Find out Apache Version

I have a rented dedicated LAMP solution stack server. I need to know what version of Apache I am running. How do I find out my Apache server version? How do I find out what modules loaded using command line option on Linux or Unix like operating systems?

The acronym LAMP refers the components of the solution stack composed entirely of free and open-source software as follows:
Tutorial details
DifficultyEasy (rss)
Root privilegesNo
RequirementsApache/Bash/Ksh/Tcsh
Time2m

ADVERTISEMENTS

  1. L for Linux operating systems
  2. A for Apache http web server
  3. M for MySQL or MariaDB database management server
  4. P for PHP, Perl, or Python scripting languages

Task: Show Apache httpd web server version command

httpd is the Apache HyperText Transfer Protocol (HTTP) server program. In order to find out apache version login to server using ssh or console. Once logged in type the following command to print the version of httpd, and then exit:
# httpd -v
Sample output:

Server version: Apache/2.2.3
Server built:   Oct 28 2008 07:22:45

Task: Output a list of modules compiled into the server:

# httpd -l
This will not list dynamically loaded modules included using the LoadModule directive. To dump a list of loaded Static and Shared Modules:
# httpd -M
Sample output:

Loaded Modules:
 core_module (static)
 mpm_prefork_module (static)
 http_module (static)
 so_module (static)
 auth_basic_module (shared)
 auth_digest_module (shared)
 authn_file_module (shared)
 authn_alias_module (shared)
 authn_anon_module (shared)
 authn_dbm_module (shared)
 authn_default_module (shared)
 authz_host_module (shared)
 authz_user_module (shared)
 authz_owner_module (shared)
 authz_groupfile_module (shared)
 authz_dbm_module (shared)
 authz_default_module (shared)
 ldap_module (shared)
 authnz_ldap_module (shared)
 include_module (shared)
 log_config_module (shared)
 logio_module (shared)
 env_module (shared)
 ext_filter_module (shared)
 mime_magic_module (shared)
 expires_module (shared)
 deflate_module (shared)
 headers_module (shared)
 usertrack_module (shared)
 setenvif_module (shared)
 mime_module (shared)
 dav_module (shared)
 status_module (shared)
 autoindex_module (shared)
 info_module (shared)
 dav_fs_module (shared)
 vhost_alias_module (shared)
 negotiation_module (shared)
 dir_module (shared)
 actions_module (shared)
 speling_module (shared)
 userdir_module (shared)
 alias_module (shared)
 rewrite_module (shared)
 proxy_module (shared)
 proxy_balancer_module (shared)
 proxy_ftp_module (shared)
 proxy_http_module (shared)
 proxy_connect_module (shared)
 cache_module (shared)
 suexec_module (shared)
 disk_cache_module (shared)
 file_cache_module (shared)
 mem_cache_module (shared)
 cgi_module (shared)
 version_module (shared)
 chroot_module (shared)
 perl_module (shared)
 php5_module (shared)
 proxy_ajp_module (shared)
 python_module (shared)
Syntax OK

Print the version and build parameters of httpd, and then exit

Type the command:
# httpd -V
Sample output:

Server version: Apache/2.2.3
Server built:   Oct 28 2008 07:22:45
Server's Module Magic Number: 20051115:3
Server loaded:  APR 1.2.7, APR-Util 1.2.7
Compiled using: APR 1.2.7, APR-Util 1.2.7
Architecture:   64-bit
Server MPM:     Prefork
  threaded:     no
    forked:     yes (variable process count)
Server compiled with....
 -D APACHE_MPM_DIR="server/mpm/prefork"
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
 -D APR_USE_SYSVSEM_SERIALIZE
 -D APR_USE_PTHREAD_SERIALIZE
 -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D DYNAMIC_MODULE_LIMIT=128
 -D HTTPD_ROOT="/etc/httpd"
 -D SUEXEC_BIN="/usr/sbin/suexec"
 -D DEFAULT_PIDLOG="logs/httpd.pid"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_LOCKFILE="logs/accept.lock"
 -D DEFAULT_ERRORLOG="logs/error_log"
 -D AP_TYPES_CONFIG_FILE="conf/mime.types"
 -D SERVER_CONFIG_FILE="conf/httpd.conf"

To view other configuration settings open httpd.conf file (usually located in /etc/httpd directory). Red hat, CentOS and Fedora stores httpd at the following location:
# vi /etc/httpd/conf/httpd.conf
Debian and Ubuntu stores httpd.conf in apache2.conf file at the following location:
# vi /etc/apache2/apache2.conf
FreeBSD stores apache2.2 configuration at the following location:
# vi /usr/local/etc/apache22/httpd.conf
If you made any changes to httpd.conf, check httpd syntax for error using the -t option:
# httpd -t
If there are no errors, simply restart Apache web server.

