Linux Administrator L1 Interview Questions and Answers for Freshers

Managing disk space in Linux involves monitoring usage, cleaning up files, and optimizing storage efficiently.

• Use the 'df -h' command to check disk space usage across all mounted filesystems.

• Utilize 'du -sh /path/to/directory' to find the size of specific directories.

• Implement log rotation using 'logrotate' to manage and compress log files.

• Identify and remove unnecessary files with 'find /path -type f -size +100M' to locate large files.

• Consider using tools like 'ncdu' for a v...read more

Networking in Linux involves configuring, managing, and troubleshooting network connections and services.

• Linux uses network interfaces (e.g., eth0, wlan0) to connect to networks.

• The 'ifconfig' command displays and configures network interfaces.

• The 'ping' command tests connectivity between hosts.

• Network services like SSH (port 22) allow remote access to Linux systems.

• Firewall management can be done using tools like iptables or firewalld.

Monitoring a system involves tracking performance, resource usage, and health to ensure optimal operation and quick issue resolution.

• Use command-line tools like 'top' and 'htop' to monitor CPU and memory usage.

• Check disk space with 'df -h' and monitor I/O performance using 'iostat'.

• Utilize log files in '/var/log/' to identify errors and system events.

• Implement monitoring tools like Nagios or Zabbix for real-time alerts.

• Use 'netstat' to monitor network connections and traffic.