Install XRDP in Centos 7

rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

yum update

yum groupinstall "GNOME Desktop" "Graphical Administration Tools"

ln -sf /lib/systemd/system/runlevel5.target /etc/systemd/system/default.target

reboot

install xrdp package :
yum -y install xrdp tigervnc-server

start xrdp service :

systemctl start xrdp

check status of xrdp :

netstat -antup | grep xrdp

enable xrdp to automatic start on boot  :

systemctl enable xrdp

Edit xrdp.in file and make below entry:

vi /etc/xrdp/xrdp.ini is now:

[xrdp1]
name=my.default
lib=libvnc.so
username=ask
password=ask
ip=127.0.0.1
port=5900

save and exit

systemctl restart xrdp

Allow port in firewall :

firewall-cmd --permanent --add-port=3389/tcp
firewall-cmd --reload

if enable selinux :

chcon --type=bin_t /usr/sbin/xrdp
chcon --type=bin_t /usr/sbin/xrdp-sesman

Enjoy XRDP connection

Reset Grace Period of Windows Server 2012 RDS

Error:

the remote session was disconnected because there are no remote desktop license servers available to provide license in aws

Solution:

The solution is to delete the REG_BINARY in:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\GracePeriod

To delete the key you must take ownership and give admin users full control.

After a restart the server will reset the grace period to 120 days.

Install awscli on windows using cygwin

1. download https://cygwin.com/install.html and Install cygwin  with following packages python -(select this package python:python language interpreter ), curl (select all)

2. open cygwin terminal and run below command

curl "https://bootstrap.pypa.io/get-pip.py" -o "get-pip.py"
python get-pip.py

Then, we need to install awscli via pip:

pip install awscli

3. Configure aws account in awscli
$aws configure

run upload command
$aws s3 cp /cygdrive/e/file.vhd s3://bucketname

Comman error :
curl: (48) An unknown option was passed in to libcurl
solution:

install proper curl package or may be resolve by install apt-cyg

error :
-bash: python: command not found

solution:
run again cygwin setup file and select package python - python:python language interpreter  and install it

The requested URL returned error: 403 Forbidden

Error : 
error: The requested URL returned error: 403 Forbidden while accessing https://github.com/xxxx/store.git/info/refs

fatal: HTTP request failed

Solution :

check git version ; may be using older version if using older version please update it

Install require packages
# yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel

Download latest git source

# cd /usr/src
# wget https://git-core.googlecode.com/files/git-1.8.5.3.tar.gz
# tar xzf git-1.8.5.3.tar.gz

3. Install it

# cd git-1.8.5.3
# make prefix=/usr/src/git all
# make prefix=/usr/src/git install
# echo "export PATH=$PATH:/usr/src/git/bin" >> /etc/bashrc
# source /etc/bashrc

4. git version

# git --version
git version 1.8.5.3

How to Send Email via SMTP Server from gmail Account or other mail account

Configure SSMTP on Linux/Centos

1. install ssmtp package
   #yum install ssmtp

2. Configure SSMTP  - edit vi /etc/ssmtp/ssmtp.conf
#mailhub=mail
root=abc@gmail.com
mailhub=smtp.gmail.com:587
AuthUser=abc@gmail.com
AuthPass=xxxxxx
UseSTARTTLS=YES
TLS_CA_File=/etc/pki/tls/certs/ca-bundle.crt
RewriteDomain=localhost
Hostname=localhost

save and exit.

3. Test sendmail command line
   #ssmtp xxxx@gmail.com
    type masg
    Ctrl+D       ( close and send the massage)

 4. Send mail to multiple recipients using in script
    #ssmtp abc@gmail.com, zyz@gmail.com < msg.txt

Allow/block ports in Linux/centos/redhat iptables

If you want to open port in firewall via command line

vi /etc/sysconfig/iptables and add below line

-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT

save and exit.

#service iptables restart

Mount AWS S3 bucket in linux

yum remove fuse fuse-s3fs
yum install automake fuse-devel gcc-c++ git libcurl-devel libxml2-devel make openssl-devel
cd s3fs-fuse
cd /opt/
git clone https://github.com/s3fs-fuse/s3fs-fuse.git
cd s3fs-fuse
./autogen.sh
./configure
make
make install
echo MYIDENTITY:MYCREDENTIAL > ~/.passwd-s3fs
chmod 600 ~/.passwd-s3fs
mkdir /tmp/cache
mkdir -p /s3localfolder
chmod 777 /tmp/cache /s3localfolder
s3fs -o use_cache=/tmp/cache s3bucket /s3localfolder

create script: 
vi /usr/bin/mounts3.sh
#!/bin/bash
sleep 60
s3fs -o use_cache=/tmp/cache s3bucket /s3localfolder
echo "Amazon S3 bucket connected!"
save and exit

Create systemd service for S3FS

create new file:
 /etc/systemd/system/mounts3.service

and put below data :

[Unit]
Description=Mounts Amazon S3 bucket
After=syslog.target
After=network.target

[Service]
User=root
WorkingDirectory=/usr/bin
ExecStart=/bin/bash mounts3.sh start
Type=forking
KillMode=process

# Time for the shell script to start up
TimeoutSec=120

[Install]
WantedBy=multi-user.target

save and exit

Check service :

systemctl start/stop mounts3
Enable service on system boot:

systemctl enable mounts3


Thats it.....