CS131 Week 3

19 Questions

Which graphical editor is the default text editor for Gnome?

gedit

Which graphical editor is the graphical version of vim?

gvim

Which graphical editor is a Microsoft Word alternative?

AbiWord

Which file contains the user account information for your system?

/etc/passwd

What does the 'alias' command do in the previous example?

Replaces a simpler word for the command given

What is the purpose of the '.bashrc' file?

To configure Bash to personal needs

What is the purpose of the 'sudo' command in Linux?

To switch to root-level access

Which character is used to reference the contents of a variable in a shell script?

What is the purpose of the 'export' command in a shell script?

To make a variable available to child processes

What is the difference between 'echo `pwd`' and 'echo "pwd"'?

The first prints the string 'pwd', the second prints the current working directory

What is the purpose of the 'exit' function in a C program?

To terminate the program

According to the text, what is the purpose of the 'sudo' command?

To execute specific commands with elevated privileges

What is the main difference between the 'sudo' and 'su' commands?

'sudo' is used to execute specific commands with elevated privileges, while 'su' is used to switch to another user's shell session

If a user 'alice' creates a file named 'linux_intro.txt' using 'vi' in their home directory, who will be assigned as the owner of the file?

The user 'alice'

Which command can be used to change the group that owns a file or directory?

chgrp

Which command is used to create a new group in Linux?

groupadd

True or False: Chown can only change ownership of a file, not a directory.

False

Why does Linux use groups?

For security reasons

Which command is used to add a user to a particular group in Linux?

usermod

Study Notes

Default Text Editor

Gnome's default text editor is Gedit.

Graphical Editors

Gvim is the graphical version of Vim.
LibreOffice is a Microsoft Word alternative.

User Account Information

The /etc/passwd file contains user account information for the system.

Bash Commands

The alias command is used to create a shortcut for a command or a set of commands.
The .bashrc file is used to store Bash shell configurations and settings.

Sudo Command

The sudo command allows a user to execute a command with superuser privileges.
The main purpose of sudo is to provide temporary elevated privileges to a user.

Shell Scripting

The dollar sign $ is used to reference the contents of a variable in a shell script.
The export command is used to set an environment variable in a shell script.

Echo Command

echo pwd`` outputs the current working directory.
echo "pwd" outputs the string "pwd".

C Programming

The exit function is used to terminate a C program.

Linux File Management

When a user creates a file, they are assigned as the owner of the file.
The chgrp command is used to change the group that owns a file or directory.
The groupadd command is used to create a new group in Linux.
Chown can be used to change ownership of both files and directories.
Linux uses groups to manage file permissions and access control.
The usermod command is used to add a user to a particular group in Linux.

Test your knowledge of configuring Bash in UNIX/Linux and learn about the different login files and their functions. Determine if it is true or false that configuring Bash to your personal needs is a good reason to use UNIX/Linux.

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