General – Lalit Mohan Jaimini

Failed to connect http://changelogs.ubuntu.com/meta-release

sudo rm /var/lib/ubuntu-release-upgrader/release-upgrade-available
sudo /usr/lib/ubuntu-release-upgrader/release-upgrade-motd

Amazon SES setup with django

EMAIL_BECKEND = 'django_smtp_ssl.SSLEmailBackend' (or EMAIL_BECKEND = 'backends.smtp.SSLEmailBackend') EMAIL_HOST = 'email-smtp.us-east-1.amazonaws.com' EMAIL_PORT = 465 EMAIL_HOST_USER = 'SMTP USERNAME' EMAIL_HOST_PASSWORD = 'SMTP PASSWORD' EMAIL_USE_TLS = True

Create ssl in ubuntu, centos and linux

sudo openssl req -new -newkey rsa:2048 -nodes -keyout domain-name.key -out domain-name.csr

Generating a 2048 bit RSA private key

…………………..+++

………………….+++

writing new private key to ‘domain-name.key’

—–

You are about to be asked to enter information that will be incorporated

into your certificate request.

What you are about to enter is what is called a Distinguished Name or a DN.

There are quite a few fields but you can leave some blank

For some fields there will be a default value,

If you enter ‘.’, the field will be left blank.

—–

Country Name (2 letter code) [AU]:Country Code

State or Province Name (full name) [Some-State]:state name

Locality Name (eg, city) []:City Name

Organization Name (eg, company) [Internet Widgits Pty Ltd]:Company name

Organizational Unit Name (eg, section) []:Unit name

Common Name (e.g. server FQDN or YOUR name) []: domain name

Email Address []:email address

Please enter the following ‘extra’ attributes

to be sent with your certificate request

A challenge password []:

An optional company name []:

2. copy csr file and paste third party ssl provider website, then verify domain

3. After verify domain third party given certificate file (like cert.crt), bundle file(like bundle.crt or bundle.ca-bundle)

4. edit in apache sites conf file

ServerName domain-name

ServerAlias www.domain-name

DocumentRoot document

SSLEngine on

SSLCertificateFile /etc/ssl/cert.crt #certificate file full path

SSLCertificateKeyFile /etc/ssl/domain-name.key #key file full path

SSLCertificateChainFile /etc/ssl/bundle.ca-bundle #bundle file full path

</VirtualHost>

</IfModule>

Assign ftp user to specific directory

usermod -d directory-path username
sudo chown username:username directory-path
sudo chmod a-w directory-path
sudo service vsftpd restart

Install vsftpd and create new Ftp user with specific directory in ubuntu

sudo apt-get update
sudo apt-get install vsftpd
sudo vim /etc/vsftpd.confuncomment write_enable=YES
uncomment chroot_local_user=YES

Add at last in file
user_sub_token=$USER

allow_writeable_chroot=YES
sudo mkdir directory-path
sudo adduser –home=directory-path username
sudo chmod -R 0777 directory-path
sudo chown nobody:nogroup directory-path
sudo chown username:username directory-path
sudo chmod a-w directory-path
sudo service vsftpd restart

Get Python Wsgi Module Path Specific Django Project

After Activate Environment
mod_wsgi-express module-config

Connect AWS Server with .ppk file in macbook

ruby -e “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)”
brew install putty
puttygen keyfile.ppk -O private-openssh -o keyfile.pem
sudo chmod 0400 keyfile.pem
ssh -i keyfile.pem user@ip

Reset git username password in mac os

git config --global --unset user.password

Upgrade mariadb 5.5 to 10.2 in centos 7

1. backup all databases first
2. service mariadb stop
3. yum remove mariadb mariadb-server
4. yum install vim epel-release -y
5. vim /etc/yum.repos.d/mariadb.repo
6.then paste this lines and save it : 

# MariaDB 10.2 CentOS repository list - created 2018-02-15 08:21 UTC

# http://downloads.mariadb.org/mariadb/repositories/

[mariadb]

name = MariaDB 
baseurl = http://yum.mariadb.org/10.2/centos7-amd64 gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB 
gpgcheck=1

7. yum install MariaDB-server MariaDB-client -y
8. systemctl enable mariadb
9. systemctl start mariadb
10. mysql_upgrade

Switch Php version

sudo a2dismod php7.2 
sudo a2enmod php5.6 
sudo service apache2 restart

OR


sudo update-alternatives --set php /usr/bin/php5.6 
sudo update-alternatives --set phar /usr/bin/phar5.6 
sudo update-alternatives --set phar.phar /usr/bin/phar.phar5.6  
sudo update-alternatives --set phpize /usr/bin/phpize5.6 
sudo update-alternatives --set php-config /usr/bin/php-config5.6