Berikut dijelaskan bagaimana Cara Upgrade Ubuntu 16.04 ke 18.04 versi LTS dengan Terminal :

1. Sebelum memulai upgrade, pastikan kalian sudah mengupdate Ubuntu 16.04 milik kalian. Lakukan dengan perintah
   
   sudo apt update && sudo apt dist-upgrade && sudo apt autoremove

   1	sudo apt update && sudo apt dist-upgrade && sudo apt autoremove

2. Lalu tahap selanjutnya ialah kita menginstall update manager dengan perintah :
   
   sudo apt-get install update-manager-core

   1	sudo apt-get install update-manager-core

3. Setelah menginstall update manager, kita harus memastikan apakah updatenya sudah mengarah ke rilis LTS.
   
   sudo nano /etc/update-manager/release-upgrades

   1	sudo nano /etc/update-manager/release-upgrades

4. Cek isi paling bawah promptnya adalah LTS.
   
   # Default behavior for the release upgrader. [DEFAULT] # Default prompting behavior, valid options: # # never - Never check for a new release. # normal - Check to see if a new release is available. If more than one new # release is found, the release upgrader will attempt to upgrade to # the release that immediately succeeds the currently-running # release. # lts - Check to see if a new LTS release is available. The upgrader # will attempt to upgrade to the first LTS release available after # the currently-running one. Note that this option should not be # used if the currently-running release is not itself an LTS # release, since in that case the upgrader won't be able to # determine if a newer release is available. Prompt=lts

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   # Default behavior for the release upgrader.   [DEFAULT] # Default prompting behavior, valid options: # #  never  - Never check for a new release. #  normal - Check to see if a new release is available.  If more than one new #           release is found, the release upgrader will attempt to upgrade to #           the release that immediately succeeds the currently-running #           release. #  lts    - Check to see if a new LTS release is available.  The upgrader #           will attempt to upgrade to the first LTS release available after #           the currently-running one.  Note that this option should not be #           used if the currently-running release is not itself an LTS #           release, since in that case the upgrader won't be able to #           determine if a newer release is available. Prompt=lts

5. Tahap terakhir ialah, kita mengupgrade ke versi lts ubuntu dengan perintah :
   
   sudo do-release-upgrade -d

   1	sudo do-release-upgrade -d

6. Jika ada pertanyaan konfirmasi yang harus dijawab, jawab dengan opsi Y untuk yes atau n untuk no.

7. Setelah update selesai, kamu dapat merestart sistem operasi mu agar bisa menerapkan sistem operasi Ubuntu 18.04 LTS.

Selesai, demikian penjelasan tentang Cara Upgrade Ubuntu ke versi LTS dengan Terminal