my $file_to_write = "/tmp/writetest.txt";    
unless (open(OUTFILE, ">>", $file_to_write)) {
    print "Failed to open (for append) $file_to_write.
\n";
}
printf "%s %s Write test to $file_to_write\n", ljpDate(), ljpTime();
printf OUTFILE "%s %s Write test\n", ljpDate(), ljpTime();
close OUTFILE;
print "Write completed
\n";

.h1 CGI scripts
# These settings control Lynx's ability to execute various types of scripts.

.h2 LOCAL_EXECUTION_LINKS_ALWAYS_ON
.h2 LOCAL_EXECUTION_LINKS_ON_BUT_NOT_REMOTE
# Local execution links and scripts are by default completely disabled,
# unless a change is made to the userdefs.h file to enable them or
# the configure script is used with the corresponding options
# (-enable-exec-links and -enable-exec-scripts).
# See the Lynx source code distribution and the userdefs.h
# file for more detail on enabling execution links and scripts.
#
# If you have enabled execution links or scripts the following
# two variables control Lynx's action when an execution link
# or script is encountered.
#
# If LOCAL_EXECUTION_LINKS_ALWAYS_ON is set to TRUE any execution
# link or script will be executed no matter where it came from.
# This is EXTREMELY dangerous.  Since Lynx can access files from
# anywhere in the world, you may encounter links or scripts that
# will cause damage or compromise the security of your system.
#
# If LOCAL_EXECUTION_LINKS_ON_BUT_NOT_REMOTE is set to TRUE only
# links or scripts that reside on the local machine and are
# referenced with a URL beginning with "file://localhost/" or meet
# TRUSTED_EXEC or ALWAYS_TRUSTED_EXEC rules (see below) will be
# executed.  This is much less dangerous than enabling all execution
# links, but can still be dangerous.
#
#LOCAL_EXECUTION_LINKS_ALWAYS_ON:FALSE
#LOCAL_EXECUTION_LINKS_ON_BUT_NOT_REMOTE:FALSE

.h2 TRUSTED_EXEC
# If LOCAL_EXECUTION_LINK_ON_BUT_NOT_REMOTE is TRUE, and no TRUSTED_EXEC
# rule is defined, it defaults to "file://localhost/" and any lynxexec
# or lynxprog command will be permitted if it was referenced from within
# a document whose URL begins with that string.  If you wish to restrict the
# referencing URLs further, you can extend the string to include a trusted
# path.  You also can specify a trusted directory for http URLs, which will
# then be treated as if they were local rather than remote.  For example:
#
#	TRUSTED_EXEC:file://localhost/trusted/
#	TRUSTED_EXEC:http://www.wfbr.edu/trusted/ 
#
# If you also wish to restrict the commands which can be executed, create
# a series of rules with the path (Unix) or command name (VMS) following
# the string, separated by a tab.  For example:
#
# Unix:
# ====
#	TRUSTED_EXEC:file://localhost//bin/cp
#	TRUSTED_EXEC:file://localhost//bin/rm
# VMS:
# ===
#	TRUSTED_EXEC:file://localhost/copy
#	TRUSTED_EXEC:file://localhost/delete
#
# Once you specify a TRUSTED_EXEC referencing string, the default is
# replaced, and all the referencing strings you desire must be specified
# as a series.  Similarly, if you associate a command with the referencing
# string, you must specify all of the allowable commands as a series of
# TRUSTED_EXEC rules for that string.  If you specify ALWAYS_TRUSTED_EXEC
# rules below, you need not repeat them as TRUSTED_EXEC rules.
#
# If EXEC_LINKS and JUMPFILE have been defined, any lynxexec or lynxprog
# URLs in that file will be permitted, regardless of other settings.  If
# you also set LOCAL_EXECUTION_LINKS_ON_BUT_NOT_REMOTE:TRUE and a single
# TRUSTED_EXEC rule that will always fail (e.g., "none"), then *ONLY* the
# lynxexec or lynxprog URLs in JUMPFILE (and any ALWAYS_TRUSTED_EXEC rules,
# see below) will be allowed.  Note, however, that if Lynx was compiled with
# CAN_ANONYMOUS_JUMP set to FALSE (default is TRUE), or -restrictions=jump
# is included with the -anonymous switch at run time, then users of an
# anonymous account will not be able to access the jumps file or enter
# 'j'ump shortcuts, and this selective execution feature will be overridden
# as well (i.e., they will only be able to access lynxexec or lynxprog
# URLs which meet any ALWAYS_TRUSTED_EXEC rules).
#
#TRUSTED_EXEC:none

