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Read more about the article How to Display Grub Menu at Boot Time in Ubuntu
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How to Display Grub Menu at Boot Time in Ubuntu

  • Post author:Christos Pontikis
  • Post published:October 25, 2016
  • Post category:Linux Administration
  • Reading time:2 mins read

In Ubuntu, Grub boot menu is hidden by default. You can display it by pressing "SHIFT" continuously at boot time. This is useful (among other cases) in case you want…

Continue ReadingHow to Display Grub Menu at Boot Time in Ubuntu
Read more about the article When to Restart Services or Reboot after Update on Debian or Ubuntu
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When to Restart Services or Reboot after Update on Debian or Ubuntu

  • Post author:Christos Pontikis
  • Post published:October 19, 2016
  • Post category:Linux Administration
  • Reading time:3 mins read

After update Debian (or Ubuntu) using apt-get update && apt-get -V upgrade you need to know which services need restart and if system reboot is required (kernel upgrade). A common…

Continue ReadingWhen to Restart Services or Reboot after Update on Debian or Ubuntu
Read more about the article How To Create Fast And Reliable Backup Using Rsnapshot
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How To Create Fast And Reliable Backup Using Rsnapshot

  • Post author:Christos Pontikis
  • Post published:October 16, 2016
  • Post category:Backup
  • Reading time:13 mins read

rsync is probably the most common solution for backup on Linux, because it is extremely fast and makes incremental backups (transfer "only differences" between two versions of a file), which…

Continue ReadingHow To Create Fast And Reliable Backup Using Rsnapshot
Read more about the article Update Postgres Major Version in Debian Jessie
Keep calm

Update Postgres Major Version in Debian Jessie

  • Post author:Christos Pontikis
  • Post published:January 24, 2016
  • Post category:Database Administration
  • Reading time:8 mins read

Postgresql update is not a trivial task. According to PostgreSQL Versioning policy: A major release is numbered by increasing either the first or second part of the version number, e.g.…

Continue ReadingUpdate Postgres Major Version in Debian Jessie
Read more about the article A Simple Guide to Obtain and Install an SSL Certificate
Data key

A Simple Guide to Obtain and Install an SSL Certificate

  • Post author:Christos Pontikis
  • Post published:September 7, 2015
  • Post category:Linux Administration
  • Reading time:18 mins read

More and more companies use SSL certificates (small data files that digitally bind a cryptographic key) to protect their customers sensitive data, as username, password and credit card number, as…

Continue ReadingA Simple Guide to Obtain and Install an SSL Certificate
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