ServerOK – Page 136 – Linux Server Management

Install ionCube Loader on CentOS 7

Go to http://www.ioncube.com/loaders.php Download latest version of ionCube Loader

cd /usr/local/src
wget https://downloads.ioncube.com/loader_downloads/ioncube_loaders_lin_x86-64.tar.gz
tar xvf ioncube_loaders_lin_x86-64.tar.gz
cd ioncube

cd /usr/local/src

wget https://downloads.ioncube.com/loader_downloads/ioncube_loaders_lin_x86-64.tar.gz

tar xvf ioncube_loaders_lin_x86-64.tar.gz

cd ioncube

Find out PHP version you are using with command

php -v

php -v

Here we have PHP version 5.6, now you need to find the available loaders for PHP 5.6 with command

ls -l | grep 5.6

1	ls -l \| grep 5.6

The one we needed is ioncube_loader_lin_5.6.so You need to copy it to PHP extension_dir directory. […]

xrdp allow you to connect to Linux Desktop using Windows Remote Desktop. First you need to install desktop environment. Installing something light weight like XFCE is better if you are using a remote server.

apt-get install xfce4

1	apt-get install xfce4

This will download approx 500 MB of files and install on Ubuntu 16.04. Next install xrdp

apt-get install xrdp

1	apt-get install xrdp

You need to […]

SMTP

swaks – command line SMTP testing tool. mailtrap – SMTP server for development. Cloud providers like Amazon AWS, Alibaba, Microsoft Azure, Google Cloud and DigitalOcean do not allow you to run your own mail server. If you need to sent an email from your web application, you need to use one of the Transnational Email […]

useradd

To create a user, run

useradd -m -s /bin/bash USERNAME

1	useradd -m -s /bin/bash USERNAME

-m = create home directory. -s = specify location of shell. To create a user with custom home directory, use

useradd -d /var/www -s /bin/bash USERNAME

1	useradd -d /var/www -s /bin/bash USERNAME

Create User with Specific User id Create the user “serverok” with uid 4223, run

useradd -u 4223 serverok

1	useradd -u 4223 serverok

Create User to Run System Service -r option select gid/uid for running system […]

rpaf

mod_rpaf is an apache module that translate proxy IP to real IP when apache web server is behind a proxy server. https://github.com/gnif/mod_rpaf/ To install on Ubuntu, run

apt install -y libapache2-mod-rpaf

1	apt install -y libapache2-mod-rpaf

Config file available at

root@vps528168:~# cat /etc/apache2/mods-enabled/rpaf.conf
    RPAFenable On

    # When enabled, take the incoming X-Host header and
    # update the virtualhost settings accordingly:
    RPAFsethostname On

    # Define which IP's are your frontend proxies that sends
    # the correct X-Forwarded-For headers:
    RPAFproxy_ips 127.0.0.1 ::1 193.70.86.5

    # Change the header name to parse from the default
    # X-Forwarded-For to something of your choice:
    RPAFheader X-Real-IP
root@vps528168:~#

root@vps528168:~# cat /etc/apache2/mods-enabled/rpaf.conf

RPAFenable On

# When enabled, take the incoming X-Host header and

# update the virtualhost settings accordingly:

RPAFsethostname On

# Define which IP's are your frontend proxies that sends

# the correct X-Forwarded-For headers:

RPAFproxy_ips 127.0.0.1 ::1 193.70.86.5

# Change the header name to parse from the default

# X-Forwarded-For to something of your choice:

RPAFheader X-Real-IP

root@vps528168:~#

Apache […]

Nginx Proxy Configuration

Nginx Reverse Proxy behind Cloudflare Nginx CloudFlare restore real ip Show Real IP Nginx Behind Reverse Proxy To configure Nginx as proxy, use following configuration

server {
    listen *:80;
    client_max_body_size 100M;
    proxy_read_timeout 600s;
    proxy_buffer_size   128k;
    proxy_buffers   4 256k;
    proxy_busy_buffers_size   256k;
    location / {
        proxy_set_header X-Real-IP  $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header Host $host;
        proxy_pass http://127.0.0.1:81;
    }
}

server {

listen *:80;

client_max_body_size 100M;

proxy_read_timeout 600s;

proxy_buffer_size 128k;

proxy_buffers 4 256k;

proxy_busy_buffers_size 256k;

location / {

proxy_set_header X-Real-IP $remote_addr;

proxy_set_header X-Forwarded-For $remote_addr;

proxy_set_header Host $host;

proxy_pass http://127.0.0.1:81;

}

If you need to serve images using static files, add following block to nginx config

    location ~ ^/(images|javascript|js|css|flash|media|static)/ {
        root /home/domain.com/html/;
        index index.php index.html;
        expires 30d;
    }

location ~ ^/(images|javascript|js|css|flash|media|static)/ {

root /home/domain.com/html/;

index index.php index.html;

expires 30d;

}

Rule to handle SSL verification If you are proxying traffic to an application […]

Install pureftpd on Ubuntu

To install pure-ftpd on Ubuntu, run

apt install pure-ftpd -y

1	apt install pure-ftpd -y

Create a system user

useradd -d /var/www -s /bin/bash USERNAME
chown -R USERNAME:USERNAME /var/www
passwd USERNAME

useradd -d /var/www -s /bin/bash USERNAME

chown -R USERNAME:USERNAME /var/www

passwd USERNAME

Enable Unix Authentication To allow system user to login using FTP, edit file

vi /etc/pure-ftpd/pure-ftpd.conf

1	vi /etc/pure-ftpd/pure-ftpd.conf

Uncomment the line

UnixAuthentication           yes

1	UnixAuthentication yes

echo 'yes' > /etc/pure-ftpd/conf/UnixAuthentication

1	echo 'yes' > /etc/pure-ftpd/conf/UnixAuthentication

On Ubuntu, after default install, you have following settins.

root@server:/etc/pure-ftpd/auth# ll
total 8
drwxr-xr-x 2 root root 4096 Jan 28 05:52 ./
drwxr-xr-x 5 root root 4096 Jan 28 06:20 ../
lrwxrwxrwx 1 root root   26 Feb  5  2018 65unix -> ../conf/UnixAuthentication
lrwxrwxrwx 1 root root   25 Feb  5  2018 70pam -> ../conf/PAMAuthentication
root@server:~# cat /etc/pure-ftpd/auth/65unix 
no
root@server:~# cat /etc/pure-ftpd/auth/70pam 
yes
root@server:~#

root@server:/etc/pure-ftpd/auth# ll

total 8

drwxr-xr-x 2 root root 4096 Jan 28 05:52 ./

drwxr-xr-x 5 root root 4096 Jan 28 06:20 ../

lrwxrwxrwx 1 root root 26 Feb 5 2018 65unix -> ../conf/UnixAuthentication

lrwxrwxrwx 1 root root 25 Feb 5 2018 70pam -> ../conf/PAMAuthentication

root@server:~# cat /etc/pure-ftpd/auth/65unix

root@server:~# cat /etc/pure-ftpd/auth/70pam

yes

root@server:~#

PAMAuthentication enabled. UnixAutehticiation disabled. This allow system users to login using PAM. pureftpd […]

Pure-FTPd

Install Pure-FTPd on Ubuntu Install Pure-FTPd on CentOS with Virtual Users Ubuntu pure-ftpd reply with unroutable address Install Pure-FTPd from source Enable FTP for EasyEngine Website How to change pure-ftpd port To install Pureftpd on CentOS, run

yum install pure-ftpd

1	yum install pure-ftpd

To start/stop, use

systemctl start pure-ftpd
systemctl stop pure-ftpd

1 2	systemctl start pure-ftpd systemctl stop pure-ftpd

To enable system users to login, edit /etc/pure-ftpd/pure-ftpd.conf, un comment the line UnixAuthentication […]

ERROR 2006 (HY000) at line 348: MySQL server has gone away

When i try to restore a MySQL database, i get following error.

[root@server2 ~]# mysql sok_wp < /var/www/sok_wp.sql
ERROR 2006 (HY000) at line 348: MySQL server has gone away
[root@server2 ~]#

[root@server2 ~]# mysql sok_wp < /var/www/sok_wp.sql

ERROR 2006 (HY000) at line 348: MySQL server has gone away

[root@server2 ~]#

To fix the error, edit file

/etc/my.cnf.d/my.cnf

1	/etc/my.cnf.d/my.cnf

Add

max_allowed_packet=64M

1	max_allowed_packet=64M

Restart MySQL

service mysql restart

1	service mysql restart

if using mariadb, run

service mariadb restart

1	service mariadb restart

MySQL […]