.h2 ALWAYS_TRUSTED_EXEC
# If EXEC_LINKS was defined, any lynxexec or lynxprog URL can be made
# always enabled by an ALWAYS_TRUSTED_EXEC rule for it.  This is useful for
# anonymous accounts in which you have disabled execution links generally,
# and may also have disabled jumps file links, but still want to allow
# execution of particular utility scripts or programs.  The format is
# like that for TRUSTED_EXEC.  For example:
#
# Unix:
# ====
#   ALWAYS_TRUSTED_EXEC:file://localhost//usr/local/kinetic/bin/usertime
#   ALWAYS_TRUSTED_EXEC:http://www.more.net//usr/local/kinetic/bin/who.sh 
# VMS:
# ===
#   ALWAYS_TRUSTED_EXEC:file://localhost/usertime
#   ALWAYS_TRUSTED_EXEC:http://www.more.net/show  users
#
# The default ALWAYS_TRUSTED_EXEC rule is "none".
#
#ALWAYS_TRUSTED_EXEC:none

.h2 TRUSTED_LYNXCGI
# Unix:
# =====
# TRUSTED_LYNXCGI rules define the permitted sources and/or paths for
# lynxcgi links (if LYNXCGI_LINKS is defined in userdefs.h).  The format
# is the same as for TRUSTED_EXEC rules (see above).  Example rules:
#
#	TRUSTED_LYNXCGI:file://localhost/
#	TRUSTED_LYNXCGI:/usr/local/etc/httpd/cgi-bin/
#	TRUSTED_LYNXCGI:file://localhost//usr/local/www/cgi-bin/
#
# VMS:
# ====
# Do not define this.
#
# The default TRUSTED_LYNXCGI rule is "none".
#
TRUSTED_LYNXCGI:none

.h2 LYNXCGI_ENVIRONMENT
# Unix:
# =====
# LYNXCGI_ENVIRONMENT adds the current value of the specified
# environment variable to the list of environment variables passed on to the
# lynxcgi script.  Useful variables are HOME, USER, etc...  If proxies
# are in use, and the script invokes another copy of lynx (or a program like
# wget) in a subsidiary role, it can be useful to add http_proxy and other
# *_proxy variables.
#
# VMS:
# ====
# Do not define this.
#
#LYNXCGI_ENVIRONMENT:

.h2 LYNXCGI_DOCUMENT_ROOT
# Unix:
# =====
# LYNXCGI_DOCUMENT_ROOT is the value of DOCUMENT_ROOT that will be passed
# to lynxcgi scripts.  If set and the URL has PATH_INFO data, then
# PATH_TRANSLATED will also be generated.  Examples:
#	LYNXCGI_DOCUMENT_ROOT:/usr/local/etc/httpd/htdocs
#	LYNXCGI_DOCUMENT_ROOT:/data/htdocs/
#
# VMS:
# ====
# Do not define this.
#
#LYNXCGI_DOCUMENT_ROOT:

function submit_form()
	{
		var div1 = document.getElementById("extern");
		var data = {};
		data = recursive_f(div1, 0, 0);
		output = JSON.stringify(data);
		var xhr_lv = new XMLHttpRequest();
        xhr_lv.onreadystatechange=function()
        xhr_lv.open("POST", "/scripts_files/json.cgi", true);
        xhr_lv.setRequestHeader('Content-Type', 'application/json; charset=UTF-8');
        xhr_lv.send(output);
	}

