Web service processes on Linux: What is the name of the daemon (service process) commonly used by the Apache web server on UNIX/Linux systems?

Introduction / Context:
The Apache HTTP Server is one of the most widely deployed web servers. On UNIX/Linux, it runs as a daemon process that listens on TCP port 80 (HTTP) and optionally 443 (HTTPS). Recognizing its service name is essential for starting, stopping, and troubleshooting web services.

Given Data / Assumptions:

• An Apache installation is present on a UNIX-like system.
• Service management may be via systemd (systemctl) or legacy init scripts (service).
• The conventional daemon name is used.

Concept / Approach:

The Apache daemon is traditionally named httpd (HTTP daemon). Distributions package it under names like httpd (RHEL/CentOS) or apache2 (Debian/Ubuntu), but the underlying process binary is typically httpd. Administrators manage it with systemctl start httpd or service httpd start, depending on the init system.

Step-by-Step Solution:

Verification / Alternative check:

Check listening sockets with ss -lntp | grep :80 or journalctl -u httpd for logs and errors. Confirm firewall rules allow inbound HTTP/HTTPS traffic.

Why Other Options Are Wrong:

a: apached is not the standard daemon name.

c: html is a document format, not a daemon.

d: shttp is not the default Apache service name.

e: Not applicable since httpd is correct.

Common Pitfalls:

Confusing package names with service names (apache2 vs httpd), ignoring SELinux contexts on content directories, and forgetting to open ports 80/443 in the firewall.

Final Answer:

httpd