How to upgrade from Ubuntu Linux 16.04 to 18.04

-

Type the apt command or apt-get command to upgrade existing system:

  sudo apt update

  sudo apt upgrade


Reboot the Linux box if kernel was updated

  sudo reboot


If you have a ufw firewall running on ufw, open ssh port 1022 using the following ufw syntax:

  sudo ufw allow 1022/tcp comment 'Temp open port ssh tcp port 1022 for upgrade'


Upgrade the operating system to the latest release from the command-line by typing the following command:

  sudo do-release-upgrade



After some time you will see “System upgrade is complete” message. Press y to restart your system to load updates kernel and operating system for your cloud server:


Verification

Login using the ssh command:

  ssh user@your-ubuntu-server


Verify Ubuntu Linux kernel version with uname:

  uname -r


Make sure all needed ports are open and running with the ss command or netstat command:

  sudo ss -tulpn

  sudo netstat -tulpn


Use grep command/egrep command or tail command/cat command to verify log files for errors:

  dmesg

  tail -f /path/to/log/files

  egrep -i 'err|cri' /var/log/nginx/error.log



Comments

Post a comment

Popular posts from this blog

Wicked-PDF not showing images, 'wicked_pdf_image_tag' undefined

-
Wicked-PDF not showing images, 'wicked_pdf_image_tag' undefined <div>   <%= wicked_pdf_image_tag 'logo.jpg' %> </div> def save   pdf = WickedPdf.new.pdf_from_string(                         render_to_string(                           template: 'example/pdf_view.pdf.erb',                           layout: 'layouts/application.pdf.erb'))   send_data(pdf,             filename: 'file_name.pdf',             type: 'application/pdf',             disposition: 'attachment')  end 
Read more

DmL command || Sql Tutorial -7

-
DML Command Insert Command Its used to insert the record into table example- Command for inserting single record insert into <table name> values(value1, value2...) Command for inserting multiple command at a time insert into <table name> values(&col1, &col2...., &coln); whenever you enter query like this it will ask you to like this - enter a value for column1- value1.. and then hit enter  - enter a value for column2- value2.. and then hit enter - enter a value for column3- value3.. and then hit enter Now it will show 1 row created  if you want to create more record use / and hit enter SQL> /   hit enter // it will Execute most recent query again //this will so again and so on... - enter a value for column1- value1..  and then hit enter  - enter a value for column2- value2..  and then hit enter - enter a value for column3- value3..  and then hit enter // if you will miss any value here that will be inserted as NULL value Update command Used to upda
Read more