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Install Apache Tomcat 8 on Ubuntu 16.04

Posted on April 21, 2018 by Mahmood

Install Java Create Tomcat User

sudo groupadd tomcat
sudo useradd -s /bin/false -g tomcat -d /opt/tomcat tomcat

1 2	sudo groupadd tomcat sudo useradd -s /bin/false -g tomcat -d /opt/tomcat tomcat

Install Tomcat

sudo mkdir /opt/tomcat
wget http://apache.mirrors.ionfish.org/tomcat/tomcat-8/v8.5.5/bin/apache-tomcat-8.5.5.tar.gz

1 2	sudo mkdir /opt/tomcat wget http://apache.mirrors.ionfish.org/tomcat/tomcat-8/v8.5.5/bin/apache-tomcat-8.5.5.tar.gz

Update Permissions

cd /opt/tomcat
sudo chgrp -R tomcat /opt/tomcat
sudo chmod -R g+r conf
sudo chmod g+x conf
sudo chown -R tomcat webapps/ work/ temp/ logs/

cd /opt/tomcat

sudo chgrp -R tomcat /opt/tomcat

sudo chmod -R g+r conf

sudo chmod g+x conf

sudo chown -R tomcat webapps/ work/ temp/ logs/

Create a systemd Service File

sudo update-java-alternatives -l

1	sudo update-java-alternatives -l

Output
java-1.8.0-openjdk-amd64       1081       /usr/lib/jvm/java-1.8.0-openjdk-amd64

1 2	Output java-1.8.0-openjdk-amd64 1081 /usr/lib/jvm/java-1.8.0-openjdk-amd64

sudo nano /etc/systemd/system/tomcat.service

1	sudo nano /etc/systemd/system/tomcat.service

[Unit]
Description=Apache Tomcat Web Application Container
After=network.target

[Service]
Type=forking

Environment=JAVA_HOME=<span style="color: #ff0000;">/usr/lib/jvm/java-1.8.0-openjdk-amd64/jre</span>
Environment=CATALINA_PID=/opt/tomcat/temp/tomcat.pid
Environment=CATALINA_HOME=/opt/tomcat
Environment=CATALINA_BASE=/opt/tomcat
Environment='CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC'
Environment='JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom'

ExecStart=/opt/tomcat/bin/startup.sh
ExecStop=/opt/tomcat/bin/shutdown.sh

User=tomcat
Group=tomcat
UMask=0007
RestartSec=10
Restart=always

[Install]
WantedBy=multi-user.target

[Unit]

Description=Apache Tomcat Web Application Container

After=network.target

[Service]

Type=forking

Environment=JAVA_HOME=<span style="color: #ff0000;">/usr/lib/jvm/java-1.8.0-openjdk-amd64/jre</span>

Environment=CATALINA_PID=/opt/tomcat/temp/tomcat.pid

Environment=CATALINA_HOME=/opt/tomcat

Environment=CATALINA_BASE=/opt/tomcat

Environment='CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC'

Environment='JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom'

ExecStart=/opt/tomcat/bin/startup.sh

ExecStop=/opt/tomcat/bin/shutdown.sh

User=tomcat

Group=tomcat

UMask=0007

RestartSec=10

Restart=always

[Install]

WantedBy=multi-user.target

sudo systemctl daemon-reload

1	sudo systemctl daemon-reload

sudo systemctl start tomcat

1	sudo systemctl start tomcat

sudo systemctl status tomcat

1	sudo systemctl status tomcat

Configure […]

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Sizing Gen-Sets For Large Motor Starting

Posted on April 18, 2018 by Mahmood

Here’s a simple rule for estimating the size of an engine-generator set for motor starting: 1kW of generator set rating per each 3/4 to 1 […]

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Right To Left SnackBar on Android

Posted on April 7, 2018 by Mahmood

final Snackbar snackbar = Snackbar.make(loginMainLayout, "نام کاربری یا کلمه عبور نادرست است", Snackbar.LENGTH_INDEFINITE);
//TextView snackbarTextView = (TextView)snackbar.getView().findViewById(android.support.design.R.id.snackbar_text);
//snackbarTextView.setLayoutDirection(View.LAYOUT_DIRECTION_RTL);

snackbar.getView().setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
snackbar.getView().setTextDirection(View.TEXT_DIRECTION_RTL);

final Snackbar snackbar = Snackbar.make(loginMainLayout, "نام کاربری یا کلمه عبور نادرست است", Snackbar.LENGTH_INDEFINITE);

//TextView snackbarTextView = (TextView)snackbar.getView().findViewById(android.support.design.R.id.snackbar_text);

//snackbarTextView.setLayoutDirection(View.LAYOUT_DIRECTION_RTL);

snackbar.getView().setLayoutDirection(View.LAYOUT_DIRECTION_RTL);

snackbar.getView().setTextDirection(View.TEXT_DIRECTION_RTL);

References https://stackoverflow.com/questions/35251791/right-to-left-snackbar

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How to pin either a Batch file to Windows 7, 8 and 10 Taskbar

Posted on February 24, 2018 by Mahmood

change target to something like: cmd.exe /C "path-to-your-batch" References https://superuser.com/questions/100249/how-to-pin-either-a-shortcut-or-a-batch-file-to-the-new-windows-7-8-and-10-task

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Install RabbitMQ on Ubuntu 16.04

Posted on February 23, 2018 by Mahmood

Adding repository entry

wget https://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb
sudo dpkg -i erlang-solutions_1.0_all.deb

1 2	wget https://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb sudo dpkg -i erlang-solutions_1.0_all.deb

