Linux File Permissions – Full Quiz
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This quiz contains 20 questions covering Linux file permissions.
It helps DevOps engineers understand security and access control on Linux systems.
Which permission allows reading a file?
The r (read) permission allows opening and viewing the contents of a file.
Which permission allows modifying a file?
The w (write) permission grants the ability to modify, overwrite, or delete a file's content.
Which permission allows executing a file?
The x (execute) permission allows a file to be run as a program or script.
In file permissions, what does the first character - indicate?
In the ls -l output, a hyphen - as the first character indicates a standard file.
What does the permission string drwxr-xr-x represent?
The leading d indicates that the item is a directory.
Which numeric value represents read permission?
In the octal permission notation, 4 stands for read permission.
Which numeric value represents write permission?
In the octal permission notation, 2 stands for write permission.
Which numeric value represents execute permission?
In the octal permission notation, 1 stands for execute permission.
What does chmod 600 file.txt mean?
600 means User: rw- (4+2=6), Group: --- (0), Others: --- (0).
What does chmod 755 file.sh allow?
755 means User: rwx (7), Group: r-x (5), Others: r-x (5).
Which command changes file ownership?
The chown (change owner) command is used to change the file owner and group.
Which command changes only the group ownership?
chgrp is specifically designed to change the group ownership of a file or directory.
Which option with chown applies ownership recursively?
The -R flag applies the ownership change to the directory and all files/subdirectories inside it.
Which file permission allows entering a directory?
The execute (x) permission on a directory is required to cd into it or access files within it.
Which permission setting prevents others from accessing a file?
600 gives read/write to the owner and no permissions (0) to group and others, effectively blocking access.
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