#include 
#include 
#include 

int main(int argc, char* argv[])
{
    char* post_len_v = getenv("CONTENT_LENGTH");
    long post_len = strtol(post_len_v, NULL, 10);
    char* post_msg = (char*)malloc(post_len + 1);
    FILE *fp;


    if (!post_msg)
    { 
        return 0; 
    }
    fgets(post_msg, post_len + 1, stdin);      

    fp = fopen("/mnt/userfs/lighttpd/www/scripts_files/conf.json", "w");

    fprintf(fp, "%s", post_msg);
    fclose(fp);

    printf("Content-type: application/json\n\n");

    return 0;
}

server.modules              = (
                "mod_indexfile",
                "mod_access",
                "mod_redirect",
                "mod_alias",
                "mod_compress",
                "mod_dirlisting",
                "mod_staticfile",
                "mod_auth",
                "mod_authn_file",
                "mod_accesslog",
                "mod_cgi",
                #"mod_rewrite",
                #"mod_status"
                #"mod_fastcgi"
)

server.document-root        = "/mnt/userfs/lighttpd/www"


server.errorlog             = "/mnt/userfs/lighttpd/log/error.log"
server.breakagelog         = "/mnt/userfs/lighttpd/log/breakage.log"

index-file.names            = ("index.html", "main.html", "file_upload.html")

mimetype.assign = (
	".class" => "application/java-vm",
	".js" => "application/javascript",
	".mjs" => "application/javascript",
	".json" => "application/json",
	".jsonld" => "application/ld+json",
	".wmx" => "video/x-ms-wmx",
	".wvx" => "video/x-ms-wvx",
	".avi" => "video/x-msvideo",
	".movie" => "video/x-sgi-movie",
	".ice" => "x-conference/x-cooltalk",
	".sisx" => "x-epoc/x-sisx-app",
	".vrm" => "x-world/x-vrml",
	"README" => "text/plain; charset=utf-8",
	"Makefile" => "text/x-makefile; charset=utf-8",
	
	# enable caching for unknown mime types:
	#"" => "application/octet-stream"
)

mimetype.use-xattr        = "disable" 

url.access-deny             = ( "~", ".inc" )

static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )

server.port                = 80

server.username            = "midac"
server.groupname           = "midac"

#compress.cache-dir          = "/var/cache/lighttpd/compress/"
compress.filetype           = ( "application/javascript", "text/css", "text/html", "text/plain" )

cgi.assign = ( ".cgi" => "" )

$HTTP["url"] =~ "/admin" {
auth.backend = "htpasswd"
auth.backend.htpasswd.userfile = "/mnt/userfs/lighttpd/www/admin/.htpasswd"
auth.require = ( "/admin" => (
    "method" => "basic", 
    "realm" => "main", 
    "require" => "valid-user") 
)
}

$HTTP["url"] =~ "/user" {
auth.backend = "htpasswd"
auth.backend.htpasswd.userfile = "/mnt/userfs/lighttpd/www/user/.htpasswd"
auth.require = ( "/user" => (
    "method" => "basic", 
    "realm" => "main", 
    "require" => "valid-user") 
)
}

$HTTP["url"] =~ "/user2" {
auth.backend = "htpasswd"
auth.backend.htpasswd.userfile = "/mnt/userfs/lighttpd/www/user2/.htpasswd"
auth.require = ( "/user2" => (
    "method" => "basic", 
    "realm" => "main", 
    "require" => "valid-user") 
)
}

root@debian-s-1vcpu-1gb-fra1-01:~# cat /usr/lib/cgi-bin/test
#!/usr/bin/perl

use strict;
local $|=1;

print "Content-encoding: none\nContent-type: text/plain\n\n";
#print "Content-type: text/plain\n\n";

for ( my $i = 1 ; $i  GET /cgi-bin/test HTTP/1.1
> Host: 164.90.236.255
> Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
> Accept-Encoding: gzip, deflate
> Accept-Language: en-US,en;q=0.5
> Connection: keep-alive
> Upgrade-Insecure-Requests: 1
> User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0
>
< HTTP/1.1 200 OK
< Date: Mon, 24 Jan 2022 12:19:56 GMT
< Server: Apache/2.4.25 (Debian)
< Content-encoding: none
< Keep-Alive: timeout=5, max=100
< Connection: Keep-Alive
< Transfer-Encoding: chunked
< Content-Type: text/plain
<
1
2
3
4
5
6
7
8
9
10
* Connection #0 to host 164.90.236.255 left intact
$

