Category: Linux

OVH Cloud

Configure Failover IP in Ubuntu 20.04 OVH VPS
Ubuntu Server 20.04 configure OVH failover IP
Configure Failover IP in Ubuntu 18.04 OVH VPS
Configure Networking in Fedora 28 OVH Proxmox
Debian 9 OVH Bridge Network Configuration
OVH VPS Configure failover IP in Ubuntu
How to set Reverse DNS (rDNS/PTR Record) for IP in OVH Dedicated Server
How to install OS on OVH VPS (Virtual Private Server)
How to Install Cpanel + CentOS 7 on OVH Dedicated Server
Set Static IP in RHEL 8 OVH VPS
Install AlmaLinux + Cpanel on OVH VPS
How to set rDNS/PTR Record on OVH VPS
Reset root Password On OVH Dedicated Server
How to install VMware ESXi on OVH Dedicated Server
How to restart (reboot) OVH Dedicated Server
How to change DNS nameservers for an OVHcloud domain name
How to configure IPv6 on OVH AlmaLinux 8 server
How to Reset OVH VPS root Password

Install CentOS 8 on OVH Dedicated Server

OVH Server Upgrade

If you decide to purchase a new service with OVH, we can offer you a time transfer from your server ns538413.ip-144-217-71.net to the new one as long as the server ns538413.ip-144-217-71.net has at least 15 days left after you delete it.

Keep in mind if the new server is a more expensive model, the monetary value will be transferred pro-rated to the new server and that if the new server is of equal or lesser value, we will transfer the balance on a day-for-day basis.

OVH support Phone number: 1-855-684-5463

If you need to attach image in ticket, upload your image at

https://plik.ovhcloud.com

Then share it in the ticket as OVH support won’t visit any other site and help desk have no option to attach files.

March 8, 2019
Install gifsicle from source
gifsicle is a command line tool for editing, and creating GIF images.

You can get it from

https://www.lcdf.org/gifsicle

To install, run
```
cd /usr/local/src
wget https://www.lcdf.org/gifsicle/gifsicle-1.91.tar.gz
tar xvf gifsicle-1.91.tar.gz
cd gifsicle-1.91
./configure
make
make install
```
Install optipng from source
Install jpegoptim from source
March 3, 2019
Install jpegoptim from source
jpegoptim is an open source jpeg image optizer. You can download it from

https://github.com/tjko/jpegoptim

To instll it, download latest version from

https://github.com/tjko/jpegoptim/releases

For version 1.4.6, run
```
cd /usr/local/src
wget https://github.com/tjko/jpegoptim/archive/RELEASE.1.4.6.tar.gz -O jpegoptim.tar.gz
tar xvf jpegoptim.tar.gz
cd jpegoptim-RELEASE.1.4.6/
./configure
make
make install
```
March 3, 2019

gem install error libxslt is missing

When installing ruby gem, i get following error

[root@video1 cms]# gem install sanitize -v 1.2.1 --no-ri --no-rdoc
Building native extensions.  This could take a while...
ERROR:  Error installing sanitize:
	ERROR: Failed to build gem native extension.

/usr/local/rvm/rubies/ruby-1.8.7-head/bin/ruby extconf.rb
checking for libxml/parser.h... yes
checking for libxslt/xslt.h... no
-----
libxslt is missing.  please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
-----
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/usr/local/rvm/rubies/ruby-1.8.7-head/bin/ruby
	--with-zlib-dir
	--without-zlib-dir
	--with-zlib-include
	--without-zlib-include=${zlib-dir}/include
	--with-zlib-lib
	--without-zlib-lib=${zlib-dir}/lib
	--with-iconv-dir
	--without-iconv-dir
	--with-iconv-include
	--without-iconv-include=${iconv-dir}/include
	--with-iconv-lib
	--without-iconv-lib=${iconv-dir}/lib
	--with-xml2-dir
	--without-xml2-dir
	--with-xml2-include
	--without-xml2-include=${xml2-dir}/include
	--with-xml2-lib
	--without-xml2-lib=${xml2-dir}/lib
	--with-xslt-dir
	--without-xslt-dir
	--with-xslt-include
	--without-xslt-include=${xslt-dir}/include
	--with-xslt-lib
	--without-xslt-lib=${xslt-dir}/lib


Gem files will remain installed in /usr/local/rvm/gems/ruby-1.8.7-head/gems/nokogiri-1.4.7 for inspection.
Results logged to /usr/local/rvm/gems/ruby-1.8.7-head/gems/nokogiri-1.4.7/ext/nokogiri/gem_make.out
[root@video1 cms]#

Soluton

Install missing libxslt devel package.

On CentOS installed.

yum install -y libxslt-devel

For error “libxml2 is missing.”, install

yum install -y libxml2-devel

February 28, 2019

Convert CentOS to CloudLinux
CloudLinux is a popular Linux distribution used by shared hosting providers. Some of the advantages of cloudlinux is users are running inside its own light weight virtual environment (CageFS). This will protect other sites on the server if one of the sites gets hacked. Also, CloudLinux allows you to set resource limits for each site, this way no one site can take down the entire web server.

You can find more details on cloudlinux at the official website

https://cloudlinux.com

If you are using CentOS on your server, you can easily convert it to CloudLInux.

To convert CentOS to CloudLinux, run
```
wget https://repo.cloudlinux.com/cloudlinux/sources/cln/cldeploy
sh cldeploy -k LICENSE_KEY_HERE
```
You can get an activation key by getting 30 day trail or purchasing a CloudLinux license.

If you have IP based license, run
```
wget https://repo.cloudlinux.com/cloudlinux/sources/cln/cldeploy
sh cldeploy -i
```
Once install completed, reboot the server to get the server booted with CloudLinux kernel.
```
reboot
```
See cloudlinux
February 27, 2019
Reset VestaCP admin password
To reset VestaCP admin password, loign to SSH, run
```
v-change-user-password admin NEW_PASSWOARD
```
if above method did not work, try
```
passwd admin
```
See VestaCP Free Hosting Control Panel
February 25, 2019
cagefs mount points exists
On WHM > CloudLinux LVE Manager, i get following warning

Check cagefs mount points exists

There are missing mount points: [‘/usr/local/cpanel/whostmgr/docroot/cgi/softaculous’]

This error is due to softaculous was removed from server, but was not removed from cagefs mount points file.

To fix this error, edit file
```
vi /etc/cafefs/cagefs.mp
```
Remove the line
```
/usr/local/cpanel/whostmgr/docroot/cgi/softaculous
```
February 24, 2019
EasyEngine
EasyEngine is a command line tool to manage/configure Nginx web server.

https://easyengine.io

To install EasyEngine, run
```
wget -qO ee rt.cx/ee4 && sudo bash ee
```
Create Web Site
EasyEngine HOWTOs
EasyEngine Errors
- EasyEngine Could not create user
EasyEngine Folders

/opt/easyengine/services/docker-compose.yml docker-compose file
/opt/easyengine/sites/DOMAIN_NAME_HERE/app/htdocs Website document root
/opt/easyengine/services/mariadb MySQL data dir

Restart Nginx container for a site
```
ee site restart SITE_URL_HERE --nginx
```
Clear Object cache for a site
```
ee site clean SITE_URL_HERE
```
February 18, 2019

Configure Failover IP in Ubuntu 18.04 OVH VPS

Default /etc/network/interfaces in Ubuntu 18.04 in OVH VPS look like following. Click here for Ubuntu 20.04 instructions.

root@vps624512:~# cat /etc/network/interfaces 
# ifupdown has been replaced by netplan(5) on this system.  See
# /etc/netplan for current configuration.
# To re-enable ifupdown on this system, you can run:
#    sudo apt install ifupdown
root@vps624512:~#

First install

sudo apt install ifupdown -y

Configure Main IP

use “ip a” command to find out interface name and IP of the VPS

root@vps624512:~# ip a
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens3:  mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether fa:16:3e:f4:1e:fd brd ff:ff:ff:ff:ff:ff
    inet 51.77.149.182/32 scope global dynamic ens3
       valid_lft 49349sec preferred_lft 49349sec
    inet6 fe80::f816:3eff:fef4:1efd/64 scope link 
       valid_lft forever preferred_lft forever
root@vps624512:~#

In this case,

IP = 51.77.149.182
Interface Name = ens3

Use “route -n” command to find out gateway.

root@vps624512:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         51.77.148.1     0.0.0.0         UG    100    0        0 ens3
51.77.148.1     0.0.0.0         255.255.255.255 UH    100    0        0 ens3
root@vps624512:~#

GATEWAY = 51.77.148.1

Edit /etc/network/interfaces

vi /etc/network/interfaces

Add following

auto INTERFACE_NAME
iface INTERFACE_NAME inet static
    address SEVER_MAIN_IP
    netmask 255.255.255.255
    broadcast SEVER_MAIN_IP
    dns-nameservers 8.8.8.8 1.1.1.1
    post-up route add GATEWAY_IP dev INTERFACE_NAME
    post-up route add default gw GATEWAY_IP
    post-down route del default gw GATEWAY_IP
    post-down route del GATEWAY_IP dev INTERFACE_NAME

In the above, replace INTERFACE_NAME, SEVER_MAIN_IP and GATEWAY_IP.

For this server, i added.

auto ens3
iface ens3 inet static
    address 51.77.149.182
    netmask 255.255.255.255
    broadcast 51.77.149.182
    post-up route add 51.77.148.1 dev ens3
    post-up route add default gw 51.77.148.1
    post-down route del default gw 51.77.148.1
    post-down route del 51.77.148.1 dev ens3

Now reboot the server.

Once server is back online, you can configure failover IPS.

Configure Failover IP

Use following script to generate your config, add in end of /etc/network/inferfaces file

php script to generate ip config

Once configured, you need to reboot the servr.

Verify IP is up with fping command.

fping
/etc/inetnet/interfaces

February 16, 2019

Install ffmpeg on Ubuntu
To install ffmpeg 4 on Ubuntu, you can use PPA

https://launchpad.net/~jonathonf/+archive/ubuntu/ffmpeg-4
```
apt install software-properties-common -y
add-apt-repository ppa:jonathonf/ffmpeg-4 -y
```
Now install ffmpeg with
```
apt update && apt install ffmpeg -y
```
See ffmpeg
January 30, 2019
Sending Email with telnet
To send an email with telent, run
```
telnet MAIL_SERVER_IP 25
```
On the prompt, type the following
```
ehlo localhost
mail from: 
rcpt to: 
data
Subject: Testing

This is text email.
.
quit
```
Email need to be specified within < and > symbols.

See Telnet
January 27, 2019
Install Squid Proxy Server
Proxy server allows hiding your IP address. You can find the Squid Proxy Installer script at

https://github.com/serverok/squid-proxy-installer

The script supports the following Operating systems
- Ubuntu 18.04, 20.04, 22.04, 24.04
- Debian 8, 9, 10, 11, 12, 13
- CentOS 8
- CentOS Steam 8, 9
- AlmaLinux 8, 9
Video Tutorial

How to install Squid Proxy Server in DigitalOcean Droplet (VPS).

https://rumble.com/vdswgv-install-squid-proxy-server-in-digitalocean-vps.html
https://odysee.com/squid-proxy-install:1

Become user root

If you are not logged in as user root, you need to become user root. This can be done with the command
```
sudo su
```
If sudo su did not work for you, try
```
su -
```
Install wget

On CentOS/AlmaLinix
```
yum install -y wget
```
On Ubuntu/Debian
```
apt install -y wget
```
install squid proxy server

To install squid proxy server, run
```
wget https://raw.githubusercontent.com/serverok/squid-proxy-installer/master/squid3-install.sh -O squid3-install.sh
bash squid3-install.sh
```
After installing Squid Proxy Server, you may need to change the port. For instructions, see How to change Port of Squid Proxy Server

Create a Proxy User

To create a user in squid proxy, run
```
sudo squid-add-user
```
To change the password for an existing user, just create the user again with a different password. This will update the existing user password.

Configure Multiple IPs

If you have multiple IP addresses on the server, first make sure IPs are properly configured on your web server. If your secondary IPs are configured, you should be able to ping to these IPs and connect to the server using the IP address.

Once IPs are configured in the server and able to ping, you can run following commands
```
wget https://raw.githubusercontent.com/serverok/squid-proxy-installer/master/squid-conf-ip.sh
sudo bash squid-conf-ip.sh
```
Now you will be able to use all IP available in the server as a proxy server.

This won’t work if your IPs are behind NAT. You can verify this by running the command “ip a”, it should list all IP addresses.

Test Proxy Server with curl
```
curl -U PROXY_USER:PROXY_PW -x MY_PROXY_SERVER:PROXY_PORT https://checkip.amazonaws.com
```
Related Posts
January 27, 2019

/opt/easyengine/services/docker-compose.yml	docker-compose file
/opt/easyengine/sites/DOMAIN_NAME_HERE/app/htdocs	Website document root
/opt/easyengine/services/mariadb	MySQL data dir

Category: Linux

OVH Server Upgrade

Create Web Site

EasyEngine HOWTOs

EasyEngine Errors

EasyEngine Folders

Video Tutorial

Become user root

Install wget

install squid proxy server

Create a Proxy User

Configure Multiple IPs

Test Proxy Server with curl