Installer can't find apache2ctl

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not sure how to do it in python but for shell scripting would be easy to make apache2ctl a variable which is defined depending on Linux OS detected

for example with centos and default apache 2.2.15 in centos 6 with httpd yum package would be something like

if apache was installed via httpd yum package

yum -y install httpd httpd-devel

you will have apachectl at /usr/sbin/apachectl

query what httpd package installed for binaries

rpm -ql httpd | grep sbin
/usr/sbin/apachectl
/usr/sbin/htcacheclean
/usr/sbin/httpd
/usr/sbin/httpd.event
/usr/sbin/httpd.worker
/usr/sbin/httxt2dbm
/usr/sbin/rotatelogs
/usr/sbin/suexec

then you'd check and assign variables

if debian and path to /PATH/TO/apache2ctl exists then assign variable

if centos and path to /usr/sbin/apachectl exists then assign variable

then just a matter of parsing the output

/usr/sbin/apachectl -V
Server version: Apache/2.2.15 (Unix)
Server built:   Aug 24 2015 17:52:49
Server's Module Magic Number: 20051115:25
Server loaded:  APR 1.3.9, APR-Util 1.3.9
Compiled using: APR 1.3.9, APR-Util 1.3.9
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="run/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"

OS checks

cat /etc/redhat-release 
CentOS release 6.7 (Final)

cat /etc/redhat-release 
CentOS Linux release 7.1.1503 (Core)

Check for installed version of Apache httpd package

yum list installed -q | grep httpd
httpd.x86_64                       2.2.15-47.el6.centos                @updates 
httpd-devel.x86_64                 2.2.15-47.el6.centos                @updates 
httpd-tools.x86_64                 2.2.15-47.el6.centos                @updates

can get tricky as CentOS 6.x defaults to Apache 2.2.15 and CentOS 7.x defaults to Apache 2.4.6 and layout can differ

I'm guessing for the widest range of Apache compatibility, you will need to reach out to the following folks to get their input and information one how Apache is setup in their envionrments

  • CentOS, Redhat, Fedora
  • Cpanel/WHM
  • DirectAdmin
  • Odin/Plesk
  • Virtualmin
  • Webmin
  • Ubuntu
  • Amazon EC2 folks as Amazon AMI image uses Apache 2.2.31 custom RPM build
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