Enter two numbers to add
     First Number: 

     Second Number: 

   
   Add

#!/usr/bin/env python3

import cgi, cgitb
cgitb.enable()

input_data = cgi.FieldStorage()

print('Content-Type: text/html') # HTML is following
print('')                         # Leave a blank line
print('
Addition Results
')
try:
    num1 = int(input_data["num1"].value)
    num2 = int(input_data["num2"].value)
except:
    print('Sorry, the script cannot turn your inputs into numbers (integers).')
    raise SystemExit(1)
print('{0} + {1} = {2}'.format(num1, num2, num1 + num2))

User@User-VirtualBox:/etc/apache2/sites-available$ sudo vim 000-default.conf

# The ServerName directive sets the request scheme, hostname and port that
        # the server uses to identify itself. This is used when creating
        # redirection URLs. In the context of virtual hosts, the ServerName
        # specifies what hostname must appear in the request's Host: header to
        # match this virtual host. For the default virtual host (this file) this
        # value is not decisive as it is used as a last resort host regardless.
        # However, you must set it for any further virtual host explicitly.
        #ServerName www.example.com

        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html
        
                Options ExecCGI Indexes FollowSymLinks MultiViews
                AllowOverride None
                Order allow,deny
                allow from all
                AddHandler cgi-script .cgi
        
        # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
        # error, crit, alert, emerg.
        # It is also possible to configure the loglevel for particular
        # modules, e.g.
        #LogLevel info ssl:warn

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        # For most configuration files from conf-available/, which are
        # enabled or disabled at a global level, it is possible to
        # include a line for only one particular virtual host. For example the
        # following line enables the CGI configuration for this host only
        # after it has been globally disabled with "a2disconf".
        #Include conf-available/serve-cgi-bin.conf 






# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

User@User-VirtualBox:/etc/apache2$ sudo vim apache2.conf

# This is the main Apache server configuration file.  It contains the
# configuration directives that give the server its instructions.
# See http://httpd.apache.org/docs/2.4/  for detailed information about
# the directives and /usr/share/doc/apache2/README.Debian about Debian specific
# hints.
#
#
# Summary of how the Apache 2 configuration works in Debian:
# The Apache 2 web server configuration in Debian is quite different to
# upstream's suggested way to configure the web server. This is because Debian's
# default Apache2 installation attempts to make adding and removing modules,
# virtual hosts, and extra configuration directives as flexible as possible, in
# order to make automating the changes and administering the server as easy as
# possible.

# It is split into several files forming the configuration hierarchy outlined
# below, all located in the /etc/apache2/ directory:
#
#       /etc/apache2/
#       |-- apache2.conf
#       |       `--  ports.conf
#       |-- mods-enabled
#       |       |-- *.load
#       |       `-- *.conf
#       |-- conf-enabled
#       |       `-- *.conf
#       `-- sites-enabled
#               `-- *.conf
#
#
# * apache2.conf is the main configuration file (this file). It puts the pieces
#   together by including all remaining configuration files when starting up the
#   web server.
#
# * ports.conf is always included from the main configuration file. It is
#   supposed to determine listening ports for incoming connections which can be
#   customized anytime.
#
# * Configuration files in the mods-enabled/, conf-enabled/ and sites-enabled/
#   directories contain particular configuration snippets which manage modules,
#   global configuration fragments, or virtual host configurations,
#   respectively.
#
#   They are activated by symlinking available configuration files from their
#   respective *-available/ counterparts. These should be managed by using our
#   helpers a2enmod/a2dismod, a2ensite/a2dissite and a2enconf/a2disconf. See
#   their respective man pages for detailed information.
#
# * The binary is called apache2. Due to the use of environment variables, in
#   the default configuration, apache2 needs to be started/stopped with
#   /etc/init.d/apache2 or apache2ctl. Calling /usr/bin/apache2 directly will not
#   work with the default configuration.


