How to check the Apache Tomcat and Apache Httpd version in Linux
Tomcat versions can be obtained by version.sh in bin directory of TOMCAT_HOME. HTTPD component version can be viewed using httpd -V command in sbin directory of HTTPD_HOME.
# [TOMCAT_HOME]/bin/version.sh
# [HTTPD_HOME]/sbin/httpd -V
For example:
Apache Tomcat
$ /opt/jws3/tomcat8/bin/version.sh
Using CATALINA_BASE: /opt/jws3/tomcat8
Using CATALINA_HOME: /opt/jws3/tomcat8
Using CATALINA_TMPDIR: /opt/jws3/tomcat8/temp
Using JRE_HOME: /home/rhel7/jdk8
Using CLASSPATH: /opt/jws3/tomcat8/bin/bootstrap.jar:/opt/jws3/tomcat8/bin/tomcat-juli.jar
Server version: Apache Tomcat/8.0.18
Server built: Aug 11 2015 14:53:16 UTC
Server number: 8.0.18-25_patch_00.ep7.el7.-patch-00
OS Name: Linux
OS Version: 3.10.0-514.10.2.el7.x86_64
Architecture: amd64
JVM Version: 1.8.0_73-b02
JVM Vendor: Oracle Corporation
Apache Httpd
$ ./httpd -v
Server version: Apache/2.4.23 (Red Hat)
Server built: Nov 6 2017 12:47:49