Install fish

add fish shell repository

sudo apt-add-repository ppa:fish-shell/release-3

Update and Upgrade Repository Packages

sudo apt-get update && sudo apt-get upgrade

Install Fish Shell
```
sudo apt-get install fish
```

Set Fish Shell as the Default Shell

buka file chsh
```
sudo nano /etc/pam.d/chsh
```
masukkan # didepan line auth required pam_shells.so
simpan hasil perubahan
jalankan perintah
```
sudo chsh -s $(which fish)
```
buka lagi file chsh
hapus tanda # dipan line auth required pam_shells.so
save

Test

sudo -i

Referensi