Installing Erlang

sudo apt-get update
sudo apt-get install erlang

1 2	sudo apt-get update sudo apt-get install erlang

Install RabbitMQ

echo "deb https://dl.bintray.com/rabbitmq/debian xenial main" | sudo tee /etc/apt/sources.list.d/bintray.rabbitmq.list

1	echo "deb https://dl.bintray.com/rabbitmq/debian xenial main" \| sudo tee /etc/apt/sources.list.d/bintray.rabbitmq.list

wget -O- https://dl.bintray.com/rabbitmq/Keys/rabbitmq-release-signing-key.asc |
     sudo apt-key add -

1 2	wget -O- https://dl.bintray.com/rabbitmq/Keys/rabbitmq-release-signing-key.asc \| sudo apt-key add -

wget -O- https://www.rabbitmq.com/rabbitmq-release-signing-key.asc | sudo apt-key add -

1	wget -O- https://www.rabbitmq.com/rabbitmq-release-signing-key.asc \| sudo apt-key add -

sudo apt-get update

1	sudo apt-get update

sudo apt-get install rabbitmq-server

1	sudo apt-get install rabbitmq-server

References https://packages.erlang-solutions.com/erlang/#tabs-debian https://www.rabbitmq.com/install-debian.html

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Check CPU Clock on Linux

Posted on February 3, 2018 by Mahmood

lscpu | grep MHz

1	lscpu \| grep MHz

References https://askubuntu.com/questions/218567/any-way-to-check-the-clock-speed-of-my-processor

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Use aria2 with max connection

Posted on January 26, 2018 by Mahmood

aria2c -k 1M -s 10 -x 10 http://mirror.sg.leaseweb.net/speedtest/100mb.bin

1	aria2c -k 1M -s 10 -x 10 http://mirror.sg.leaseweb.net/speedtest/100mb.bin

References https://github.com/aria2/aria2/issues/465

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Setup PPTP Server on Ubuntu 16.04

Posted on January 24, 2018 by Mahmood

apt-get install pptpd

1	apt-get install pptpd

nano /etc/pptpd.conf

1	nano /etc/pptpd.conf

localip 10.0.0.1
remoteip 10.0.0.100-200

1 2	localip 10.0.0.1 remoteip 10.0.0.100-200

Setup authentication adding users and passwords. Simply add them to /etc/ppp/chap-secrets

nano /etc/ppp/chap-secrets

1	nano /etc/ppp/chap-secrets

Add DNS Servers

nano /etc/ppp/pptpd-options

1	nano /etc/ppp/pptpd-options

ms-dns 8.8.8.8
ms-dns 8.8.4.4

1 2	ms-dns 8.8.8.8 ms-dns 8.8.4.4

service pptpd restart

1	service pptpd restart

Setup Forwarding

nano /etc/sysctl.conf
net.ipv4.ip_forward = 1
sysctl -p

nano /etc/sysctl.conf

net.ipv4.ip_forward = 1

sysctl -p

Create […]

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Install and Configure Shadowsocks with obfusaction

Posted on January 19, 2018 by Mahmood

# Debian / Ubuntu
sudo apt-get install --no-install-recommends build-essential autoconf libtool libssl-dev libpcre3-dev libev-dev asciidoc xmlto automake

git clone https://github.com/shadowsocks/simple-obfs.git
cd simple-obfs
git submodule update --init --recursive
./autogen.sh
./configure && make
sudo make install

# Debian / Ubuntu

sudo apt-get install --no-install-recommends build-essential autoconf libtool libssl-dev libpcre3-dev libev-dev asciidoc xmlto automake

git clone https://github.com/shadowsocks/simple-obfs.git

cd simple-obfs

git submodule update --init --recursive

./autogen.sh

./configure && make

sudo make install

On the server:

ss-server -c config.json --plugin obfs-server --plugin-opts "obfs=http"

1	ss-server -c config.json --plugin obfs-server --plugin-opts "obfs=http"

References https://github.com/shadowsocks/simple-obfs https://github.com/shadowsocks/shadowsocks-libev

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How to setup a Socks5 Proxy server on Ubuntu 16.04 with Dante

Posted on January 17, 2018 by Mahmood

nano /etc/danted.conf

1	nano /etc/danted.conf

# /etc/danted.conf

logoutput: syslog
user.privileged: root
user.unprivileged: nobody

# The listening network interface or address.
internal: 0.0.0.0 port=1080

# The proxying network interface or address.
external: eth0

# socks-rules determine what is proxied through the external interface.
# The default of "none" permits anonymous access.
socksmethod: username

# client-rules determine who can connect to the internal interface.
# The default of "none" permits anonymous access.
clientmethod: none

client pass {
        from: 0.0.0.0/0 to: 0.0.0.0/0
        log: connect disconnect error
}

socks pass {
        from: 0.0.0.0/0 to: 0.0.0.0/0
        log: connect disconnect error
}

# /etc/danted.conf

logoutput: syslog

user.privileged: root

user.unprivileged: nobody

# The listening network interface or address.

internal: 0.0.0.0 port=1080

# The proxying network interface or address.

external: eth0

# socks-rules determine what is proxied through the external interface.

# The default of "none" permits anonymous access.

socksmethod: username

# client-rules determine who can connect to the internal interface.

# The default of "none" permits anonymous access.

clientmethod: none

client pass {

from: 0.0.0.0/0 to: 0.0.0.0/0

log: connect disconnect error

}

socks pass {

from: 0.0.0.0/0 to: 0.0.0.0/0

log: connect disconnect error

}

References http://www.binarytides.com/setup-dante-socks5-server-on-ubuntu/

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