LSI MegaRAID in Linux Ubuntu / Centos Tutorial Setup Guide megacli
Usually when I come across a system like this, Ijust flash the firmware to an IT mode so we get just an AHCI system with JBOD, but sometimes it is not practical for remote systems or if we fear that flashing is too risky if something goes wrong.
In this case, we unfortunately have to use LSI/Broadcom proprietary CLI tools (megacli) to even make the drives visible.
Step 1 - Download MegaCLI
The official broadcom packages lack .deb packages and only have .rpm for........
CDN Cloudflare how to set and preserve the real IP of the client without modifying application code on Apache
Your frontend CDN (eg. Cloudflare or even your own load balancer/proxy) must be sending the X-Forwarded-For and you must be running Apache on the backend.
This solves the problem where your logs and services will only see the proxy/CDN IP and not the real client IP.
modremoteip is the most modern and current working solution
Step 1.) Enable remoteip
a2enmod remoteip
Step 2.) Edit/Enable the correct config
Edit t........
Wordpress overwrites and wipes out custom htaccess rules and changes soluton
cat .htaccess
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php [L]
I keep reading there is a "# BEGIN WordPress" and a "# END WordPress" in the wordpress htaccess above but there is clearly not.
Even more strange is that my permissions are just 444 (read only).
so i changed it........
bash script to remove modules from httpd.conf that are not actually installed
confmodules=`cat /etc/httpd/conf/httpd.conf |grep -v ^#|grep "modules/"|awk '{print $3}'|cut -d "/" -f 2`
for module in $confmodules; do
echo "module=$module"
if [ ! -f /etc/httpd/modules/$module ]; then
linenum=`awk /"$module/{ print NR; exit}" /etc/httpd/conf/httpd.conf`
sed -i "$linenum"s/.*// /etc/httpd/conf/httpd.conf
&n........
Apache htaccess Custom ErrorDocument not working properly for root home page 403 Error Issue and Solution
So I have a domain "testdomain.com".
Inside test domain.com's root is the following .htaccess:
Options +FollowSymLinks -Indexes
ErrorDocument 403 /launch/index.html
Order Deny,Allow
Deny From All
Allow From 192.168.1.2
When you visit anything other than root things work fine. Eg. if you visit http://testdomain.com/somedirfile.html
It will show the right error in /launch/........
check if Apache uses worker MPM or prefork MPM
apachectl -l
Compiled in modules:
core.c
prefork.c
http_core.c
mod_so.c
It is "prefork.c" so in httpd.conf these settings are what you would use (if you use worker.c it won't have any impact):
StartServers 2
MinSpareServers 5
MaxSpareServers&nb........
CPanel Apache httpd won't start solution: Starting httpd: Syntax error on line 2 of /etc/httpd/conf/httpd.conf: Invalid command 'Alias', perhaps misspelled or defined by a module not included in the server configuration
root@hkhosting [/]# service httpd start
Starting httpd: Syntax error on line 2 of /etc/httpd/conf/httpd.conf:
Invalid command 'Alias', perhaps misspelled or defined by a module not included in the server configuration
........
kvm centos cannot compile error
./configure
./configure: cannot locate gcc 3.x. please install it or specify with --qemu-cc
yum -y install gcc make
./configure
./configure: cannot locate gcc 3.x. please install it or specify with --qemu-cc
yum -y install compat-gcc-*
./configure
Error: Could not find alsa
Make sure to have the alsa libs and headers installed.
yum -y install alsa-lib-devel
./configure........
Apache MPM worker vs prefork
find what MPM Apache is using, it will either be using "worker" or "prefork"
apachectl -l
Compiled in modules:
core.c
prefork.c
http_core.c
mod_so.c
In my case it is "prefork"
vi /etc/httpd/conf/httpd.conf
Find the section that looks like this (by default one will normally exist for prefork and for worker, but in my case I only care a........