

Match the following directory paths with their purpose:

/tmp/ = Stores temporary files /usr/ = Holds files and installed programs system-wide /home/ = User home directories /var/ = Files that change frequently Signup and view all the answers

Match the types of files in UNIX with their symbols:

d = Directory <ul> <li>= Regular file l = Soft link c = Character device</li> </ul> Signup and view all the answers

Match the following command with its function:

ls -al = List all files in long format chmod = Change file permissions cp = Copy files mv = Move or rename files Signup and view all the answers

Match the following user statuses with their corresponding access levels:

Owner = Has full permissions Group = Limited permissions within a group Others = Minimal or no permissions Admin = Can modify all files Signup and view all the answers

Match the following file types with their attributes:

drwx = Directory with read, write, execute permissions -rw- = Regular file with read, write permissions lrwx = Symbolic link file dr-x = Directory with read and execute permissions only Signup and view all the answers

Match the following command usage with their corresponding command:

ls = List directory contents cat = Concatenate and display file content rm = Remove files or directories mkdir = Create a new directory Signup and view all the answers

Match the following file descriptions with their terms:

User = The individual who owns a file Group = A set of users that share permissions Inode = Structure that stores file metadata Directory = A container for files Signup and view all the answers

Match the following file permissions with their corresponding octal representation:

Read owner = 400 Write owner = 200 Execute owner = 100 Read group = 040 Signup and view all the answers

Match the following commands with their descriptions:

chmod 600 ~/.bashrc = Sets read/write permissions for owner ls -al ~/.bashrc = Shows file details in long format rm -fr /home/rakeller/ = Attempts to remove a directory ls -a = Displays hidden files Signup and view all the answers

Match the following types of users with their permissions:

Owner = Can read, write and execute if set to 700 Group = Can read if set to 040 Other = Can write if set to 002 Group member = Can execute if set to 010 Signup and view all the answers

Match the following examples of permissions with their meanings:

chmod 700 = Owner can read, write, execute chmod 600 = Owner can read, write, cannot execute chmod 400 = Owner can only read chmod 000 = No permissions granted Signup and view all the answers

Match the following terms with their definitions:

Remove command = Command to delete files and directories chmod = Command to change file permissions ls = Command to list directory contents Hidden files = Files that start with a dot (.) Signup and view all the answers

Match the characters used for file permissions with their descriptions: