How to fixed error bad ELF interpreter

I got the following error:
/usr/local/lsws/bin/lswsctrl: ./litespeed: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory
[ERROR] Failed to start litespeed!

While was fixed by typing
yum install ld-linux.so.2

Then after that installed type
/usr/local/lsws/bin/lswsctrl start

cPanel CloudLinux Installation/Uninstallation

Cloud Linux greatly increases the stability of a shared hosting environment through it’s resource limit feature that prevents sudden resource spikes from taking down the entire server.
By using CloudLinux you can define the max CPU, Memory, Concurrent Connections and Number of Cores Per LVE .

Cloud Linux Installation ::

Below are the few simple steps to complete the installation ::
root@server[#] wget http://repo.cloudlinux.com/cloudlinux/sources/cln/cpanel2cl

root@server[#] sh cpanel2cl -k <activation_key>

root@server[#] reboot

root@server[#] /scripts/easyapache --build

root@server[#] yum install cpanel-lve -y

root@server[#] yum install cpanel-lvemanager -y

root@server[#] yum install lve-cpanel-plugin -y

Installing and Configuring mod_hostinglimits if not already loaded with default installation

root@server[#] wget http://repo.cloudlinux.com/cloudlinux/sources/mod_hostinglimits.tar.gz

root@server[#] tar -zxvf mod_hostinglimits.tar.gz

root@server[#] cd mod_hostinglimits

root@server[#] cmake CMakeLists.txt

root@server[#] make install

And then add the below line in the httpd.conf to load the mod_hostinglimits module in Apache

LoadModule hostinglimits_module modules/mod_hostinglimits.so

Cloud Linux Uninstallation ::

Follow the below steps to uninstall CloudLinux safely ::

Before proceeding to un-installation of CloudLinux , check if your server has CloudLinux installed

/usr/local/cpanel/bin/cloudlinux_system_install -c

1 > Update your CentOS-provided RPMs
root@server[#] yum upgrade -y

2 > Recompile Apache and prevent linking to liblve
root@server[#] /scripts/easyapache --build

3 > Re-install your Non-CloudLinux Kernel
root@server[#] yum --disableexcludes=all install kernel

4 > Remove CloudLinux Kernel
root@server[#] rpm -qa |awk '/^kernel.*lve/ {print $1|"xargs yum -y erase"}'

5 > Reinstall any CloudLinux-provided RPMs that are also provided by CentOS
root@server[#] rpm -qa --qf "[%{VENDOR} %{NAME}\n]"|awk '/CloudLinux/ {print $2|"xargs yum reinstall -y"}'

6 > Downgrade any CloudLinux provided RPMs to the CentOS version
root@server[#] rpm -qa --qf "[%{VENDOR} %{NAME}\n]"|awk '/CloudLinux/ {print $2|"xargs yum downgrade -y"}'

7 > Remove any remaining CloudLinux specific RPMs
rpm -qa --qf "[%{VENDOR} %{NAME}\n]"|awk '/CloudLinux/ {print $2|"xargs yum erase -y"}'

8 > Upgrade any downgraded CentOS provided RPMs
root@server[#] yum upgrade -y

9 > Reboot the server to use the new non-CloudLinux kernel
root@server[#] reboot

cpsrvd not running

If Cpanel is not running on the server and you are getting following,

# service cpanel status

cpsrvd dead but pid file exists
entropychat is stopped
melange is stopped
stunnel is stopped
interchange is stopped
qrunner is stopped

Then if you try to restart cpsrvd and if you are getting following error,

# /usr/local/cpanel/cpsrvd restart

Cwd object version 3.11 does not match $Cwd::VERSION 3.14

Then please try running following to fix the problem,

rm -rf /usr/local/cpanel/modules-install/pro-* (kill old version of pro modulres)
echo -n > /var/cpanel/addonmoduleversions/pro
/scripts/upcp --force

This will fix the problem and Cpanel will start working again.

CPanel Proxy - WHM Proxy Domain

What is CPanel Proxy Support?

CPanel proxy support allows you to access both the domain.com/cpanel and domain.com/webmail as subdomains. Additionally the normal CPanel ports for both the control panel and webmail are proxied through port 80. There are quite a few firewalls that block 2082, 2083 et. cetra as they are not standard ports.

The following once enabled should work:
http://cpanel.domain.com
http://webmail.domain.com
http://whm.domain.com

Requirements
CPanel
mod_rewrite
mod_proxy

How to enable CPanel Proxy

1. Open the WHM and access tweak settings:

Main >> Server Configuration >> Tweak Settings

2. Enable the following options:

Add proxy VirtualHost to httpd.conf to automatically redirect unconfigured cpanel, webmail, webdisk and whm subdomains to the correct port (requires mod_rewrite and mod_proxy)

Automatically create cpanel, webmail, webdisk and whm proxy subdomain DNS entries for new accounts. When this is initially enabled it will add appropriate proxy
subdomain DNS entries to all existing accounts. (Use /scripts/proxydomains to reconfigure the DNS entries manually)

This will setup all new accounts with the proper records; existing ones will need to be added via the /scripts/proxydomains script.

I would recommend disabling this one as you probably don’t want a client to break the setup for their domain trying to fix it:

Allow users to create cpanel, webmail, webdisk and whm subdomains that override automatically generated proxy subdomains

3. For existing accounts open a shell prompt as root. All you need to do now is to setup the sub-domains so that customers can access them. The best way to do this is to specify the username:
Example:
/scripts/proxydomains --user=username add
Usage:
/scripts/proxydomains --user=mycpaneluser add
To do all accounts on the server (which can take a while):
/scripts/proxydomains add
To list all the options for this script simply type
/scripts/proxydomains 

4. Add this to httpd.conf

# CPANEL/WHM/WEBMAIL/WEBDISK PROXY SUBDOMAINS
<VirtualHost xx.xx.xx:80 *>
    ServerName $hostname
    ServerAlias cpanel.* whm.* webmail.* webdisk.*
    DocumentRoot /usr/local/apache/htdocs
    ServerAdmin system@hostname
    <IfModule mod_security2.c>
        SecRuleEngine Off
    </IfModule>
    UserDir disable
    RewriteEngine On
    <IfModule core.c>
        SSLProxyEngine On
    </IfModule>
    RewriteCond %{HTTP_HOST} ^cpanel\.
    RewriteCond %{HTTPS} on
    RewriteRule ^/(.*) https://127.0.0.1:2083/$1 [P]
    RewriteCond %{HTTP_HOST} ^webmail\.
    RewriteCond %{HTTPS} on
    RewriteRule ^/(.*) https://127.0.0.1:2096/$1 [P]
    RewriteCond %{HTTP_HOST} ^whm\.
    RewriteCond %{HTTPS} on
    RewriteRule ^/(.*) https://127.0.0.1:2087/$1 [P]
    RewriteCond %{HTTP_HOST} ^webdisk\.
    RewriteCond %{HTTPS} on
    RewriteRule ^/(.*) https://127.0.0.1:2078/$1 [P]
    RewriteCond %{HTTP_HOST} ^cpanel\.
    RewriteRule ^/(.*) http://127.0.0.1:2082/$1 [P]
    RewriteCond %{HTTP_HOST} ^webmail\.
    RewriteRule ^/(.*) http://127.0.0.1:2095/$1 [P]
    RewriteCond %{HTTP_HOST} ^whm\.
    RewriteRule ^/(.*) http://127.0.0.1:2086/$1 [P]
    RewriteCond %{HTTP_HOST} ^webdisk\.
    RewriteRule ^/(.*) http://127.0.0.1:2077/$1 [P]
    UseCanonicalName Off
</VirtualHost> 

How to upgrade MySQL 5.0 to MySQL 5.1 cPanel

How to upgrade MySQL 5.0 to MySQL 5.1 in a cPanel server

Login as root and edit /var/cpanel/cpanel.config.

Replace :

mysql-version=5.0 with
mysql-version=5.1

Finally run: /scripts/mysqlup

Squid and password authentication

yum install squid

Example of squid.conf

http_port 10000
hierarchy_stoplist cgi-bin ?

acl QUERY urlpath_regex cgi-bin \?
no_cache deny QUERY

auth_param basic program /usr/lib/squid/ncsa_auth /etc/squid/passwd
auth_param basic children 5
auth_param basic realm Squid proxy-caching web server
auth_param basic credentialsttl 2 hours
auth_param basic casesensitive off

refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern . 0 20% 4320

acl all src 0.0.0.0/0.0.0.0
acl SSL_ports port 443 563
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 563 # https, snews
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http

acl ncsa_users proxy_auth REQUIRED
http_access deny !Safe_ports
http_access allow ncsa_users
visible_hostname mysite.com
coredump_dir /var/spool/squid

service squid start

Setting proxy for wget:

export http_proxy=http://anton:testinsg@mysite:10000

If you want to make it anonymous add these lines:

forwarded_for off

header_access Allow allow all
header_access Authorization allow all
header_access WWW-Authenticate allow all
header_access Proxy-Authorization allow all
header_access Proxy-Authenticate allow all
header_access Cache-Control allow all
header_access Content-Encoding allow all
header_access Content-Length allow all
header_access Content-Type allow all
header_access Date allow all
header_access Expires allow all
header_access Host allow all
header_access If-Modified-Since allow all
header_access Last-Modified allow all
header_access Location allow all
header_access Pragma allow all
header_access Accept allow all
header_access Accept-Charset allow all
header_access Accept-Encoding allow all
header_access Accept-Language allow all
header_access Content-Language allow all
header_access Mime-Version allow all
header_access Retry-After allow all
header_access Title allow all
header_access Connection allow all
header_access Proxy-Connection allow all
header_access Cookie allow all
header_access Set-Cookie allow all
header_access All deny all

acl ip4 myaclname yourip
tcp_outgoing_address yourip myaclname

Generate acl and tcp_outgoing_address:

for f in {314..372}; do echo “acl ip$((f))” myip aaa.bbb.ccc.$((f-246)) >> “blah1″; done
for f in {314..372}; do echo “tcp_outgoing_address aaa.bbb.ccc.$((f-246))” ip$((f)) >> “blah1″; done

How to redirect my website to be opened through HTTPS?

In order to redirect your website to be opened through HTTPS, you should add the following rewrite rule in your .htaccess file:

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule .* https://www.domain.com/%{REQUEST_URI} [R,L]

This will redirect your domain to https://www.yourdomain.com. If you wish the redirect to work without www, you should remove it from the rewrite rule:

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule .* https://domain.com/%{REQUEST_URI} [R,L]