Once I installed Debian 8 Jessie it did not have APT repository.
(It happened due to using cd-rom insallation image.)
So, let’s add repository manually.
1. where is repository list?
It is located in
$ sudo ls /etc/apt
2. Check the available mirror repository
You can check available Debian mirror repository list below link:
Choose one what you prefer.
3. Add mirror repository on list
Using editor to edit source-list (I use nano)
$ sudo nano /etc/apt/sources.list
I addedd at the end of file below repository
deb http://ftp.jp.debian.org/debian/ jessie main contrib non-free deb-src http://ftp.jp.debian.org/debian/ jessie main contrib non-free
4. Save and close. Now ready to use use mirror repository
$ sudo apt list
This command will show all available packages from current repository.
That’s all! Congraturation!