Zellis Interview Questions and Answers

SeLinux is a security module for Linux systems that enforces access control policies. Umask is a command that sets default permissions for new files and directories.

• SeLinux stands for Security-Enhanced Linux and provides access control security policies for Linux systems.

• It restricts access to files, directories, and processes based on defined security policies.

• Umask is a command that sets default permissions for new f...read more

LVM stands for Logical Volume Manager, used for managing disk storage in Linux. NTP stands for Network Time Protocol, used for time synchronization.

• LVM allows for dynamic resizing of logical volumes

• NTP ensures accurate time synchronization across networked devices

• LVM can be used to create snapshots for backups

• NTP servers can be configured to sync time with external time sources

Sticky bit is a permission in Unix systems that allows only the owner of a file to delete or rename it.

• Sticky bit is represented by a 't' in the permissions of a file or directory.

• It is commonly used on directories to prevent users from deleting files owned by other users.

• An example of sticky bit usage is on the /tmp directory in Unix systems.

DNS stands for Domain Name System, which translates domain names to IP addresses.

• DNS is like a phone book for the internet, translating human-readable domain names (like google.com) to IP addresses (like 172.217.3.206).

• It helps in routing internet traffic efficiently by directing requests to the correct servers.

• DNS records include A records (for IPv4 addresses), AAAA records (for IPv6 addresses), MX records (for mail s...read more