🐧 Get the latest tutorials on SysAdmin, Linux/Unix, Open Source/DevOps topics:
CategoryList of Unix and Linux commands
File Managementcat
Network Utilitiesdig host ip nmap
Package Managerapk apt
Processes Managementbg chroot disown fg jobs killall kill pidof pstree pwdx time
Searchinggrep whereis which
User Informationgroups id lastcomm last lid/libuser-lid logname members users whoami who w

ADVERTISEMENTS
21 comments… add one
  • mhernandez Dec 20, 2008 @ 10:44

    Very complete post. I’ll keep it as a quick reference just in case i have to admin any of these systems.

  • n03x3c Dec 20, 2008 @ 15:27

    Good post. This is good to keep in quick ref. book…

  • Protocol Dec 20, 2008 @ 18:41

    You can also get some basic info if you telnet the server on port 80 and then type
    get / http/1.0

    It doesn’t tell you everything but you can get the basics.
    //G

  • Protocol Dec 20, 2008 @ 18:44

    Sorry, its

    head / http/1.0

    //G

  • Jeff Schroeder Dec 22, 2008 @ 14:15

    @The above post: If you don’t want an error message, do it like this:

    $ telnet http://www.somesite.com 80
    HEAD / HTTP/1.1
    Host: http://www.somesite.com


    Jeff Schroeder
    http://www.digitalprognosis.com

  • 🐧 nixCraft Dec 22, 2008 @ 15:49

    This is much easier for fingerprint remote web server
    curl -I http://example.com/

  • achmad Oct 27, 2009 @ 9:11

    hi, i am using apache version 2.2.3, before this the server is using public IP, then we decide to put it behind firewall and map the local IP. So, once we change the server’s IP address to local, we are unable to open the website, just the front page of apache. I think it was no issue with firewall because when we ping the public IP and can remote the server. Please help anyone…

  • Lee Murray Sep 23, 2010 @ 13:37

    good tutorials.

  • Toby Jan 21, 2011 @ 11:06

    Exactly what I was looking for, cheers!

  • Bipin Apr 23, 2011 @ 18:45

    Hi ,

    How can we check loaded modules version?

    Thanks,
    Bipin Bahuguna

  • Troy Nov 7, 2011 @ 20:35

    This didn’t work for me, but

    apache2 -v
    

    did

    • sredhar Dec 7, 2012 @ 11:10

      It is

      apachectl -v

  • Mkr Nov 30, 2011 @ 20:48

    Thanks, this post is extremely helpful

  • Max Jan 20, 2012 @ 14:34

    Thanks. Just what I needed.

  • TI Nov 21, 2012 @ 6:13

    The simple command helps me a lot. Thank you!

  • REM Jan 31, 2013 @ 21:17

    Actually, the very easiest way to determine what version of Apache you are running is to request a nonexistent page.

  • nickchacha Jun 8, 2013 @ 5:22

    Well done for newbies like i.
    Thanks

  • Eddie Oct 31, 2013 @ 3:50

    How to find out the VERSIONS of the loaded modules in Apache 2.x in CentOS 6.x is something that has been eluding me for a while. I don’t want to know which modules are loaded – I want their versions. HOW do I find out?

    • 🐧 nixCraft Nov 9, 2013 @ 5:54

      You can’t. Almost all modules are bundled and compiled for same version i.e. httpd version is 2.2.15 is same for all loaded modules.

      HTH

  • Mevin Nov 21, 2014 @ 12:04

    I would like to know how to check the version of apache in hp-ux. Thank you.

  • Robert Oct 20, 2015 @ 16:03

    what if httpd is not in your path?

Leave a Reply

Your email address will not be published.

Use HTML <pre>...</pre>, <code>...</code> and <kbd>...</kbd> for code samples.