# Global configuration
#

#
# ServerRoot: The top of the directory tree under which the server's
# configuration, error, and log files are kept.
#
# NOTE!  If you intend to place this on an NFS (or otherwise network)
# mounted filesystem then please read the Mutex documentation (available
# at );
# you will save yourself a lot of trouble.
#
# Do NOT add a slash at the end of the directory path.
#
#ServerRoot "/etc/apache2"

#
# The accept serialization lock file MUST BE STORED ON A LOCAL DISK.
#
#Mutex file:${APACHE_LOCK_DIR} default

#
# The directory where shm and other runtime files will be stored.
#

DefaultRuntimeDir ${APACHE_RUN_DIR}

#
# PidFile: The file in which the server should record its process
# identification number when it starts.
# This needs to be set in /etc/apache2/envvars
#
PidFile ${APACHE_PID_FILE}

#
# Timeout: The number of seconds before receives and sends time out.
#
Timeout 300

#
# KeepAlive: Whether or not to allow persistent connections (more than
# one request per connection). Set to "Off" to deactivate.
#
KeepAlive On

#
# MaxKeepAliveRequests: The maximum number of requests to allow
# during a persistent connection. Set to 0 to allow an unlimited amount.
# We recommend you leave this number high, for maximum performance.
#
MaxKeepAliveRequests 100

#
# KeepAliveTimeout: Number of seconds to wait for the next request from the
# same client on the same connection.
#
KeepAliveTimeout 5


# These need to be set in /etc/apache2/envvars
User ${APACHE_RUN_USER}
Group ${APACHE_RUN_GROUP}

#
# HostnameLookups: Log the names of clients or just their IP addresses
# e.g., www.apache.org (on) or 204.62.129.132 (off).
# The default is off because it'd be overall better for the net if people
# had to knowingly turn this feature on, since enabling it means that
# each client request will result in AT LEAST one lookup request to the
# nameserver.
#
HostnameLookups Off

# ErrorLog: The location of the error log file.
# If you do not specify an ErrorLog directive within a 
# container, error messages relating to that virtual host will be
# logged here.  If you *do* define an error logfile for a 
# container, that host's errors will be logged there and not here.
#
ErrorLog ${APACHE_LOG_DIR}/error.log

#
# LogLevel: Control the severity of messages logged to the error_log.
# Available values: trace8, ..., trace1, debug, info, notice, warn,
# error, crit, alert, emerg.
# It is also possible to configure the log level for particular modules, e.g.
# "LogLevel info ssl:warn"
#
LogLevel warn

# Include module configuration:
IncludeOptional mods-enabled/*.load
IncludeOptional mods-enabled/*.conf

# Include list of ports to listen on
Include ports.conf


# Sets the default security model of the Apache2 HTTPD server. It does
# not allow access to the root filesystem outside of /usr/share and /var/www.
# The former is used by web applications packaged in Debian,
# the latter may be used for local directories served by the web server. If
# your system is serving content from a sub-directory in /srv you must allow
# access here, or in any related virtual host.

        Options FollowSymLinks
        AllowOverride None
        Require all denied



        AllowOverride None
        Require all granted



        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted


#
#       Options Indexes FollowSymLinks
#       AllowOverride None
#       Require all granted
#




# AccessFileName: The name of the file to look for in each directory
# for additional configuration directives.  See also the AllowOverride
# directive.
#
AccessFileName .htaccess

#
# The following lines prevent .htaccess and .htpasswd files from being
# viewed by Web clients.
#

        Require all denied



#
# The following directives define some format nicknames for use with
# a CustomLog directive.
#
# These deviate from the Common Log Format definitions in that they use %O
# (the actual bytes sent including headers) instead of %b (the size of the
# requested file), because the latter makes it impossible to detect partial
# requests.
#
# Note that the use of %{X-Forwarded-For}i instead of %h is not recommended.
# Use mod_remoteip instead.
#
LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined
LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %O" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent

# Include of directories ignores editors' and dpkg's backup files,
# see README.Debian for details.

# Include generic snippets of statements
IncludeOptional conf-enabled/*.conf

# Include the virtual host configurations:
IncludeOptional sites-enabled/*.conf

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet


#########     Adding capaility to run CGI-scripts #################
ServerName localhost
ScriptAlias /cgi-bin/ /var/www/cgi-bin/
Options +ExecCGI
AddHandler cgi-script .cgi .pl .py

User@User-VirtualBox:/usr/lib/cgi-bin$ sudo vim add.cgi
User@User-VirtualBox:/usr/lib/cgi-bin$ sudo vim add.html

User@User-VirtualBox:/usr/lib/cgi-bin$ sudo chmod a+x add.cgi
User@User-VirtualBox:/usr/lib/cgi-bin$ sudo chmod a+x add.html

http://localhost/cgi-bin/add.html

User@User-VirtualBox:/$ cd /var/www/html
User@User-VirtualBox: /var/www/html$ sudo vim add.cgi
User@User-VirtualBox: /var/www/html$ sudo vim add.html
User@User-VirtualBox:/var/www/html$ sudo chmod a+x add.cgi
User@User-VirtualBox:/var/www/html$ sudo chmod a+x add.html
User@User-VirtualBox:/var/www/html$ systemctl reload apache2

User@User-VirtualBox:/var/www/html$     sudo tail -n 2 /var/log/apache2/error.log
[Mon Jul 26 21:14:05.882030 2021] [core:notice] [pid 770:tid 139880185056320] AH00094: Command line: '/usr/sbin/apache2'
[Mon Jul 26 21:40:13.567334 2021] [authz_core:error] [pid 772:tid 139880105506560] [client 127.0.0.1:42216] AH01630: client denied by server configuration: /usr/www

User@User-VirtualBox:~$ ls /etc/apache2/mods-enabled/mpm* /etc/apache2/mods-enabled/cgi*
/etc/apache2/mods-enabled/cgid.conf  /etc/apache2/mods-enabled/mpm_event.conf
/etc/apache2/mods-enabled/cgid.load  /etc/apache2/mods-enabled/mpm_event.load

Enter two numbers to add
     First Number: 

     Second Number: 

   
   Add

#!/usr/bin/env python3

import cgi, cgitb
cgitb.enable()

input_data = cgi.FieldStorage()

print('Content-Type: text/html') # HTML is following
print('')                         # Leave a blank line
print('
Addition Results
')
try:
    num1 = int(input_data["num1"].value)
    num2 = int(input_data["num2"].value)
except:
    print('Sorry, the script cannot turn your inputs into numbers (integers).')
    raise SystemExit(1)
print('{0} + {1} = {2}'.format(num1, num2, num1 + num2))

User@User-VirtualBox:/etc/apache2/sites-available$ sudo vim 000-default.conf

# The ServerName directive sets the request scheme, hostname and port that
        # the server uses to identify itself. This is used when creating
        # redirection URLs. In the context of virtual hosts, the ServerName
        # specifies what hostname must appear in the request's Host: header to
        # match this virtual host. For the default virtual host (this file) this
        # value is not decisive as it is used as a last resort host regardless.
        # However, you must set it for any further virtual host explicitly.
        #ServerName www.example.com

        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html
        
                Options ExecCGI Indexes FollowSymLinks MultiViews
                AllowOverride None
                Order allow,deny
                allow from all
                AddHandler cgi-script .cgi
        
        # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
        # error, crit, alert, emerg.
        # It is also possible to configure the loglevel for particular
        # modules, e.g.
        #LogLevel info ssl:warn

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        # For most configuration files from conf-available/, which are
        # enabled or disabled at a global level, it is possible to
        # include a line for only one particular virtual host. For example the
        # following line enables the CGI configuration for this host only
        # after it has been globally disabled with "a2disconf".
        #Include conf-available/serve-cgi-bin.conf 






# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

User@User-VirtualBox:/etc/apache2$ sudo vim apache2.conf

# This is the main Apache server configuration file.  It contains the
# configuration directives that give the server its instructions.
# See http://httpd.apache.org/docs/2.4/  for detailed information about
# the directives and /usr/share/doc/apache2/README.Debian about Debian specific
# hints.
#
#
# Summary of how the Apache 2 configuration works in Debian:
# The Apache 2 web server configuration in Debian is quite different to
# upstream's suggested way to configure the web server. This is because Debian's
# default Apache2 installation attempts to make adding and removing modules,
# virtual hosts, and extra configuration directives as flexible as possible, in
# order to make automating the changes and administering the server as easy as
# possible.

# It is split into several files forming the configuration hierarchy outlined
# below, all located in the /etc/apache2/ directory:
#
#       /etc/apache2/
#       |-- apache2.conf
#       |       `--  ports.conf
#       |-- mods-enabled
#       |       |-- *.load
#       |       `-- *.conf
#       |-- conf-enabled
#       |       `-- *.conf
#       `-- sites-enabled
#               `-- *.conf
#
#
# * apache2.conf is the main configuration file (this file). It puts the pieces
#   together by including all remaining configuration files when starting up the
#   web server.
#
# * ports.conf is always included from the main configuration file. It is
#   supposed to determine listening ports for incoming connections which can be
#   customized anytime.
#
# * Configuration files in the mods-enabled/, conf-enabled/ and sites-enabled/
#   directories contain particular configuration snippets which manage modules,
#   global configuration fragments, or virtual host configurations,
#   respectively.
#
#   They are activated by symlinking available configuration files from their
#   respective *-available/ counterparts. These should be managed by using our
#   helpers a2enmod/a2dismod, a2ensite/a2dissite and a2enconf/a2disconf. See
#   their respective man pages for detailed information.
#
# * The binary is called apache2. Due to the use of environment variables, in
#   the default configuration, apache2 needs to be started/stopped with
#   /etc/init.d/apache2 or apache2ctl. Calling /usr/bin/apache2 directly will not
#   work with the default configuration.


# Global configuration
#

#
# ServerRoot: The top of the directory tree under which the server's
# configuration, error, and log files are kept.
#
# NOTE!  If you intend to place this on an NFS (or otherwise network)
# mounted filesystem then please read the Mutex documentation (available
# at );
# you will save yourself a lot of trouble.
#
# Do NOT add a slash at the end of the directory path.
#
#ServerRoot "/etc/apache2"

#
# The accept serialization lock file MUST BE STORED ON A LOCAL DISK.
#
#Mutex file:${APACHE_LOCK_DIR} default

#
# The directory where shm and other runtime files will be stored.
#

DefaultRuntimeDir ${APACHE_RUN_DIR}

#
# PidFile: The file in which the server should record its process
# identification number when it starts.
# This needs to be set in /etc/apache2/envvars
#
PidFile ${APACHE_PID_FILE}

#
# Timeout: The number of seconds before receives and sends time out.
#
Timeout 300

#
# KeepAlive: Whether or not to allow persistent connections (more than
# one request per connection). Set to "Off" to deactivate.
#
KeepAlive On

#
# MaxKeepAliveRequests: The maximum number of requests to allow
# during a persistent connection. Set to 0 to allow an unlimited amount.
# We recommend you leave this number high, for maximum performance.
#
MaxKeepAliveRequests 100

#
# KeepAliveTimeout: Number of seconds to wait for the next request from the
# same client on the same connection.
#
KeepAliveTimeout 5


# These need to be set in /etc/apache2/envvars
User ${APACHE_RUN_USER}
Group ${APACHE_RUN_GROUP}

#
# HostnameLookups: Log the names of clients or just their IP addresses
# e.g., www.apache.org (on) or 204.62.129.132 (off).
# The default is off because it'd be overall better for the net if people
# had to knowingly turn this feature on, since enabling it means that
# each client request will result in AT LEAST one lookup request to the
# nameserver.
#
HostnameLookups Off

