Exploring Linux File System and Permissions

This video tutorial, hosted by Tim Medina, covers the Linux filesystem, focusing on ownership and permissions. It explains the directory structure, key directories, and how they differ from Windows. The tutorial delves into file ownership, permissions, and how to change them using symbolic and octal formats. It also discusses the set UID bit and its security implications, along with techniques attackers might use to hide files. The session concludes with a brief overview of the next topic: installing software on Linux.

What is the Linux equivalent directory to Windows' 'Program Files'?

• /user/bin

• /etc

• /bin

• /dev

In Linux, how are hidden files designated?

• Using a special attribute

• Prefixing with a dot (.)

• Suffixing with a tilde (~)

• Placing in a hidden folder

Which directory contains essential system programs in Linux?

• /sbin

• /dev

• /bin

• /usr/bin

What directory is typically used for mounting external devices in Linux?

• /mount

• /mnt

• /external

• /media

What does the 'ls -l' command display?

• File types and permissions

• List of installed software

• Network configuration

• System logs

What does the 'chmod 754' command do to file permissions?

• Sets read, write, and execute for owner; read and execute for group; none for others

• Sets read, write, and execute for all

• Sets read and write for owner and group; execute for others

• Sets execute only for owner; read and write for group; none for others

What command sets a file's permissions to read-only for all users?

• chmod 555

• chmod 777

• chmod 444

• chmod 000

What is the purpose of the set UID bit in Linux?

• To set file permissions to default

• To encrypt file contents

• To allow a file to be executed as the file owner

• To prevent users from executing a file

Which command is used to find all files with set UID permissions?

• find / -perm -4000

• ls -l

• chmod 4000

• ls -a

How can attackers hide files in Linux?

• By deleting them

• By encrypting them

• By using misleading file names

• By compressing them