Merck Group Linux Administrator Interview Questions and Answers

Data backup can be taken using various methods such as cloud storage, external hard drives, and network-attached storage (NAS).

• Cloud storage: Use services like Google Drive, Dropbox, or Amazon S3 to store data remotely.

• External hard drives: Connect an external hard drive to the system and copy the data onto it.

• Network-attached storage (NAS): Set up a dedicated storage device on the network to backup data from multiple ...read more

An archive is a collection of historical records or documents.

• Archives are used to preserve and organize important documents and records.

• Archives can be physical or digital.

• Examples of archives include the National Archives and Records Administration and the Internet Archive.

• Archives can be used for research, historical preservation, and legal purposes.

A System Administrator can manage Https sites by configuring and maintaining the necessary security protocols and certificates.

• A System Administrator should have knowledge of SSL/TLS protocols and certificates.

• They should be able to configure web servers to support Https.

• They should regularly update and renew SSL certificates.

• They should monitor and troubleshoot any issues related to Https connections.

• They should ensur...read more

Samba is a free and open-source software that allows file and print sharing between Linux and Windows systems.

• Samba server enables Linux machines to share files and printers with Windows machines.

• It uses the SMB/CIFS protocol to provide seamless integration with Windows clients.

• Samba can also act as a domain controller, allowing Windows clients to authenticate against a Linux server.

• Samba can be configured through its ...read more

NFS secure server is a network file system that provides secure access to shared files over a network.

• NFS secure server uses Kerberos authentication to provide secure access to shared files.

• It encrypts the data being transferred over the network to prevent eavesdropping.

• It also uses Access Control Lists (ACLs) to control access to shared files.

• Examples of NFS secure servers include Red Hat Enterprise Linux and Ubuntu.

• N...read more

TCP Wrapper is a host-based network access control mechanism.

• It provides an additional layer of security by filtering incoming network traffic based on the IP address of the remote host.

• It uses the /etc/hosts.allow and /etc/hosts.deny files to determine which hosts are allowed or denied access.

• It can be used to restrict access to specific services such as SSH, FTP, and Telnet.

• It can also be used to log connection attem...read more

Network teaming is the process of combining multiple network interfaces to work as a single interface.

• Teaming provides redundancy and load balancing.

• It can be done at the software or hardware level.

• Teaming can be configured for different modes such as active-backup, round-robin, and LACP.

• Examples of teaming software include Linux bonding and Windows NIC teaming.

iptables is a Linux-based firewall tool that uses packet filtering and NAT to control network traffic.

• iptables is used to set up, maintain, and inspect the tables of IP packet filter rules in the Linux kernel.

• It can be used to block or allow traffic based on various criteria such as IP address, port number, protocol, etc.

• iptables can also be used for Network Address Translation (NAT) to modify the source or destination...read more