# ErrorLog: The location of the error log file.
# If you do not specify an ErrorLog directive within a 
# container, error messages relating to that virtual host will be
# logged here.  If you *do* define an error logfile for a 
# container, that host's errors will be logged there and not here.
#
ErrorLog ${APACHE_LOG_DIR}/error.log

#
# LogLevel: Control the severity of messages logged to the error_log.
# Available values: trace8, ..., trace1, debug, info, notice, warn,
# error, crit, alert, emerg.
# It is also possible to configure the log level for particular modules, e.g.
# "LogLevel info ssl:warn"
#
LogLevel warn

# Include module configuration:
IncludeOptional mods-enabled/*.load
IncludeOptional mods-enabled/*.conf

# Include list of ports to listen on
Include ports.conf


# Sets the default security model of the Apache2 HTTPD server. It does
# not allow access to the root filesystem outside of /usr/share and /var/www.
# The former is used by web applications packaged in Debian,
# the latter may be used for local directories served by the web server. If
# your system is serving content from a sub-directory in /srv you must allow
# access here, or in any related virtual host.

        Options FollowSymLinks
        AllowOverride None
        Require all denied



        AllowOverride None
        Require all granted



        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted


#
#       Options Indexes FollowSymLinks
#       AllowOverride None
#       Require all granted
#




# AccessFileName: The name of the file to look for in each directory
# for additional configuration directives.  See also the AllowOverride
# directive.
#
AccessFileName .htaccess

#
# The following lines prevent .htaccess and .htpasswd files from being
# viewed by Web clients.
#

        Require all denied



#
# The following directives define some format nicknames for use with
# a CustomLog directive.
#
# These deviate from the Common Log Format definitions in that they use %O
# (the actual bytes sent including headers) instead of %b (the size of the
# requested file), because the latter makes it impossible to detect partial
# requests.
#
# Note that the use of %{X-Forwarded-For}i instead of %h is not recommended.
# Use mod_remoteip instead.
#
LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined
LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %O" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent

# Include of directories ignores editors' and dpkg's backup files,
# see README.Debian for details.

# Include generic snippets of statements
IncludeOptional conf-enabled/*.conf

# Include the virtual host configurations:
IncludeOptional sites-enabled/*.conf

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet


#########     Adding capaility to run CGI-scripts #################
ServerName localhost
ScriptAlias /cgi-bin/ /var/www/cgi-bin/
Options +ExecCGI
AddHandler cgi-script .cgi .pl .py

User@User-VirtualBox:/usr/lib/cgi-bin$ sudo vim add.cgi
User@User-VirtualBox:/usr/lib/cgi-bin$ sudo vim add.html

User@User-VirtualBox:/usr/lib/cgi-bin$ sudo chmod a+x add.cgi
User@User-VirtualBox:/usr/lib/cgi-bin$ sudo chmod a+x add.html

User@User-VirtualBox:/home/User/Desktop$ sudo vim add.cgi
User@User-VirtualBox:/home/User/Desktop$ sudo vim add.html

http://localhost/cgi-bin/add.html

User@User-VirtualBox:/$ cd /var/www/html
User@User-VirtualBox: /var/www/html$ sudo vim add.cgi
User@User-VirtualBox: /var/www/html$ sudo vim add.html
User@User-VirtualBox:/var/www/html$ sudo chmod a+x add.cgi
User@User-VirtualBox:/var/www/html$ sudo chmod a+x add.html
User@User-VirtualBox:/var/www/html$ systemctl reload apache2

User@User-VirtualBox:/var/www/html$     sudo tail -n 2 /var/log/apache2/error.log
[Sat Jul 24 23:09:12.993845 2021] [mpm_event:notice] [pid 782:tid 139660732775488] AH00489: Apache/2.4.41 (Ubuntu) configured -- resuming normal operations
[Sat Jul 24 23:09:12.993855 2021] [core:notice] [pid 782:tid 139660732775488] AH00094: Command line: '/usr/sbin/apache2'