From bdf44f06b755b5bb27e66929f68e21eb5c25a1cc Mon Sep 17 00:00:00 2001 From: Ezio Date: Tue, 15 Nov 2016 22:26:47 +0800 Subject: [PATCH] =?UTF-8?q?20161115-3=20=E9=80=89=E9=A2=98?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ...che-Modules-are-Enabled-Loaded in Linux.md | 177 ++++++++++++++++++ 1 file changed, 177 insertions(+) create mode 100644 sources/tech/20161115-How-to-Check-Which-Apache-Modules-are-Enabled-Loaded in Linux.md diff --git a/sources/tech/20161115-How-to-Check-Which-Apache-Modules-are-Enabled-Loaded in Linux.md b/sources/tech/20161115-How-to-Check-Which-Apache-Modules-are-Enabled-Loaded in Linux.md new file mode 100644 index 0000000000..2444f2a308 --- /dev/null +++ b/sources/tech/20161115-How-to-Check-Which-Apache-Modules-are-Enabled-Loaded in Linux.md @@ -0,0 +1,177 @@ +How to Check Which Apache Modules are Enabled/Loaded in Linux +============================================================ + +In this guide, we will briefly talk about the Apache web server front-end and how to list or check which Apache modules have been enabled on your server. + +Apache is built, based on the principle of modularity, this way, it enables web server administrators to add different modules to extend its primary functionalities and [enhance apache performance][5] as well. + +Some of the common Apache modules include: + +1. mod_ssl – which offers [HTTPS for Apache][1]. +2. mod_rewrite – which allows for matching url patterns with regular expressions, and perform a transparent redirect using [.htaccess tricks][2], or apply a HTTP status code response. +3. mod_security – which offers you to [protect Apache against Brute Force or DDoS attacks][3]. +4. mod_status – that allows you to [monitor Apache web server load and page statics][4]. + +In Linux, the apachectl or apache2ctl command is used to control Apache HTTP server interface, it is a front-end to Apache. + +You can display the usage information for apache2ctl as below: + +``` +$ apache2ctl help +OR +$ apachectl help +``` +apachectl help +``` +Usage: /usr/sbin/httpd [-D name] [-d directory] [-f file] + [-C "directive"] [-c "directive"] + [-k start|restart|graceful|graceful-stop|stop] + [-v] [-V] [-h] [-l] [-L] [-t] [-S] +Options: + -D name : define a name for use in directives + -d directory : specify an alternate initial ServerRoot + -f file : specify an alternate ServerConfigFile + -C "directive" : process directive before reading config files + -c "directive" : process directive after reading config files + -e level : show startup errors of level (see LogLevel) + -E file : log startup errors to file + -v : show version number + -V : show compile settings + -h : list available command line options (this page) + -l : list compiled in modules + -L : list available configuration directives + -t -D DUMP_VHOSTS : show parsed settings (currently only vhost settings) + -S : a synonym for -t -D DUMP_VHOSTS + -t -D DUMP_MODULES : show all loaded modules + -M : a synonym for -t -D DUMP_MODULES + -t : run syntax check for config files +``` + +apache2ctl can function in two possible modes, a Sys V init mode and pass-through mode. In the SysV init mode, apache2ctl takes simple, one-word commands in the form below: + +``` +$ apachectl command +OR +$ apache2ctl command +``` + +For instance, to start Apache and check its status, run these two commands with root user privileges by employing the [sudo command][6], in case you are a normal user: + +``` +$ sudo apache2ctl start +$ sudo apache2ctl status +``` +Check Apache Status +``` +tecmint@TecMint ~ $ sudo apache2ctl start +AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1\. Set the 'ServerName' directive globally to suppress this message +httpd (pid 1456) already running +tecmint@TecMint ~ $ sudo apache2ctl status +Apache Server Status for localhost (via 127.0.0.1) + +Server Version: Apache/2.4.18 (Ubuntu) +Server MPM: prefork +Server Built: 2016-07-14T12:32:26 + +------------------------------------------------------------------------------- + +Current Time: Tuesday, 15-Nov-2016 11:47:28 IST +Restart Time: Tuesday, 15-Nov-2016 10:21:46 IST +Parent Server Config. Generation: 2 +Parent Server MPM Generation: 1 +Server uptime: 1 hour 25 minutes 41 seconds +Server load: 0.97 0.94 0.77 +Total accesses: 2 - Total Traffic: 3 kB +CPU Usage: u0 s0 cu0 cs0 +.000389 requests/sec - 0 B/second - 1536 B/request +1 requests currently being processed, 4 idle workers + +__W__........................................................... +................................................................ +...................... + +Scoreboard Key: +"_" Waiting for Connection, "S" Starting up, "R" Reading Request, +"W" Sending Reply, "K" Keepalive (read), "D" DNS Lookup, +"C" Closing connection, "L" Logging, "G" Gracefully finishing, +"I" Idle cleanup of worker, "." Open slot with no current process +``` + +And when operating in pass-through mode, apache2ctl can take all the Apache arguments in the following syntax: + +``` +$ apachectl [apache-argument] +$ apache2ctl [apache-argument] +``` + +All the Apache-arguments can be listed as follows: + +``` +$ apache2 help [On Debian based systems] +$ httpd help [On RHEL based systems] +``` + +#### Check Enabled Apache Modules + +Therefore, in order to check which modules are enabled on your Apache web server, run the applicable command below for your distribution, where `-t -D DUMP_MODULES` is a Apache-argument to show all enabled/loaded modules: + +``` +--------------- On Debian based systems --------------- +$ apache2ctl -t -D DUMP_MODULES +OR +$ apache2ctl -M +``` + +``` +--------------- On RHEL based systems --------------- +$ apachectl -t -D DUMP_MODULES +OR +$ httpd -M +$ apache2ctl -M +``` +List Apache Enabled Loaded Modules +``` +[root@tecmint httpd]# apachectl -M +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) +.... +``` + +That’s all! in this simple tutorial, we explained how to use the Apache front-end tools to list enabled/loaded apache modules. Keep in mind that you can get in touch using the feedback form below to send us your questions or comments concerning this guide. + +-------------------------------------------------------------------------------- + +via: http://www.tecmint.com/check-apache-modules-enabled + +作者：[Aaron Kili][a] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]:http://www.tecmint.com/author/aaronkili/ +[1]:http://www.tecmint.com/install-lets-encrypt-ssl-certificate-to-secure-apache-on-rhel-centos/ +[2]:http://www.tecmint.com/apache-htaccess-tricks/ +[3]:http://www.tecmint.com/protect-apache-using-mod_security-and-mod_evasive-on-rhel-centos-fedora/ +[4]:http://www.tecmint.com/monitor-apache-web-server-load-and-page-statistics/ +[5]:http://www.tecmint.com/apache-performance-tuning/ +[6]:http://www.tecmint.com/su-vs-sudo-and-how-to-configure-sudo-in-linux/