#1
In Linux, what command is used to change the ownership of a file?
chown
ExplanationChange ownership of a file.
#2
What does the 'r' permission in Linux file permissions represent?
Read
ExplanationAllows reading of a file.
#3
Which command is used to change the group ownership of a file in Linux?
chgrp
ExplanationChange group ownership of a file.
#4
In Linux, what is the purpose of the 'sudo' command?
Switches to the superuser account
ExplanationSwitch to superuser account.
#5
What is the purpose of the 'chsh' command in Linux?
Changes the shell for a user
ExplanationChange user's shell.
#6
Which command is used to display the Access Control List (ACL) of a file in Linux?
#7
What is the significance of the 'sticky bit' in Linux file permissions?
Prevents users from deleting others' files in a directory
ExplanationPrevent deletion of others' files in a directory.
#8
Which command is used to remove read permission for the group from a file in Linux?
chmod g-r
ExplanationRemove read permission for group from a file.
#9
In Linux, what is the octal representation for the read, write, and execute permissions for the owner?
421
ExplanationOwner permissions: read(4), write(2), execute(1).
#10
What is the purpose of the 'umask' command in Linux?
Specifies the default file creation mask
ExplanationSpecify default file creation mask.
#11
Which command is used to grant execute permission to a file in Linux?
chmod +x
ExplanationGrant execute permission to a file.
#12
What does the 'setuid' permission do in Linux?
Sets the user ID of the owner to the effective user ID of the program
ExplanationSet user ID of owner to program's effective user ID.
#13
What is the purpose of the 'default ACL' in Linux?
Sets default permissions for new files and directories in a directory
ExplanationSet default permissions for new files and directories.
#14
Which command is used to give execute permission to all users for a directory and its subdirectories in Linux?
chmod -R +x
ExplanationGrant execute permission recursively.
#15
What does the 'setgid' permission do in Linux?
Sets the group ID of the owner to the effective group ID of the program
ExplanationSet group ID of owner to program's effective group ID.